® ®

Rex® Engineering Manual

Rex® TableTop®

EngineeringManual

CONVEYOR LENGTH AND CONFIGURATION

STRAIGHT -

TRANSFER END START

Figure A

Figure B

- A B

START START

END I I I I I I I END

Figure A Figure B

SIDEFLEXING VS

A B VS

ENDSTART

Rexnord does not build conveyors which use TableTop® chains,

nor does it specify one conveyor design over another. However,

based on many years of application experience, Rexnord is well

qualified to point out general guidelines and alternatives in

conveyor systems design, chain application and chain selection.

Conveyor systems design consists of Systems Economics and

Cost which involves:

1. Conveyor Length and Configuration

2. Chain Width and Speed

3. Overall Conveyor Cost

4. Maintenance

Begin with a review of the overall layout including space

available, structural obstructions and process machinery and the

relative positions of different machines. Then, using the following

considerations, arrive at the optimum machinery and conveyor

layout for proper utilization of TableTop® chains.

The longest, simplest configuration possible, (Fig B) is always

the best. However, sometimes short conveyors with several

transfers must be used to change speeds, change inclines,

accumulate, etc.

Use sideflexing chains and run as far as possible. This

alternative (Fig B) offers the following advantages over Figure A:

Elimination of transfers over dead-plates and turntables.

Less tipping and jamming, less noise.

Elimination of product slippage at transfer points.

Reduction of expense for attendant machinery including motors,

sprockets, etc.

Reduction of expense for attendant machinery including dead-

plates and turntables.

The criteria for conveyor width and speed is the number of

products which must be delivered to a location per unit of time.

The infeed and outfeed of each process machine will dictate

product flow width at the machines. But in-between, the

alternatives range from high speed-single file to intermediate

speed-multiple file on one wide chain to slow speed-multiple file

on multiple wide strands.

Weigh the advantages and disadvantages of each:

Single File Multiple File

High Speed Slow Speed

ADVANTAGES

Less expensive chain Longer chain life due to

slow speed

Less expensive initial Less chance of product

conveyor cost tippage

Longer runs In-line accumulation

less noise

DISADVANTAGES

Faster chain wear More expensive chain

More wear on products More expensive initial

when slippage occurs conveyor cost

More chance of product Shorter runs

tippage and jam-ups

Noisier Multiple chain strands may

cause transfer problems

To determine chain widths and see Page 14, Multiflex.

OVERALL CONVEYOR COST

Overall conveyor cost includes:

1. The cost of one chain versus another.

2. The cost of more efficient chains versus the cost of drives

and transfer equipment.

3. The cost of structural components of one system versus

another.

MAINTENANCE

Of course, keep in mind the future conveyor maintenance. A

system which is less expensive initially will usually require more

maintenance later on.

IN CONCLUSION

There may be more than one right way to utilize TableTop®

chains. Consider the alternatives of length, configuration, width,

speed and cost to design a system which is both economical for

the fabricator and the user.

Rex® Engineering Manual TT-1

INTRODUCTION

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STRAIGHT RUNNING CONVEYOR DESIGN

TRANSFER

DRIVE SPROCKETSEE PAGE 8

CHAINCATENARY

"SAG"SEE PAGE 7

ENTRY RADIUS

SEE PAGE 7

RETURNWEAR STRIP

OR

ROLLER RETURN WAY

SLIDINGRETURN WAY

BROKEN CONTACT

GUIDE RAILSUPPORT

TRAVEL

DEAD-PLATE TRANSFERSEE PAGE 6

TURNABLETRANSFER

SEE PAGE 6

IDLERWHEEL

SEE PAGE

8

CARRYING WEAR STRIP

CARRYING WAY

CARRYING WAY

RETURN WAY

CHAIN

GUIDE RAIL

Straight running chains were the original TableTop® chains.

They required auxiliary means of transferring around corners

such as the dead plate and turntable shown below. The

illustration on this page shows the basics of a simple straight

running conveyor.

There are many variations on this design, so Rexnord

Engineers are available to assist and make recommendations

for any TableTop® application.

Guide clearance, space between wear strips for proper chain

tracking.

At sprocket-chain flex points, the top

plate kick-up should be taken into

account for the best performance in

product transfer. Especially when

using chains 843, 963, and 3873.

Consult Rexnord for specifics.

TT-2 Rex® Engineering Manual

STRAIGHT

RUNNING

CHAINS

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CONVEYOR DESIGN SIDEFLEXING

STRAIGHT SECTIONCORNER SECTION

RECTANGULARCARRYING WAY FOR

TAB CHAINBEVEL CARRYING WAYFOR BEVELED CHAINS

RECTANGULARCARRYING WAY FOR

BEVEL OR TAB CHAINS

CHAIN

CARRYING WAY

CARRYING WEAR STRIP

GUIDE RAIL

RETURN WAY

RETURNWEAR STRIP

CHAIN

SLIDINGRETURN WAY

BROKEN CONTACTRECTANGULAR

RETURN WAYBEVEL

RETURN WAY

STRAIGHT SECTIONONLY

CORNER and STRAIGHTSECTION

FOR TAB CHAINS ONLY

CORNER SECTION ONLYFOR BEVELED CHAINS

The simplicity of the sideflex chain concept eliminates the

need for corner transfers; turntables, dead-plates and

attendant machinery. Rex® sideflexing conveyor chains solve

those conveyor problems where high speed transfers of

product was once a hazardous risk at best - where mass

handling to single-line conveying was a perplexing problem -

where plant layout was sacrificed for lack of design flexibility.

The illustration below shows the basics of a simple sideflexing

conveyor design. Other specifics are shown on Pages 4-8,

TableTop®. Consult Rexnord for additional information:

speeds, inclines, guide rails, etc.; to suit your particular needs.

Guide clearance, space between wear strips for proper chain

tracking.

SIDEFLEXING

CHAIN

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Rex® Engineering Manual TT-3

STRAIGHT RUNS

(For straight running sideflexing (Bevel Tab) chains)

SLIDING RETURN WAY ROLLER

'SE RPE NTI N E STYLE" RETURN WAY

MOUNTING BRACKET

INSIDE OF TURN

CORNERS

BEVELED CHAIN

'

OF TURN

MULTIPLE STRAND CORNERS

TYPICAL

TAB CHAIN

MINIMUM CLEARANCE

GC* CURVE

INSIDE

TURN

TYPICAL

INSIDE

OF TURN

Note: Dimensions subject to change. Certified dimensions of ordered material furnished on request.

&&

INSIDE

1/8" MINIMUM CLEARANCE

1/4" MINIMUM CLEARANCE

1/8" MINCLEARANCE

1/8" MINCLEARANCE

1/8" MINCLEARANCE

1/4" MINCLEARANCE

1/4" MINCLEARANCE

1/4" MINCLEARANCE

MOUNTING BRACKET

1/16" CLEARANCE

SAFETYRAIL

3/8"

1/16" - 1/8" TYPICAL

1/16" - 1/8" TYPICAL

*Guide clearances, straight and curve, are shown on individual chain listing pages.

STRAIGHT RUNS

(For straight running sideflexing (Bevel Tab) chains)

SLIDING RETURN WAY ROLLER

'SE RPE NTI N E STYLE" RETURN WAY

MOUNTING BRACKET

INSIDE OF TURN

CORNERS

BEVELED CHAIN

'

OF TURN

MULTIPLE STRAND CORNERS

TYPICAL

TAB CHAIN

MINIMUM CLEARANCE

GC* CURVE

INSIDE

TURN

TYPICAL

INSIDE

OF TURN

Note: Dimensions subject to change. Certified dimensions of ordered material furnished on request.

&&

INSIDE

1/8" MINIMUM CLEARANCE

1/4" MINIMUM CLEARANCE

1/8" MINCLEARANCE

1/8" MINCLEARANCE

1/8" MINCLEARANCE

1/4" MINCLEARANCE

1/4" MINCLEARANCE

1/4" MINCLEARANCE

MOUNTING BRACKET

1/16" CLEARANCE

SAFETYRAIL

3/8"

1/16" - 1/8" TYPICAL

1/16" - 1/8" TYPICAL

*Guide clearances, straight and curve, are shown on individual chain listing pages.

RETURN WAYS

CARRYING WAYS

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TT-4 Rex® Engineering Manual

STRAIGHT RUNNING

(Bevel

STRAIGHT SECTION CORNER

WEAR STRIPS

(Tab

CORNER STRAIGHT SECTION

INSIDE OF TURN

listing pages.

Note: Dimensions subject to change. Certified dimensions of ordered material furnished on request.

1" MIN.

SIDEFLEXING

SIDEFLEXING Style)

Style)

GC*

GC*STRAIGHT

GC*CURVE

GC*STRAIGHT

GC*CURVE

CORNER WEAR STRIPS

CORNER WEAR STRIPS

1" MIN. 1" MIN.

1" MIN. 1" MIN.

INSIDE OF TURN

1/8" MINIMUMCLEARANCE

1/4" MINIMUMCLEARANCE

*Guide clearances, straight and curve, are shown on individual chain

CARRYING WAYS

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Rex® Engineering Manual TT-5

CHAIN

SIDE TRANSFERS

OUTFEED CHAIN

VARIABLE WIDTH

DEAD-PLATE TRANSFERS

OUTFEED CHAIN

TURNTABLE TRANSFERS

INFEED

OUTFEED CHAIN

CHAIN

INFEED

1/32" 1/32" 1/32", APPROX.

CHAIN

INFEED

1/32" 1/32"

In the operation of TableTop® chain conveyors, smooth

transfer of the conveyed product from one chain to another

is essential for product protection and prevention of

downtime. The various methods are described below.

Side transfers are the least costly and the preferred method

of product transfer. Although simple in theory, care must be

taken to assure that the chain strands are operating on the

same level or the outfeed chain should be slightly lower.

Guide rail positioning, chain wear strip spacing and chain

speeds must all be adjusted to provide smooth product flow.

A typical dead-plate transfer is shown. For smoothest

operation, the dead-plate should be mounted so that it is

perfectly aligned with or slightly higher than the top surface

of the outfeed chain at the highest chordal position of the

sprocket. It should have a slight bevel and be as narrow as

possible so that the product conveyed transfers on and off

the dead-plate without obstruction.

Flexible dead-plates can "float" with the chordal action of

the chain on the tail sprocket with out producing excessive

wear.

Extreme precautions should be taken to properly install and

adjust dead-plates, particularly rigid dead-plates.

The principles for turntables are basically the same as for

dead-plates. Alignment is vitally important to assure smooth

product transfer. The edge of the turntable is usually beveled.

Turntables should be mounted slightly lower than the infeed

chain and slightly higher than the outfeed chain. This

adjustment should be level to 1/32-inch difference in

elevation.

TRANSFERS

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TT-6 Rex® Engineering Manual

RADII-INCHES

All TableTop® chain conveyors should provide for proper amount

of catenary sag to balance the chain tension which is not

absorbed by the drive sprocket teeth. TableTop® chains should

never be run tight. If chain sag is excessive or increases due to

wear, it should be adjusted, by removing links, to the proper

amount of sag. Take-ups are not recommended. If space does

not permit catenary sag, consult Rexnord Corp.

CATENARY SAG

ENTRY RADIUS

A generous entry radius to the return section should be provided.

This permits the chain to feed smoothly onto the return ways.

This curve radius should be greater than the minimum

backflex radius for the chain.

For TAB chains to be returned on hold-down TABs, it is

recommended that chains be guided onto the return wear strips

using a guide shoe or pan with a generous entry radius greater

than the minimum backflex radius.

At the entry to the return wear strips, provide rounded corners to

prevent catching or snagging of chain flights.

ROLLER RETURNS

As illustrated, instead of sliding returns, chain may be returned on

support rollers or shoes. It is important that the first roller or

support shoe be located far enough away from the head sprocket

to allow for proper catenary sag; dimension "A" should be greater

than the distance between rollers, "B".

The preferred diameter of rollers should be at least two times

greater than the minimum backflex radius for the chain. (Refer to

table "Minimum Backflex Radii"). For example, when used with

820 Series chains, roller diameter should be 3 inches or greater.

Roller and support shoe returns are not recommended for

base roller chain design chains.

TRAVELHEAD

DRIVER150° MIN. WRAP

ENTRY RADIUS

TAIL

CHAIN SAG -- 3" TO 5" WHEN RUNNING

18" TO 20"TYPICAL SPACING

NOTE: 2'-3-1/2" FOR 1843

NOTE: 20-24" FOR BASE ROLLER CHAINS

RETURN WEAR STRIPS

GUIDE WITH PROPERENTRY RADIUS

ENTRYDIRECTION

RELIEF OR RADIUS

ENTRY DIRECTION

Top View

Side View

RETURNWEAR STRIPS

MINIMUM BACKFLEX RADII - INCHES

815

820, 831

821

843

845

963

879, 880

61/2"

11/2"

11/2"

6"

18"

6"

11/2"

881

882

1843

1873

1874

3873

LBP821

LBP882

LBP883

11/2"

11/2"

21/2"

12"

10"

7"

16"

9"

2"

Chain SeriesNumber

Min. BackflexRadius

Chain SeriesNumber

Min. BackflexRadius

USE LAST ROLLER OR AGUIDE SHOE (AS SHOWNABOVE) TO GUIDESIDEFLEXING CHAIN ONTO CORNERRETURN WEAR STRIPS

B B(1 - 2 FT)

A(1.5 X B)

HEADSPROCKET

CORNERWEAR STRIPS

NOTE: Allow for 3873 top plate "kick-up" at headshaft of 0.15-

inches and at tailshaft 0.50-inches.

CATENARY SAG

ENTRY RADIUS

ROLLER

RETURNS

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Rex® Engineering Manual TT-7

A chain rises and falls slightly due to a chordal action as it

enters a drive sprocket, or leaves a tail sprocket. Therefore,

the sprocket should be mounted so that the highest point of

the sprocket is no higher than the top of the carrying way

wear strip, otherwise the chain will rise out of the carrying

way. The distance from the end of the wear strip to the

sprocket shaft centerline should equal dimension "B", or the

wear strip will interfere with the free articulation of the chain

as it enters the sprocket. Also, the leading edges of the wear

strip should be beveled.

The following formula and dimensions used in conjunction

with the figure will give the recommended positioning of the

sprocket in relation to the top of the wear strips.

WAYC *

B

TOP OF WEAR STRIP

A +1/32 -.000

WEAR STRIP

· Recommended distance from chain C to top of wear stripL

0.094

0.109

0.125

0.141

0.188

0.234

0.266

0.406

0.438

0.468

831

879

815, 820, 821, LBP821, 881

880

882, LBP882, LBP883

843, 845

1843

863, 864, 963, 1873, 3873, 4873

1874, 4874

279

C Values Chain Series Numbers

C = Dimension Values

For Conventional Chains:

A = (Pitch Diameter) + C

B = Dimensional Values

2

Chain Series NumbersB Values. Inches

1

1-1/2

843, 845, 1843

815, 820, 821, 831, 963, 864, 879, 880, 881, 8821873, 1874, 3873, LBP821, LBP882, LBP883

The idler wheel can be used in place of tail sprockets on

TableTop® one-piece link chain conveyors only. They are

made of an engineering plastic material; are self-lubricating,

and are resistant to most chemical solutions and corrosive

environments. In existing conveyors, the idler wheel can be

installed with only minor conveyor adjustments. Simply take

off the tail sprocket and remove any burrs or sharp edges

from the shaft. Using two set collars, place the idler wheel on

the shaft, space and tighten the set collars. For proper

location and smooth operation, the idler wheel should be

mounted slightly below the top of the wear strips.

Note: Do not use idler wheels with base roller chain design chains.

RECOMMENDED

SET COLLAR

CLEARANCE

1/32"

IN CORROSIVE

ENVIRONMENT

STAINLESS STEEL

SHAFTING RECOMMENDED

**

1-1/2"

A * 1/32

.000

In new conveyors, the idler wheel can easily be incorporated

into the conveyor frame. The shaft does not have to rotate,

therefore bearings are not required.

* Distance from centerline of idler wheel shaft to the chain top plate support surface.

** For abrasive applications, allow at least 3 inches.

"A" Values -- Inches

21T Idler Wheel 23T Idler Wheel 25T Idler Wheel 27T Idler Wheel

2.700 2.940 3.170 3.410

SPROCKET &

WEAR STRIP

POSITIONING

IDLER WHEEL

LOCATION &

POSITIONING

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TT-8 Rex® Engineering Manual

SERPENTINE STYLE RETURN FOR OR

FULL WIDTH RETURN FOR USE WITH OR

TAB STYLE RETURN FOR AND CHAINS

·Sprocket and Wear Track Positioning

Dimension "A" is the dimension from the centerline of the

sprocket to the top of the wear track.

For LBP821 "A" = (P.D. + 0.125) (P.D. = Pitch Diameter)

2

For LBP882 and LBP883 "A" = (P.D. + 0.19)

2

__

+1/32 -0

__+1/32 -00

Dimension "B" is the dimension from the centerline of the

sprocket to the end of the wear track.

· Transfer Plate Positioning

Dimension "C" is the dimension from the centerline of the

sprocket to the top of the transfer plate.

"C" = ("A" + 7.5)+0-1/32

"C" "A"

"B"(1-1/2" -- 2")

(2" -- 4")

(20" -- 24")

MINIMUM ENTRY

RADIUS "R"

Chain No.In. mm

"R"

LBP821LBP882 TABLBP883

1692

406 229 51

FULL WIDTH SLIDING RETURN FOR USEWITH LBP821, LBP882 TAB, OR LBP883 TAB

SERPENTINE STYLE RETURN FORWITH LBP821, LBP882 TAB, OR LBP883 TAB

TAB STYLE RETURN FOR LBP882 TAB AND LBP883 TAB

Side View Top View

LBP CHAIN

SPROCKET

& WEAR STRIP

POSITIONING

RETURN

CONSTRUCTION

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Rex® Engineering Manual TT-9

An intermediate drive allows a continuous strand of conveyor

chain to operate at longer conveyor centers than possible with a

single drive. Each intermediate drive operates in such a way that

the same strand of chain continues on past the drive to the next

drive.

Two intermediate drive arrangements are:

Tangential Drive

Offset Wrap Drive

TANGENTIAL DRIVE

With this approach the chain, while operating in a straight line, is

engaged by the drive sprocket in a manner similar to a rack and

pinion. Although this approach has a certain degree of simplicity

it has a few shortcomings. First, the entire conveyor system must

be run tight to insure that the chain doesn't "bunch up" after

exiting the sprocket. Second, the chain tends to eject outward

from the sprocket tooth, particularly under high peak loads.

Contact Rexnord Corp. for additional comments.

OFFSET WRAP DRIVE

Unlike a tangential drive, this approach is limited to chains having

sideflexing capability.

Essentially, the unabsorbed chain tension (as well as excess

chain) at the drive sprocket is compensated for by a catenary.

The chain the engages an idler (tail) sprocket or wheel and then

continues on as a carry strand.

OFFSET DRIVE

BASIC DRIVE CONCEPT

DIRECTION OF TRAVEL

GUIDE SHOE

GUIDE SHOE

INLINE TRANSFER

DRIVESPROCKET

IDLERSPROCKET

CURVED SECTION (S)

CATENARY -- accommodates excess chain and balances drivesprocket absorbed tension.

SIDE TRANSFER

DRIVESPROCKET

IDLERSPROCKET

CATENARY -- accommodates excess chain and balances drivesprocket absorbed tension.

SHOES -- (optional) to insure that chain properly disengages drivesprocket and engages idler sprocket.

INTERMEDIATE

DRIVE

ARRANGEMENTS

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TT-10 Rex® Engineering Manual

Rex® MatTop®

EngineeringManual

Wear Strip Material Selection

Proper chain and wear strip selection will provide

optimum chain and wear strip life. Friction and wear

resistance are two factors which should be considered

when selecting a wear strip material.

1. The lower the coefficient of friction between the chain

and wear strip, the longer the chain life.

2. The greater the wear resistance of the chain and wear

strip materials, the longer the chain life and wear strip

life.

Of course, the combination of chain tension, top load,

type of lubrication, abrasion, and speed of a given

conveyor will govern the final wear rate of a particular

chain-wear strip combination. The worst condition is high

speed, dry operation.

Rexnord has accumulated many years of application

experience as well as laboratory test data on chain-wear

strip compatibility. The following general guideline will

help in the selection wear strip materials.

Metal Wear Strips

Metal wear strips are harder than non-metallics, and in

addition can be heat treated or work hardened to

increase hardness. They are, therefore, suited for

applications where abrasive particles are present either

from the environment or from the products carried.

Abrasive particles are less likely to embed in metal wear

strips.

For non-corrosive environments, plain carbon steel , cold

finished, is recommended. For corrosive environments,

use stainless steel, one quarter temper minimum (25 Rc),

cold finish.

SELECTION PROCEDURE

Application Information

If properly selected and applied, chain will wear out in

service before it breaks from fatigue.

Selection of the proper chain for a specific application

requires that all of the following information be known:

· Conveyor length

· Conveyor width

· Wear track material

· Top load (weight per square foot or weight per square

meter)

· Chain speed (feet per minute or meters per minute)

· Operating conditions (dry or lubricated)

· Environment (abrasiveness, temperature, chemical

activity, etc.)

· Accumulation requirements (slippage)

· Attachments required

· Type of transfer plate

Chain Material Selection

Besides temperature and strength factors, ir is important

to consider chemical, wear and impact resistance.

Chemical resistance should be considered for

applications where bleach, acid, etc. are present. HT and

LT materials have the best chemical resistance. Always

consult the chemical resistance chart (Page 4, MatTop®)

or Rexnord if unsure about material - chemical

compatibility. Consider pin material resistance, too.

Impact resistance can be obtained from the LT material.

Moderate to severe impacts are easily handled by LT

whereas LF and HT materials offer small to moderate

resistance.

SELECTION

PROCEDURE

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MT-1 Rex® Engineering Manual

STEEL

Plain carbon, cold rolled steel is recommended. Surface

finish should be 32-63 RMS. Use heat treatable grades

where available and hardened to 25-30 Rc. Lubricants

used should have rust inhibitors added.

STAINLESS STEEL

Cold rolled finish (32-63 RMS) is recommended. An

austenitic grade offers the best corrosion resistance.

The softer annealed grades of austenitic stainless steel are

NOT RECOMMENDED, especially with thermoplastic

chains. Interaction between the chain material and the soft

stainless steel might develop. When this happens, the

resulting wear debris consists almost entirely of finely

divided stainless steel particles, nearly black in color, similar

to molydisulfide or graphite. The wear of the stainless steel

might be rapid while the thermoplastic chain by contrast

exhibits only slight wear.

Therefore, ONE QUARTER TEMPER (MINIMUM 25 Rc.)

austenitic grade stainless is recommended for use with

any of the chain materials, but especially with

thermoplastic. Martensitic stainless steels can also be

used. They offer excellent wear resistance when heat

treated to 25-35 Rc, but they are not as corrosion

resistant at austenitic.

BRONZE AND BRASSES

A hard temper material is recommended since a soft bronze

wears rapidly. Typical applications calling for these metals

are those which require non-sparking and anti-static

conditions. These materials are generally not

recommended.

ALUMINUM

Not recommended due to poor wear resistance.

NON-METALLIC WEAR STRIPS

Non-metallic wear strips have a lower coefficient of friction

than metals. They are generally easier to install and remove

and provide for quieter operation. Ultra high molecular

weight polyethylene is the most commonly used wear strip

material.

ULTRA HIGH MOLECULAR WEIGHT

POLYETHYLENE UHMWP

UHMWP polyethylene (molecular weight of at least 1.0

million) is recommended for both dry and wet applications.

UHMWP is virtually unaffected by moisture and is resistant

to corrosive chemicals. It is not very rigid and may deflect

when subjected to high loads. UHMWPE is not

recommended for abrasive conditions where particles may

embed in the surface and wear the chain.

TEFLON

This material has perhaps the lowest coefficient of friction

available in a plastic wear strip material. It is soft and tends

to flow off the surface and is not practical as a wear strip

material except in low load - low speed applications.

SELECTION

PROCEDURE

cont.

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Rex® Engineering Manual MT-2

since it does not require machining for bearings. Hence,

this is the least expensive bore or shaft choice.

Square or hex bore sprockets are best suited for high or

low temperature applications. Since thermoplastic chains

will expand or contact with large temperature swings, it is

important that the sprockets be able to move along the

shaft to follow the chain. Only one or more of the

sprockets need to be locked to the shaft to track the

chain; the remaining sprockets may float.

Sprocket material is also an important consideration

especially in the presence of chemicals, abrasives, or

high temperatures. Consult Rexnord for more

information.

Sprocket and Bore Style Selection

Choose the largest sprocket pitch diameter possible

since this will give the greatest chain life. Larger pitch

diameter sprockets cause less chain articulation thus

producing less pin-joint wear. High speed conveyors are

applications where larger pitch diameter sprockets are

desired.

High load applications should also favor larger pitch

diameter sprockets because these sprockets will give

more tooth-chain contact and distribute the load more

evenly.

General conveying applications may use most sprocket

sizes. Product transfer, transfer distance, or retrofit

applications will dictate the sprocket size in most cases.

Round bore sprockets are most commonly used. Round

shafting has a distinct advantage over square shafting

SELECTION

PROCEDURE

cont.

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MT-3 Rex® Engineering Manual

CORROSION RESISTANCE GUIDE- CHAIN AND WEAR STRIP MATERIALS

Common or Chemical Name

Solutions contained in the product conveyed as well

as solutions used to clean or lubricate the chain and

equipment may result in corrosive attack of chain

and tracks. Chain and track material have varying

degrees of resistance to corrosion. Use this guide to

help you select chain materials for various corrosive

environments.

With LF/Acetal thermoplastics, do not use cleaning

or lubricating agents with a pH below 4 or above 10,

or chemicals containing chlorine or free ammonia.

These agents may cause immediate attack or

"crazing" after several applications due to

concentration by evaporation.

This table is based on data available by suppliers of

the various materials. For those chemicals with a

marginal or unsatisfactory rating - or for chemicals

not included - contact Rexnord for

recommendations.

Steel

Nylon

and

Nylatron®Austenitic

Series

Ferritic*

and

Martensitic

Series

LF

Acetal

and

Acetal

Chemically

Resistant

Plastic

(P)

Ultra High

Molecular

Weight

Polyethylene

(UHMWPE)

Poly-

propylene

(HT)

Poly-

ethylene

(LT)

(DATA BASED UPON 68°f)

Acetic Acid (over 5%-up to 50%

Acetone

Alcohol

Ammonia

Beer

Beverages-Soft Drinks

Benzene

Brine (pickle)

Carbon Tetrachloride

Chlorine

Citric Acid

Cyclohexane

Ethyl Chloride

Formaldehyde

Formic Acid

Fruit Juices

Gasoline

Hexane

Hydrochloric Acid (up to 2%)

Hydrochloric Acid (up to 37%)

Hydrogen Peroxide

Iodine

Isopropanol (isopropyl alcohol)

Kepodene

Lactic Acid

Methylene Chloride

Milk

Muriatic Acid

Nitric Acid (low concentrations)

Oil (vegetable or mineral)

Paraffin

Phosphoric Acid (up to 10%)

Soap and Water

Sodium Chloride

Sodium Hydroxide (up to 25%)

Sodium Hypochlorite (Bleach)

Stearic Acid

Sulphuric Acid (up to 40%)

Toluene (Toluol)

Turpentine

Vegetable Juices

Vinegar

Water (fresh)

Whiskey

Wine

Xylene

U

U

S

M

S

S

S

U

M

U

U

S

U

S

U

U

U

U

S

S

U

S

U

U

S

S

U

M

U

U

U

U

U

S

M

U

U

S

S

S

M

S

S

S

S

S

S

M

S

U

M

S

S

U

S

U

U

U

U

S

S

M

S

U

U

S

S

U

S

S

U

U

S

U

S

S

S

S

S

S

S

S

M

S

S

S

S

S

S

M

M

U

S

S

S

U

S

S

S

U

U

S

U

S

S

S

S

U

U

S

S

S

S

M

S

U

S

U

S

S

S

S

S

S

S

S

U

S

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S

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S

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U

M

U

M

S

U

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S

U

U

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U

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S

U

S

U

U

S

S

U

S

U

S

U

S

U

S

S

U

S

S

S

S

U

S

S

U

S

S

S

M

S

U

M

S

S

S

U

S

S

S

U

U

U

U

S

S

S

S

S

U

U

S

S

U

S

S

S

U

M

U

M

S

S

S

S

S

S

S

S

S

S

S

S

S

M

S

M

S

S

U

M

S

S

M

U

U

S

S

S

M

S

M

S

U

S

S

S

S

S

S

S

S

S

S

S

S

U

U

S

S

S

S

S

M

S

S

S

S

S

S

M

S

M

S

S

U

M

S

S

M

S

S

S

M

S

M

S

S

S

S

S

M

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

U

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

U

S

S

S

U

S

S

S

S

S

S

S

S

U

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

M

S

M

S

S

U

M

S

S

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U

U

S

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S

M

S

M

S

U

S

S

S

S

S

S

S

S

S

S

S

S

U

U

S

S

S

S

S

M

SELECTION

PROCEDURE

cont.

Chemical

Corrosion

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Rex® Engineering Manual MT-4

TABLE 1 FRICTION FACTORS BETWEEN CHAIN AND WEAR TRACKS (Fw).

Friction Factors Between Chain And Weatherstrips (Fw)

Wear strip Material

Chain MaterialLubrication

Condition

Carbon And

Stainless

Steel

UHMWP and

Nylatron®

LF Acetal

Dry

Water

Soap & Water

Oil

Dry

Water

Soap & Water

Oil

Dry

Water

Soap & Water

Oil

Dry

Water

Soap & Water

Oil

HP Acetal

LT

(Polyethylene)

HT

(Polyethylene)

0.25

0.20

0.15

0.10

0.20

0.18

0.15

0.10

0.22

0.20

0.15

0.10

0.18

0.16

0.14

0.10

0.28

0.22

0.15

0.10

0.23

0.20

0.15

0.10

0.35

0.25

0.20

0.10

0.30

0.25

0.20

0.10

Note: For Roller Support, fw = 0.10

Friction Factors Between Chain And Products (Fm)

Chain Type and Material

Product Material

Lubrication

Condition

Plastic(Including PET)

DryWater

Soap & Water

Dry

DryWater

Soap & WaterOil

TABLE 2 FRICTION FACTORS BETWEEN CHAIN AND PRODUCTS (Fm).

DryWater

Soap & Water

DryWater

Soap & Water

DryWater

Soap & Water

DryWater

Soap & Water

Paper

Steel

Aluminum

Glass

ReturnableGlass Bottles

Non-ReturnableGlass Bottles

LF Acetal LF Acetal HP AcetalLT

PolyethyleneLT

PolyethyleneHT

Polyethylene

HTPolyethylene

Solid andPerforated Top

Solid andPerforated Top

Solid andPerforated Top

Raised Top Raised Top Raised TopSolid and

Perforated Top

0.20

0.18

0.15

0.18

0.14

0.10

0.18

0.16

0.14

0.22

0.19

0.15

0.19

0.16

0.12

0.30

0.25

0.20

0.24

0.20

0.16

0.30 0.22 0.25 0.30 0.25 0.35 0.28

0.25

0.20

0.15

0.10

0.16

0.14

0.10

0.08

0.18

0.16

0.13

0.10

0.28

0.22

0.15

0.10

0.25

0.18

0.12

0.08

0.35

0.25

0.20

0.10

0.28

0.20

0.16

0.08

0.20

0.15

0.12

0.13

0.11

0.08

0.18

0.14

0.12

0.22

0.17

0.12

0.20

0.14

0.10

0.28

0.19

0.16

0.22

0.15

0.13

0.15

0.13

0.10

0.12

0.10

0.08

0.14

0.12

0.10

0.18

0.14

0.10

0.14

0.11

0.08

0.22

0.17

0.10

0.20

0.15

0.10

0.20

0.16

0.14

0.16

0.12

0.11

0.18

0.16

0.14

0.27

0.17

0.14

0.19

0.14

0.11

0.29

0.21

0.14

0.27

0.18

0.14

0.15

0.13

0.10

0.12

0.10

0.08

0.13

0.11

0.10

0.18

0.14

0.10

0.14

0.11

0.08

0.22

0.17

0.10

0.20

0.15

0.10

Product Weight Formulas, Round Products Only

Formula for finding number of round containers per square foot (square meter) during fully packed conditions:

Containers per square foot = 166.277 Containers per square meter = 1.15 x 106

D = Container diameter, inches (mm)

D2 D2

SELECTION

PROCEDURE

cont.

Chain Tension

Calculations

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MT-5 Rex® Engineering Manual

TYPICAL CONVEYOR CONSTRUCTION

VIEW A- A GUIDE CLEARANCE

CHAIN WIDTH + "A"

Figure 9 - Typical Conveyor Construction

A

A

Calculation of guide clearance "GC" for

MatTop® Conveyors

For conveyors operating at room temperature

(70°F to 21°C);

GC = actual chain width + A (see Table 4 for A)

For conveyors operating at elevated

temperatures one must take thermal

expansion of the chain into account.

The actual width will increase by an

amount that is dependent upon

temperature, chain width, and the

coefficient of thermal expansion of

the plastic.

The coefficient of thermal expansion is:

C Thermal = 0.001 in (0.15 mm) Expansionor

m · °CFt · °F

Dimension "A" Conveyor Length

3/8

5/8

3/4

Up to 30'

30' - 50'

Over 50'

TABLE 4 STANDARD CONVEYOR

GUIDE CLEARANCE

Calculation of "GC" at Elevated Temperatures

Assume a 12ft. wide, 45 ft. lone pasteurizer

operating at an average temperature of 190°F.

1. The increase in the width ( W) due to the

temperature of 190° can be found as shown:

W = W (chain width in Ft or m)

x CThermal Expansion

x T (Temp. diff. from room

temp. of 70°F, 21°C)

W = [12 ft.] x [0.001 in]

x [190°F - 70°F]

Ft · °F

W = 1.44 in.

2. Allow for the standard clearance, "A",

based upon conveyor length. The conveyor

in the example is 45 ft. long. Table 4 gives

"A" = 5/8 in for conveyors between 30 ft. and 50 ft.

3. The total "GC" for this example is:

GC =12ft. (chain width@ 70°F)

+1.44 in. (expansion due to temperature)

+ 5/8 in. (standard clearance)

GC = 144 in. + 1.44 in. + 0.625 in.

GC = 146.065 146 1/16 in.~~

1.

2.

SELECTION

PROCEDURE

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Conveyor

Design and

Construction

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Rex® Engineering Manual MT-6

Carry Way Supports

, TYP

Figure 10 Offset Rail

0 0

0 0 0

0 0 0 0

0 0 0

0 0 0 0

0 0 0

0 0 0 0

0 0 0

0 0 0 0

Figure 12 Solid Bed

NOTE: Openings should be provided for debris to escape. Not recom- mended for wet applications since a "suction" can be created between the chain and bed, especially if used as a return support.

CHAIN

CHAIN WIDTH

Figure 11 Cheveron or Herring Bone

Figure 13 Roller Supports

NOTE: The rollers must be rigid enough to

resist deflection. Roller beds are not suitable for all chains or applica- tions. Contact Rexnord for additional information.

3/4" Pitch Chains

1 1/2" Pitch Chains

2 1/4" Pitch Chains

DRef. = 1 1/2"

SRef. = 1 5/8"

DRef. = 2"

SRef. = 2 1/8"

DRef. = 2 1/2"

SRef. = 2 5/8"

6" TYP

2" TYP

CHAIN WIDTH

C CFL

6" TY

P

2" TY

P

D

S

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

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MT-7 Rex® Engineering Manual

Return Way Supports - chain without attachments

Figure 14 Full-Width Rollers, Thermoplastic, Rubber or Metal.

I

Figure 15 Staggered Rollers, or Rubber.

NOTE: The supports shown in the carry way section may also be used for return way supports.

Return Way Supports - chain with attachments

CHAIN WIDTH

Thermoplastic

1 1/2" MIN.

6"

MIN

.

1 1/2" MIN.

6"

MIN

.

Figure 16 Serpentine, Plastic Extrusions or Metal Rod.

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

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Rex® Engineering Manual MT-8

Figure 20 Catenary Tension and Sag

CATENARY TENSION CATENARY SAG

All Rex® MatTop® and TableTop® chains, operate

under true chain principles irrespective of load,

speed or conveyor length. A catenary is all that is

required for proper chain-sprocket interaction.

The catenary is a given length of chain which is left

unsupported in the return side of the conveyor. The

weight of this unsupported chains produces the

tension necessary to keep the chain wrapped on the

sprocket. Additionally, the catenary provides a place

for excess chain from elongation to accumulate.

The catenary should be directly after the drive or as

close as possible.

Rexnord never recommends chain take-up devices

except for the following cases:

adjustment of catenary sag to maintain proper

tension

unconventional conveyors where a catenary is

not practical (i.e. conveyors that are vertical or

tilted to the side, 90° from horizontal).

adjustment of shaft perpendicularity to maintain

proper chain tracking.

When a take-up or tensioning device is required to

keep a chain under constant tension Rexnord

recommends that a spring loaded or similar

tensioner be used.

Premature failure may result from an over

tensioned chain.

NOTE: The following equations relate

tension, excess chain, catenary sag and

catenary length.

Catenary Purpose and Design

T = B2 x W W x CS+ [ENGLISH]

96 CS 12

T = B2 x W W x CS+ [METRIC]

799 CS 102

CS = .375 BE [ENGLISH OR METRIC]

Where: CS = Catenary sag (inches or mm)

L = return strand length (inches or mm)

B = center distance (inches or mm)

E = excess chain, L - B (inches or mm)

Where: T = Chain tension due to catenary sag

(lbs/ft or N/m)

B = Center Distance (inches or mm)

W = Weight of chain (lbs/ft2 or kg/m2)

CS = Catenary sag (inches or mm)

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

cont.

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MT-9 Rex® Engineering Manual

Conveyor Design and Construction

CHAIN BACKFLEX RADII AND CATENARIES

Chain No. Min. Radius (mm)

591 2

21 00 1

1-1/2

1-1/2

4707 2

1-1/2

1

5966 1-1/2

1-1/2

5997 2-3/4

6085 2

TABLE 5 MINIMUM BACKFLEX RADIUS

Figure 21 Conveyors with up to 40' centers and top load up to 15 ft.

I

Figure 22 Conveyors with up to 60' centers and top load up to 20 ft.

I

Figure 23 Conveyors with longer than 60' centers and top load in excess of 20 ft.

ALTERNATE CATENARY ARRANGEMENTS

Incline Conveyors

Chain No. Min. Radius (mm)

2100

4705/5705

4706/5706

4707

5935/5936/6938

5966

5995/5996

5997

6085

1

1 - 1/2

1 - 1/2

2

1

1 - 1/2

1 - 1/2

2 -3/4

2

(25)

(38)

(38)

(51)

(25)

(38)

(38)

(70)

(51)

TABLE 5 MINIMUM BACKFLEX RADIUS Figure 22 Conveyors with up to 60' centers and top

load up to 20 lbs./sq ft.

Figure 21 Conveyors with up to 40' centers and top

load up to 15 lbs./sq ft.

Figure 23 Conveyors with longer than 60' centers

and top load in excess of 20 lbs./sq ft.

Incline Conveyors

Figure 24 Incline Conveyors

SPROCKETS

TAKE UP

2" - 5"

36" TO 48"

C S

PK

TL

(SPROCKET O.D.)2MIN.

C S

PK

TL

24" TO 36"

2" - 5"2" - 5"

C S

PK

TL

48" TO 60"(SPROCKET O.D.)2MIN.

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

cont.

Rex

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Rex® Engineering Manual MT-10

D

................ .................. .

Figure 25 Standard transfer plate mounting

TABLE 6 FLAT TRANSFER PLATE MOUNTING DIMENSIONS (PD = pitch diameter)

HEAD AND TAIL END CONSTRUCTION

dimensions

A

C

Transfer plate positioning - head and tail

Dimension "A" is the dimension from the

centerline of the sprocket to the top of the

wear track.

Dimension "B" is the dimension from the

centerline of the sprocket to the centerline of

the mounting holes for comb style transfer

plates. (See Page, 12 MatTop®).

Dimension "C" is the dimension from the

centerline of the sprocket to the end of the

supporting wear track.

Dimension "D" is the dimension from the

centerline of the sprocket to the top of the

transfer plate.

Chain No. A (mm) C* (mm) D (mm)

5935/5936

6938

6085

5995/5996

4705/4706/5966 5705/5706

2100

(PD) - 0.17 (4.3)

(PD) - 0.17 (4.3)

(PD) - 0.31 (7.9)

(PD) - 0.36 (9.1)

(PD) - 0.25 (6.4)

(PD) - 0.17 (4.3)

2

2

2

2

2

2

0.75 (19.1)

0.75 (19.1)

2.00 (50.8)

2.25 (57.2)

1.50 (38.1)

1.0 (25.4)

(PD) - 0.17 (4.3)

(PD) - 0.23 (6.0)

(PD) - 0.44 (11.1)

(PD) - 0.36 (9.1)

(PD) - 0.25 (6.4)

(PD) - 0.17 (4.3)

2

2

2

2

2

2

NOTE: TOLERANCES

A: -0, +1/32 (+0.80)

C: -0, +1/4 (+6.35)

D: -1/32 (-0.80), +0

*Above values good only for sprockets

mounted between support tracks. For

sprockets mounted in line with support

tracks:

C =O.D.

2( )2- (A-t) + 0.125

2

D

................ .................. .

Figure 25 Standard transfer plate mounting

TABLE 6 FLAT TRANSFER PLATE MOUNTING DIMENSIONS (PD = pitch diameter)

HEAD AND TAIL END CONSTRUCTION

dimensions

A

C

Transfer plate positioning - head and tail

Dimension "A" is the dimension from the

centerline of the sprocket to the top of the

wear track.

Dimension "B" is the dimension from the

centerline of the sprocket to the centerline of

the mounting holes for comb style transfer

plates. (See Page, 12 MatTop®).

Dimension "C" is the dimension from the

centerline of the sprocket to the end of the

supporting wear track.

Dimension "D" is the dimension from the

centerline of the sprocket to the top of the

transfer plate.

Chain No. A (mm) C* (mm) D (mm)

5935/5936

6938

6085

5995/5996

4705/4706/5966 5705/5706

2100

(PD) - 0.17 (4.3)

(PD) - 0.17 (4.3)

(PD) - 0.31 (7.9)

(PD) - 0.36 (9.1)

(PD) - 0.25 (6.4)

(PD) - 0.17 (4.3)

2

2

2

2

2

2

0.75 (19.1)

0.75 (19.1)

2.00 (50.8)

2.25 (57.2)

1.50 (38.1)

1.0 (25.4)

(PD) - 0.17 (4.3)

(PD) - 0.23 (6.0)

(PD) - 0.44 (11.1)

(PD) - 0.36 (9.1)

(PD) - 0.25 (6.4)

(PD) - 0.17 (4.3)

2

2

2

2

2

2

NOTE: TOLERANCES

A: -0, +1/32 (+0.80)

C: -0, +1/4 (+6.35)

D: -1/32 (-0.80), +0

*Above values good only for sprockets

mounted between support tracks. For

sprockets mounted in line with support

tracks:

C =O.D.

2( )2- (A-t) + 0.125

2

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

cont.

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MT-11 Rex® Engineering Manual

Chain No.

A

A B D T

D

Figure 26 Comb Transfer Plate Mounting Dimensions

Comb transfer plate

COMB TRANSFER PLATE MOUNTING

A = C/L OF SHAFT TO TOP OF WEAR STRIP

B = C/L OF SHAFT TO CENTER OF MOUNTING SLOT

C = C/L OF SHAFT TO BEGINNING OF WEAR STRIP

D = C/L OF SHAFT TO TOP OF TRANSFER PLATE

T = THICKNESS OF TRANSFER PLATE

T

C

4707

5997

(PD) - 0.25 (6.4)

(PD) - 0.36 (9.1)

2

2

3.25 (82.6)

3.25 (82.6)

1.50 (38.1)

2.25 (57.2)

(PD) - 0.50 (12.7)

(PD) - 0.61 (15.5)

2

2

0.25 (6.4)

0.25 (6.4)

TABLE 7 COMB TRANSFER PLATE MOUNTING DIMENSIONS

NOTE: TOLERANCES

A: -0, +1/32 (+0.80)

C: -0, +1/4 (+6.35)

D: -1/32 (-0.80), +0

NOTE: "B" dimension is flexible. One must

insure that comb figures extend beyond

sprocket centerline to avoid transfer problems.

* Mounting sprockets in line with

wear strips is not recommended for

chains using comb transfer plates.

C B

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

cont.

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Rex® Engineering Manual MT-12

STEP 2

Low Temperature Application

Chain Contraction Expected

Figure 27 Comb Transfer Plate Mounting (Low Temperature)

1. Secure the 2 center most transfer plates

as shown.2. Position fasteners in the remaining

transfer plates to the corresponding right

side or left side of the slots to allow for

contraction at low temperatures.

High Temperature Application

Chain Expansion Expected

Figure 28 Comb Transfer Plate Mounting (High Temperature)

1. Secure the 2 center most transfer plates

as shown. These will track the chain.

2. On transfer plates to the left of center,

position fasteners to the left side of the

slot. On the right hand transfer plates,

position fasteners to the right side of the

slot. This arrangement will allow these

transfer plates to move as required to

accommodate changes in chain width

up to 1 - 1.2" (38.1)

For Room Temperature Applications

1. Secure the 2 center most transfer plates

as shown above.2. The transfer plates to the left and right

should have fasteners centered in the

mounting slots.

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

cont.

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MT-13 Rex® Engineering Manual

I I

I

I I

DRIVE

SUPPORT IDLER ROLLERS

CATENARY

ROLLER

BI-DIRECTIONAL CONVEYORS

Figure 29 End Drive Conveyor

The following examples show two methods

of driving a bi-directional conveyor with one drive.

SpanInches(mm)

Sag Inches (mm)

IDLER ROLLER

SPAN

SAG

10 (250)

20 (500)

30 (750)

40 (1000)

50 (1250)

60 (1500)

70 (1750)

80 (2000)

90 (2250)

100 (2500)

110 (2750)

120 (3000)

0.6 (1,77)

1.6 4,81)

3.4 (10,20)

5.8 (17,40)

8.9 (26,70)

12.8 (38,30)

17.3 (52,00)

22.5 (67,70)

28.4 (85,30)

35.0 (105,00)

42.3 (127,00)

50.3 (151,00)

0.6 (1,77)

1.4 (4,22)

2.7 (10,20)

4.5 (13,40)

6.8 (20,40)

9.7 (29,00)

13.1 (39,20)

17.0 (50,80)

21.4 (64,10)

26.4 (79,10)

31.8 (95,20)

37.8 (113,00)

0.6 (1,77)

1.3 (3,92)

2.3 (6,90)

3.8 (11,40)

5.6 (16,80)

7.9 (23,60)

10.6 (31,70)

13.8 (41,30)

17.3 (51,80)

21.3 (63,80)

25.6 (76,60)

30.4 (91,20)

0.7 (2,06)

1.2 3,63)

2.1 (6,30)

3.3 (9,90)

4.8 (14,30)

6.8 (20,40)

9.0 (27,00)

11.6 (34,70)

14.6 (43,80)

17.9 (53,60)

21.5 (64,40)

25.5 (76,30)

0.7 (2,06)

1.2 (3,63)

1.9 (5,70)

3.0 (9,00)

4.3 (12,90)

5.9 (17,70)

7.9 (23,60)

10.1 (30,20)

12.6 (37,80)

15.5 (46,40)

18.6 (55,70)

22.0 (65,80)

0.8 (2,35)

1.2 (3,63)

1.8 (5,40)

2.8 (8,30)

3.9 (11,70)

5.4 (16,20)

7.0 (21,00)

9.0 (27,00)

11.2 (33,60)

13.7 (41,00)

16.4 (49,10)

19.4 (58,10)

0.9 (2,65)

1.2 (3,63)

1.8 (5,40)

2.6 (7,70)

3.6 (10,80)

4.9 (14,70)

6.4 (19,10)

8.2 (24,50)

10.1 (30,20)

12.3 (36,80)

14.8 (44,30)

17.4 (52,00)

0.9 (2,65)

1.3 (3,92)

1.8 (5,40)

2.5 (7,50)

3.4 (10,20)

4.6 (13,70)

5.9 (17,70)

7.5 (22,50)

9.3 (27,90)

11.3 (33,80)

13.4 (40,10)

15.8 (47,40)

1.1 (3,34)

1.3 (3,92)

1.8 (5,40)

2.4 (7,20)

3.2 (9,60)

4.1 (12,30)

5.3 (15,90)

6.6 (19,70)

8.0 (23,90)

9.7 (29,00)

11.5 (34,40)

13.5 (40,40)

3.0 (75) 4.0 (100) 5.0 (125) 6.0 (150) 7.0 (175) 8.0 (200) 9.0 (225) 10.0 (250) 12.0 (300)

TABLE 8 - (T) CATENARY TENSION - POUNDS (NEWTONS) FOR CHAIN WEIGHINGONE POUND PER FOOT2 (OR ONE KILOGRAM PER METER2)

The end drive method is recommended for light duty service

(10'-20' centers) on conveyors where the chain tension on

the carry side can be balanced by the catenary tension. Use

Table 8 to calculate catenary tension "T". This tension must

be equal to, within 5%, the carry side chain tension for proper

operation.

In addition, when calculating chain tension per foot of width,

use twice the calculated carry side chain tension to

determine chain load carrying capability. This is adjusted

chain tension. This is to allow for chain tension in the

catenary section, that is equal to carry side chain tension.

For determining horsepower, use standard tension, (CT).

Example:

Conveyor length = 12 ft.; top load - 11 lb./ft.2,

chain = LF5997 @ 3.4 lb./ft.2; calculated chain

tension = 43 lb./ft. of width. Therefore, catenary

tension (T), should equal 43 lbs. "T", from Table

8, is multiplied by the chain weight to determine

span length and depth required. The minimum "T"

from Table 8 required to get 43 lb. tension is 12.8,

(12.8 x 3.4 = 43.5).

This corresponds to a 60" span and a 3" sag. Other

combinations are possible.

For applications beyond the capacity of the end

drive method, use the bottom drive arrangement.

SELECTION

PROCEDURE

cont.

Conveyor

Design and

Construction

cont.

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Rex® Engineering Manual MT-14

IDLER ROLLER

DRIVE BOTTOM

BI-DIRECTIONAL CONVEYORS, CONT.

SUPPORT ROLLERS

2' - 3' (0.51M) spacing, depending on speed and other

considerations.

IDLER ROLLERS

The idler rollers can be continuous drums or a series

of individual rollers. However, if individual rollers are

used, they should be positioned in the same location

as the drive sprockets. Note that on each shaft, each

drive sprocket requires a roller.

Bottom Drive Conveyor

(For heavy-duty service)

Figure 30 Bottom Drive Conveyor

BOTTOM DRIVE

All sprockets must be keyed in-line.

END TERMINALS

For single strand, continuous width conveyors, key at

least two sprockets, preferably the outer most

sprockets.

For conveyors using multiple strands of chain, key the

sprockets for one of the strands only - preferably the

center strand.

Sprocket Requirements and Location

4705/4706/4707 AND

5705/5706 CHAINS

Use (2) sprockets per foot (7 per meter) of chain width.

If the operating chain tension exceeds 80% of its rated

capacity use (4) sprockets per foot (13 per meter) of

chain width.

5935, 5936, 2100, AND 6938 CHAINS

Use (4) sprockets per foot (13 per meter) of chain

width for loads up to 50% of chain capacity and (6) per

foot (20 per meter) for loading in the 50% - 75%

capacity range.

Loading of more than 75% of the chain's capacity

requires (8) sprockets per foot (26 per meter) of chain

width.

5966, 5995, AND 5996 CHAINS

Use (2) sprockets per foot (7 per meter) of chain width

up to 50% of chain capacity.

Greater than 50% loading requires (4) sprockets per

foot (13 per meter) of chain width.

6085 CHAIN

Use (3) sprockets per foot (10 per meter) of chain

width.

5997 CHAIN

It is very important to use (4) sprockets per foot (13 per

meter) since less sprockets might cause the chain to

sag between sprockets and cause the transfer combs

to be exposed to the transferring product. If transfer

combs are not being used, follow the

recommendations for 5996 chain.

NOTE: Make sure 6938 and 2100 are set up so drive and idle sprockets do not

contact open barrels ("stagger" spkts on 6938).

END TERMINAL END TERMINAL

SELECTION

PROCEDURE

cont.

Bottom

Drive

Conveyor

Sprocket

Requirements

and Location

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MT-15 Rex® Engineering Manual

SPROCKET SPROCKET WIDTH

I

I I 3 '

I

I I I

12' WIDTH

and Sprockets

I

Sprocket Locations

4700 Chains and 5700 Assembled to Width Chains

820 and NS820 Sprockets

820 and N820 Double Groove Sprockets

N4700 and N5700 Sprockets

Figure 32

Figure 33

Figure 31

For molded-to-width sizes or chains not shown, contact Rexnord.

2-1/22-1/2

C/L 820

SPROCKETC/L 820

SPROCKET12" WIDTH

3 3

12" WIDTH

C/L 820 DOUBLE

SPROCKETC/L 820 DOUBLE

SPROCKET

12" WIDTH

C/L SPROCKET

4700C/L SPROCKET

4700

3 3

SELECTION

PROCEDURE

cont.

Sprocket

Requirements

and Location

cont.

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Rex® Engineering Manual MT-16

I SPROCKET POCKET SPROCKET

3-112 1-114

I ! ! ! ! I

SPROCKET POCKET I

5900 Chains

Figure 34

Figure 35

Figure 36

5935 and 5936 Chains

5966 and 5995 Chains

5996 and 5997 Chains

3/4 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 3/4

C/L SPROCKET

POCKET

12" WIDTH

12" WIDTH

1-1/2 3 3 3 1-1/2

C/L SPROCKET

POCKETC/L SPROCKET

POCKET

1-1/4 3-1/2 2-1/2 3-1/2 1-1/4

C/L SPROCKET

POCKET

12" WIDTH

SELECTION

PROCEDURE

cont.

Sprocket

Requirements

and Location

cont.

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MT-17 Rex® Engineering Manual

ROUND BORE SPROCKETS

Figure 37

Figure 38

SQUARE AND HEX BORE SPROCKETS

Use round bore sprockets on conveyors

operating at room temperature. When

installing the sprockets, make sure that all

sprocket faces are positioned the same way

on the shaft, with identification marks all

facing the same direction, as shown above.

After positioning all sprockets in line with

sprocket tooth pockets in the chain, secure

the sprockets with set screws. (Also see

general note below).

Use square or hex bore sprockets on

conveyors intended for use at elevated or

lower temperatures (warmers, pasteurizers,

coolers, etc.). When installing the sprockets

make sure that all sprocket faces are

positioned the same way on the shaft, with

identification marks all facing the same

direction , as shown. Also, be sure to align

the notched teeth for proper timing.

GENERAL NOTE: It is generally recommended to lock center sprocket(s) to shaft

using set screws or set collars. The other sprockets should be allowed to "float" axially.

SELECTION

PROCEDURE

cont.

Sprocket

Installation

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Rex® Engineering Manual MT-18

MATTOP® NOMINAL AND ACTUAL WIDTHS

NOMINAL WIDTH NOMINAL WIDTH

12" 24" 36" 48" 60" 12" 24" 36" 48" 60"

4705 4705ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LT

LF

HT

LT

11 15/16

11 31/32

11 15/16

23 29/32

23 29/32

23 29/32

35 27/32

35 7/8

35 27/32

47 13/16

47 13/16

47 13/16

59 3/4

59 25/32

59 3/4

303.2

303.9

303.2

607.2

607.2

607.2

910.4

911.2

910.4

1214.4

1214.4

1214.4

1517.7

1518.4

1517.7

4706 4706ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LT

LF

HT

LT

11 15/16

11 31/32

11 15/16

23 29/32

23 15/16

23 29/32

35 27/32

35 15/16

35 27/32

47 25/32

47 29/32

47 25/32

59 23/32

59 27/32

59 23/32

303.2

303.9

303.2

607.2

607.9

607.2

910.4

912.8

910.4

1213.6

1216.8

1213.6

1516.8

1520.0

1516.8

5935 5935ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LF

HT

11 15/16

11 15/16

23 27/32

23 7/8

35 25/32

35 13/16

47 23/32

47 3/4

59 21/32

59 11/16

303.2

303.2

605.6

606.4

908.8

909.6

1212.0

1212.8

1515.3

1516.0

5936 5936ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LF

HT

11 31/32

11 15/16

23 15/16

23 7/8

35 29/32

35 13/16

47 7/8

47 3/4

59 27/32

59 11/16

303.9

303.2

607.9

606.4

912.0

909.6

1216.0

1212.8

1520.0

1516.0

5966 5966ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LT

LF

HT

LT

11 31/32

11 31/32

11 31/32

23 31/32

23 15/16

23 29/32

35 15/16

35 27/32

35 7/8

47 29/32

47 27/32

47 13/16

59 27/32

59 27/32

59 25/32

303.9

303.9

303.9

608.8

607.9

607.2

912.8

910.4

911.2

1216.8

1215.2

1214.4

1520.0

1520.0

1518.4

5995 5995ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

WSM

LT

WSM

LT

12 1/32

12 1/32

24 1/16

24 1/16

36 3/32

36 3/32

47 1/8

47 1/8

60 5/32

60 5/32

305.6

305.6

611.2

611.2

916.8

916.8

1222.4

1222.4

1527.9

1527.9

5996 5996ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LT

LF

HT

LT

11 31/32

11 15/16

11 15/16

23 29/32

23 29/32

23 29/32

35 7/8

35 27/32

35 27/32

47 13/16

47 13/16

47 13/16

59 25/32

59 3/4

59 3/4

303.9

303.2

303.2

607.2

607.2

607.2

911.2

910.4

910.4

1214.4

1214.4

1214.4

1518.4

1517.7

1517.7

NOMINAL WIDTH NOMINAL WIDTH

48" 60" 72" 84" 96"

5997 5997ACTUAL WIDTH INCHES ACTUAL WIDTH MILLIMETERS

LF

HT

LT

LF

HT

LT

47 3/4

47 7/8

47 29/32

59 11/16

59 27/32

59 7/8

71 5/8

71 13/16

71 27/32

83 9/16

83 25/32

83 13/16

95 1/2

95 3/4

95 13/16

1212.9

1216.0

1216.8

1516.0

1520.0

1520.8

1819.3

1824.0

1824.8

2122.5

2128.0

2128.8

2425.7

2432.0

2433.6

48" 60" 72" 84" 96"

TOLERANCES on all above actual widths +/-1/32" (0.8 mm).

For chain widths less thank 12", use nominal width +/-1/32" (0.8 mm).

5705 and 5706 chains are the same as 4705 and 4706 respectively.

For molded-to-width sizes or chains not shown, contact Rexnord.

WIDTHS

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MT-19 Rex® Engineering Manual

CHAIN INSTALLATION AND REPLACEMENT

MatTop® chains are typically supplied in

10 foot lengths with connecting pins for

each strand. Before connecting strands,

use one strand to check for proper guide

clearance and sprocket alignment.

Lay each section in the conveyor track and

couple.

1. Push the pin through the link using a

3/16" or 1/4" diameter drift until the

opposite end can be gripped and pulled

through the remaining links.

2. Replace links as required and replace all

pins that were removed with new pins.

3. Using a soldering iron to form a pin head

so that the head is recessed in the end of

the link. (A special "tip" for standard

soldering irons is available from Rexnord.

Contact your sales representative or

distributor for details.

Rexnord provides the soldering iron tips at

a nominal cost. A 40 watt to 80 watt

soldering iron is recommended.

Contact MatTop® Customer Service for

pricing and delivery.

Installation

and

Replacement

Installation

4700 and 5900

Series

Replacement

4700 Series

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Rex® Engineering Manual MT-20

Rexnord has pin extracting tools available

for disassembling 5900 series chains. Also,

standard sheet metal or wood screws may

be used.

Contact MatTop® Customer Service for

pricing and delivery.

A chain assembly tool is also available

from Rexnord. This device will help pull

chain together during final assembly when

the last pin in inserted. The assembly tool

works with 4706, 5996, and 5997 chains.

Contact MatTop® Customer Service for

pricing and delivery.

1. Pry pin lock insert out

with screwdriver.

2. Turn the screw starter

(sheet metal screw, etc.)

into plastic pin.

3. Pull out plastic pin.

Remove or add links as

needed. Reinstall pin and

pin lock insert.

Replacement

5900 Series

Tools

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MT-21 Rex® Engineering Manual

Rex® Multiflex Engineering

Manual

RUN STRAIGHT RUN

The figure at right shows a typical straight section of conveyor.

Note that the conveyor frame is designed to support the chain on

the bottom of the link. The wear strip spacing is varied to

distribute the wear evenly across the bottom of the link. This

open design is preferred over full width support since it prevents

the build-up of debris in the track. For dry abrasive conditions

use steel wear strips. For wet abrasive conditions use stainless

steel wear strips. For non-abrasive conditions use UHMWPE or

Nylatron®.

The chain is fully supported at all points in the conveyor. The

chain is guided by two side members as shown in Section A-A.

Chain guides are of such a height that they would not interfere

with a product that may overhang the sides of the chain.

Very wide products can be handled on this chain through proper

product guide rail spacing and design (guide rails not shown in

Section A-A).

CORNER SECTIONS

The corner discs guide the chain around the corner. Corner turn

discs are used to guide the chain without significant increase in

chain tension. For curves of 15° or less, it is possible to use a

conventional stationary curve (wear strip). (For 1701, 1702, 1701

TAB, and 2500 chains stationary (sliding) curves can be used for

any corner turn.)

The chain supporting members, chain guides, and product guide

rails for corners are similar to those used in the straight sections.

The corner sections of the conveyor provide full chain support.

The corner discs are positioned in such a manner that the chain,

while being engaged with the disc, is also being supported by the

wear strips.

The chain guides are provided on the outside of the curve while

the corner turn disc provides guidance on the inside of the curve.

It is very important to have the chain enter and leave the

disc in the same plane as the disc. This is necessary to

maintain the chain on the disc.

29/32" MIN.

(58 mm)

25/ 3

2"

(20 m

m)

CHAIN

GUIDE

MA

X.

CHAIN WEAR STRIP

SECTION A - A (WITH CHAIN IN POSITION)

Note-1700 chain is shown in the illustrations in this section (Multi-flex section-Pages 1-8).

Most of the information can also ve used for 1755, 1701, 1702, 1701 TAB and 2500.

CHAIN GUIDES 1/2" (12.7mm)

Recommended minimum spacing to preventwear on pivot which mighteffect sprocket action.

CHAIN WEAR STRIPS

A

A Typical Straight Run Conveyor - Top View

*7116" (179.5mm) radius to

inside of chain guide (1700 chain only)

CHAIN WEAR STRIP

CORNER DISC

CHAIN

GUIDE

*For Large Turn Disc "L" Dimensions = 10",

radius will be 11.16" (283.5mm).

Typical Corner Section

with Chain in Position

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

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MF-1 Rex® Engineering Manual

This

As illustrated earlier, the Rex® Multiflex chains are ideally suited

for use on multi-incline conveyors. To assure proper functioning

of these conveyors it is important:

1. That the chain enters and leaves the disc in the same plane as

the disc.

2. That any change in the angle of chain travel should occur

through downflexing of the chain - not backflexing.

Maximum incline angle for Multiflex chains should not exceed 1

1/4 inches per foot (104.2 millimeters per meter). The actual

angle of incline for an application depends on product stability

and product - chain coefficient of friction.

MULTI-INCLINE CONVEYORS

WHEN INCLINING, the chain must pass through a

transition zone prior to entering the disc. The disc

should be tipped so that it lies in the same plane as the

leaving chain. Also, provide for minimum spacing, D, for

the entering chain.

WHEN DECLINING, the chain must pass through a

transition zone only after it has left the disc. The disc

should be tipped to lie in the same plane as the entering

chain. Also, provide for minimum spacing, D, for the

leaving chain.

Note: In the transition zone, the wear strips should be

curved to accomplish smooth transition from one plane

of conveying to the next.

CORNER

DISC

CL

D

Not ThisAny change in angle of chain travel should

be made by downflexing the chain as

shown. Backflexing through a change in

angle will cause the chain to rise out of the

conveyor frame.

Chain BackflexingChain Downflexing

TRAVEL ENTERING

TRAVEL

LEAVING

CLCORNER

DISC

MIN. = 0.3 OF DISC DIAMETER

(0.5 FOR WIDE PRODUCTS)

D

TRANSITION

ZONE

(See Note)

Side View of Incline Conveyor at Corner Disc

Side View of Decline Conveyor at Corner Disc

TRAVEL ENTERING

TRANSITION

ZONE

(See Note)

MIN. = 0.3 OF DISC DIAMETER

(0.5 FOR WIDE PRODUCTS)

TRAVEL

LEAVING

CORNER

DISC

D

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

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Rex® Engineering Manual MF-2

* This arrangement can be part of an intermediate drive, which allows a single strand of chain to be used. See Page (TableTop®, 10).

PRODUCT TRANSFERS

Chain downstream should be at the same height of slightly lower

(1/32") than chain upstream to prevent product tippage.

By using simple switching devices at different transfers, Multiflex

Chain can be further utilized to continuously distribute products

to different points in the plant.

The flexibility of Multiflex chains permits the use of several types

of transfer.

1 FT.

Recommended

Minimum

1 FT.

Recommended

Minimum

Side Transfer Where Product*

Moves in Straight LineSide Transfer Where Product*

Moves Laterally from Chain to Chain

1 FT.

Recommended

Minimum

Cross Transfer Where Product

Can Flow Straight fro Chain to Chain

or Remain on Same Chain

Using Switches

Corner Transfer Where Product

Can be Transferred from

Corner to Conveyor

or Remain on Same Chain

Using Switches

SWITCHING

DEVICE

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

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MF-3 Rex® Engineering Manual

CHAIN RETURNS

A great variety of chain returns are possible with Rex® Multiflex

chains. This variety of returns offers considerable conveyor

design freedom.

The best type of return for a specific case depends on the

conveyor configuration and other application considerations

(product flow, available space, etc.).

Note 1: The CORNER TURN DISC in the return section is

mounted in the same manner as in the carry section: the return

disc is not* mounted upside-down. The top of the disc should be

even with the bottom of the upside-down chain.

Note 2: IDLER WHEELS are recommended for tail wheels, not

sprockets. If the idler wheel does not have a flange to contain the

chain, then the conveyor frame must have a "skirt" to track the

chain on the wheel.

CONVENTIONAL CONVEYORS

If the Multiflex chain is used to convey in one plane, a

conventional return might be used as shown.

IDLER

WHEEL

FOR TAIL

WHEEL

(See Note 2)

For Mounting

details, see Page 8

Multiflex.

NOTE: RETURN CHAIN FOLLOWS

SAME PATH AS CARRYING

CHAIN ON CONVEYOR.

Page 6, Multiflex.

CORNER DISCS

(See Note 1)

IDLER

WHEEL

FOR LEAD-IN

TO RETURN

SUPPORT

DRIVE SPROCKET**

For mounting

details, see Page 8

Multiflex.

CONVENTIONAL

CATENARY,

See Page 7 TableTop®

*1701 is an exception. Return disc is mounted upside down. (Applies to bevel style chain only).

**For intermediate drive arrangement see Page 10, TableTop®.

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

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Rex® Engineering Manual MF-4

CHAIN RETURNS (Continued)

ELEVATING CONVEYORS

DRIVE SPROCKET*

CORNER DISCS

Sideflexing Return on Typical Elevator

'For Intermediate arrangement see Page 10, TableTop®.

NOTE:

CHAIN IS IN

CARRYING

POSITION

DRIVE

SPROCKET*

For mounting

details, See

Page 8,

Multiflex.

FREE-

HANGING

RETURN

TRAVEL IDLER

WHEEL

(TAIL WHEEL)

For mounting

details, See

Page 8,

Multiflex.

FOR

PROPER

CATENARY

See Page 7,

Multiflex.

drive

Rex® Multiflex chains have the ability to elevate or

lower products in a very compact area. This figure

shows a typical elevating system and how the chain is

being returned on such a unit. Note that the chain

hangs straight down from the drive sprocket and side

flexes back up into the tail section (there is no sliding

return). Elevators can also be designed with combined

free-hanging (catenary sag) returns and sliding returns.

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

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MF-5 Rex® Engineering Manual

CHAIN RETURNS

(Continued)

CARRY CARRY

Straight Run Corner Section

RETURN RETURN (See Page Note 1)

For supported returns on conventional or elevating conveyors,

sliding returns are recommended, not roller returns.

The straight corner section design for the sliding return can be

the same as for the carry section. The chain is simply run in the

conveyor upside down through the return section.

4, Multiflex

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

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Rex® Engineering Manual MF-6

CHAIN RETURNS (Continued)

CATENARY SAG

(For elevating and lowering only. For conventional

conveyors see Page 7, TableTop®).

Two considerations in return design are:

Elevating System

HEAD

1. Provide a minimum of 90° wrap on the head sprocket.

2. Provide required chain tension through controlled catenary

sag in the return strand to balance unabsorbed chain tension.

SHAFT

TAIL SHAFT-

Recommended Chain Length in Catenary for 90 Wrap on Sprockets

Catenary Length

(Feet)

Metric

Catenary Length (Meters) Headshaft Headshaft

Chain Chain

Tension (LBS)

Tension 1700

1701

1702 (Newtons)

DEFINITION OF CATENARY LENGTH

Lowering System

.TAIL SHAFT

HEAD

CATENARY

LENGTH

ALTERNATE CATENARY ARRANGEMENTS

If the recommended length of chain in the catenary cannot

be maintained (because of space limitations, etc.) increase

the chain wrap to by use of an idler wheel as shown.

With an idler wheel arrangement, the catenary chain length

only needs to be of that listed in the above table.

Head Sprocket With an Wheel

multiflex

important

SHAFT

CA

TE

NA

RY

LE

NG

TH

17551700

1701

1702

1755

1

1.5

2.5

3.0

4.5

6.0

7.0

2

4

6

-

-

-

-

50

100

150

200

300

400

500

0.4

0.6

0.7

1.0

1.5

2.0

2.3

0.8

1.6

2.0

-

-

-

-

250

450

650

900

1500

1800

2200

120°

1/4

TRAVEL

HEAD

SPROCKET

120°WRAP

IDLERWHEEL

Idler

MULTIFLEX

CHAIN

ENGINEERING

TYPICAL

CONVEYOR

CONSTRUCTION

Rex

®M

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x C

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ns

MF-7 Rex® Engineering Manual

SPROCKET AND WEAR STRIP POSITIONING

For Multiflex Chains Only

Chain

Multiflex

Wheel Diameter

B C

Chains

1701, 1702

1755

2500

A=

1.968"

1.575"

3.0"

Only:

B values same as above

LOCATION AND POSITIONING

STRIP

TOP OF AR STRIP

\

TOP OF WEAR STRIP

IDLER WHEEL

A = (Pitch Diameter) - C

2

WEAR STRIP

B

A +1/32 -0

(50mm)

(40mm)

(76mm)

15/32"

1/4"

45/64"

2TOP OF WEAR STRIP

WEAR STRIP

B

A +1/32 -0

MULTIFLEX

CHAIN

ENGINEERING

SPROCKET &

IDLER

POSITIONING

Rex

®M

ultiflex C

hain

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Rex® Engineering Manual MF-8

Lubrication Chain Material Condition

Acetal

Wear strip Material

Carbon and UHMWP and

Stainless Steel Nylatron

Dry

Water

Soap & Water

Oil

LF Acetal

Product Material

Carbon Steel and S tainless

Steel

Plastic

[Including PET)

Paper

Lubrication

Condition

Steel

LF Acetal HP Acetal Carbon Steel

Aluminum

Glass

Returnable

Glass Bottles

Non-Returnable

Glass B ottles

Chain Type And Material

Note: for LBP chains (typically) = 0.07

HP Acetal

Dry

Water

Soap & Water

Oil

Dry

Water

Soap & Water

Oil

Water

Soap & Water

Oil

0.30

0.23

0.15

0.10

0.25

0.21

0.15

0.10

0.25

0.20

0.15

0.10

0.20

0.18

0.15

0.10

0.22

0.20

0.15

0.10

0.18

0.16

0.14

0.10

0.50

0.40

0.20

0.20

0.40

0.30

0.20

0.20

Friction Factors Between Chain and Wearstrips (Fw)

Friction Factors Between Product and Wearstrips (Fm)

D AcetalStainless

Steel

Dry

Water

Soap & Water

Dry

Dry

Water

Soap & Water

Oil

Dry

Water

Soap & Water

Dry

Water

Soap & Water

Dry

Water

Soap & Water

Dry

Water

Soap & Water

0.25

0.20

0.15

0.33

0.30

0.22

0.15

0.10

0.25

0.17

0.12

0.20

0.15

0.10

0.27

0.18

0.14

0.20

0.15

0.10

0.20

0.18

0.15

0.30

0.25

0.20

0.15

0.10

0.20

0.15

0.12

0.15

0.13

0.10

0.20

0.16

0.14

0.15

0.13

0.10

0.18

0.16

0.14

0.25

0.18

0.16

0.13

0.10

0.18

0.14

0.12

0.14

0.12

0.10

0.18

0.16

0.14

0.13

0.11

0.10

0.30

0.20

0.10

0.40

0.35

0.25

0.15

0.15

0.28

0.19

0.12

0.35

0.25

0.15

0.47

0.31

0.21

0.35

0.25

0.15

0.30

0.20

0.10

0.40

0.35

0.25

0.15

0.15

0.28

0.19

0.12

0.35

0.25

0.15

0.47

0.31

0.21

0.35

0.25

0.15

FM

MULTIFLEX

CHAIN

ENGINEERING

STRAIGHT

RUNNING

CHAINS

Rex

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MF-9 Rex® Engineering Manual

Conveyor

Section

1

2

(CASE B)

EXAMPLE 1 :

CONVENTIONAL CONVEYOR

PARAMETERS:

Chain Weight = 1 0 Lb /Ft. (1701 TAB)

Product Weight = 5

= 0.25

fm =

25 Ft. Slippage from Head Sprocket

20 1.0 0.25 5.0 5.8

30 1.0 0.25 7.5

Speed = 120 FPM

= 5 Per Hour

PLF = 1.5

SECTION #4

3

4

30 6.0 0.25 45 .0 5 5.0 0.18 4.5 62 .8 1.15 72 .2

20 6.0 0.25 30 .0 102 .2 20 5.0 0.18 18.0

6

TA = CT x PLF

= 180.3 Lbs.

Where

TA = Tension. Adjusted

CT = Chain Tension

RETURNSUPPORTIDLER

SECTION #2

SECTION #1

20"

SECTION #3

30"

IDLERWHEEL

DRIVESPROCKET

CORNERDISCS

Lb /Ft.

fw

0.18

Stop-Start

5.0 + 0 1.15

13.3

"L"

Section

Length

(Ft.)

"W"

Chain

Weight

(Lbs./Ft.)

"fw"

Coefficient

of Friction

Chain

Tension

(Lbs.)

1 x 2 x 3

Chain

Tension

into The

Turn

(Lbs.)

4 + Prev 7

Turn Factor

(TF) 1.15

TF Used

For The Section

(Lbs.)

5 x 6

No TF Used

For The Section

(Lbs.)

4 + Prev 7

Chain Tension

Slip-4

Slip-3

1 2 3 4 5 6 7

Tr = Tension in Return Section

Tc + Ts = Tension in Carry Section + Slippage

120.2 (CT)

58.3

1 2 3 4 5 6 7

Conveyor

Section

"L"

Section

Length

(Ft.)

"W + M"

Chain +

Product

Weight

(Lbs./Ft.)*

"fw"

Coefficient

of Friction**

Chain

Tension

(Lbs.)

1 x 2 x 3

Chain

Tension

into The

Turn

(Lbs.)

4 + Prev 7

Turn Factor

(TF) 1.15

TF Used

For The Section

(Lbs.)

5 x 6

No TF Used

For The Section

(Lbs.)

4 + Prev 7

Chain Tension

* For "Slip", only use "M"

** For "Slip" use "fm"

120.5 x 1.5

CALCULATION

OF CHAIN

TENSION FOR

MULTIFLEX

CHAINS

Rex

®M

ultiflex C

hain

s

Rex® Engineering Manual MF-10

DRIVE SPROCKET

SECTION #8

(CASE C)

EXAMPLE 2:

ELEVATOR

PARAMETERS:

Chain Weight W = 0.85 Lb./Ft/ (1700)

Product Weight M = 7 Lb./Ft.

fw = 0.25, fm - 0.18

Sections 3 through 8

are inclined at 3/4 "/Ft.

fw (incline) = 0.25 x Ks

= 0.25 x 1.25 = 0.31

25 Feet of Slippage from

Headshaft

Speed = 80 FPM

Stop-Start = Continuous Run

PLF = 1.0

DRIVE SPROCKET

TR

AV

EL

SECTION #4

SECTION #1

RETURNSUPPORT IDLER

SECTION #5

SECTION #6

SECTION #2

SECTION #9

SECTI

ON #

3

SECTION #

7

10'

13'

13'

3'

Conveyor

Section

1

2

3

4

5

6

7

Slip-7

8

Slip-8

9

Slip-9

TA = CT x PLF

= 404.0 Lbs.

Where

TA = Tension. Adjusted

CT = Chain Tension

"L"

Section

Length

(Ft.)

"W + M"

Chain +

Product

Weight

(Lbs./Ft.)

"fw"

Coefficient

of Friction

Chain

Tension

(Lbs.)

1 x 2 x 3

Chain

Tension

into The

Turn

(Lbs.)

4 + Prev 7

Turn Factor

(TF) 1.15

TF Used

For The Section

(Lbs.)

5 x 6

No TF Used

For The Section

(Lbs.)

4 + Prev 7

Chain Tension

1 2 3 4 5 6 7

* For "Slip", only use "M"

** For "Slip" use "fm"

404.0 x 1.0

13

3

10

10

10

10

10

2

10

10

13

13

7.85

7.85

7.85

7.85

7.85

7.85

7.85

7.0

7.85

7.0

7.85

7.0

0.25

0.25

0.31

0.31

0.31

0.31

0.31

0.18

0.31

0.18

0.31

0.18

25.5

5.9

24.3

24.3

24.3

24.3

24.3

2.5

24.3

12.6

31.6

16.4

-

35.2

64.8

98.8

137.9

182.9

234.6

237.1

297.0

309.6

-

404.0

1.15

1.15

1.15

1.15

1.15

1.15

-

1.15

-

1.15

-

-

29.3

40.5

74.5

113.6

158.6

210.3

-

272.7

-

356.0

-

-

-

-

-

-

-

-

234.6

-

297.0

-

387.6

404.0 (CT)

MULTIFLEX

CHAIN

ENGINEERING

Rex

®M

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x C

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MF-11 Rex® Engineering Manual

Minimum Chain and Wear Strip

Acetal and LF Acetal - 40

Nylon - 40

- 100

Steel - 40

Lubricant impregnated wood - 50

UHMWPE

ABRASION Presence of broken glass metal fines paint

chips. etc

Maximum Temperature

170 150

800 250*

350 250*

160 160

(250) 180 (250) 160

If such abrasives are present chain-wear strip combinations

should be selected to provide maximum resistance to abrasive

wear. In general, thermoplastic materials are not recom-

mended because abrasive particles may imbed in the materials and result in rapid wear of chain

wear strips. Metal chains and wear strips are recommended

unless previous application experience shows that the ther-

moplastic materials give adequate service.

TEMPE RATU RE

The maximum and minimum recommended operating temper-

ature for chain and wear strips can vary due to the

presence of moisture. When two different materials are pres- ent in the construction of a chain, the more critical

material temperature rating will apply. If temperature exceeds

the maximum or minimum shown, contact Rexnord.

LUBRICATION

conveyors should always be lubricated.

CAUTION

and/or softer

TableTop®

TableTop®

Enlarged view of plastic wear strip

embedded with glass particles.

Abrasive wear of thermoplastic

chain.

Stainless Steel

Materials

- 100

Temperature

Dry WetDry

(250)

(250)

(250)

(250)

150 180

TEMPERATURE GUIDE, DEGREES F.

For continuous operation on 150° F, water, allowable load on one-piece link Acetal

and LF Acetal chains should be reduced. Consult Rexnord, Inc.

*Properties other than ability to resist temperature should be considered. i.e. stress

corrosion cracking, corrosion, etc.

Temperature shown in ( ) indicate temperature to which material may be subjected

for brief intermittent periods. For example, chains can be steam cleaned, but

caution should be used to avoid continuous exposure.

S881, SS881, 1874 and 1874SS

Whenever possible, lubrication should be used to assure

maximum chain life and optimum conveyor operation.

Types of lubrication normally used are: oils, water soluble

lubricants, soaps and plain water. See pages 15 and 16 for

detailed lubrication recommendations and methods.

In most conveyors including those using both metal and

thermoplastics chains, it is advisable to prelubricate both

the conveyor (carrying and return wear strips and curves)

and the chain prior to running. This will achieve best

"break-in" of chain and wear strips during the initial run-in.

In some applications the presence of a lubricant cannot be

tolerated. If the conveyed product or operation cannot

tolerate lubrication it is recommended that chains made of

LF Acetal material be considered.

STATIC ELECTRICITY

Under certain conditions, thermoplastics can acquire a

static charge. In theory, at least, it is possible that this

condition can cause a spark. Therefore, it is advisable to

use extreme caution when applying thermoplastic chains,

sprockets or wear strips in a combustible environment.

Consider "AS" material or metal chains.

If thermoplastics are used in a combustible environment, takethe necessary precautions. These include:

1. Avoid dry and/or cold environment.2. Ground entire conveyors using metal components.3. Lubricate if possible.4. Use static spark suppressors.

ENVIRONMENTAL

CONDITIONS

Rex

®M

ultiflex C

hain

s

Rex® Engineering Manual MF-12

CORROSION RESISTANCE GUIDE- CHAIN AND WEAR STRIP MATERIALS

Common or Chemical Name

Solutions contained in the product conveyed as well

as solutions used to clean or lubricate the chain and

equipment may result in corrosive attack of chain

and tracks. Chain and track material have varying

degrees of resistance to corrosion. Use this guide to

help you select chain materials for various corrosive

environments.

With thermoplastics, do not use cleaning or

lubricating agents with a pH below 4 or above 10.

Or chemicals containing chlorine or free ammonia.

These agents may cause immediate attack or

"crazing" after several applications due to

concentration by evaporation.

This table is based on data available by suppliers of

the various materials. For those chemicals with a

marginal or unsatisfactory rating - or for chemicals

not included - contact Rexnord for

recommendations.

Steel

Nylon

and

Nylatron®Austenitic

Series

Ferritic*

and

Martensitic

Series

LF

Acetal

and

Acetal

Chemically

Resistant

Plastic

(P)

Ultra High

Molecular

Weight

Polyethylene

(UHMWPE)

Poly-

propylene

(HT)

Poly-

ethylene

(LT)

(DATA BASED UPON 68°f)

Acetic Acid (over 5%-up to 50%

Acetone

Alcohol

Ammonia

Beer

Beverages-Soft Drinks

Benzene

Brine (pickle)

Carbon Tetrachloride

Chlorine

Citric Acid

Cyclohexane

Ethyl Chloride

Formaldehyde

Formic Acid

Fruit Juices

Gasoline

Hexane

Hydrochloric Acid (up to 2%)

Hydrochloric Acid (up to 37%)

Hydrogen Peroxide

Iodine

Isopropanol (isopropyl alcohol)

Kepodene

Lactic Acid

Methylene Chloride

Milk

Muriatic Acid

Nitric Acid (low concentrations)

Oil (vegetable or mineral)

Paraffin

Phosphoric Acid (up to 10%)

Soap and Water

Sodium Chloride

Sodium Hydroxide (up to 25%)

Sodium Hypochlorite (Bleach)

Stearic Acid

Sulphuric Acid (up to 40%)

Toluene (Toluol)

Turpentine

Vegetable Juices

Vinegar

Water (fresh)

Whiskey

Wine

Xylene

U

U

S

M

S

S

S

U

M

U

U

S

U

U

S

U

U

U

U

S

S

U

S

U

U

S

S

U

M

U

U

U

U

U

S

M

U

U

S

S

S

M

S

S

S

S

S

S

M

S

U

M

S

S

U

S

S

U

U

U

U

S

S

M

S

U

U

S

S

U

S

S

U

U

S

U

S

S

S

S

S

S

S

S

M

S

S

S

S

S

S

M

M

U

S

S

S

U

S

S

S

U

U

S

U

S

S

S

S

S

U

S

S

S

S

S

M

S

U

S

U

S

S

S

S

S

S

S

S

U

S

S

S

S

S

S

U

M

U

M

S

U

M

S

S

U

U

M

U

S

S

U

S

U

M

S

S

U

S

U

S

U

S

U

S

S

U

S

S

S

S

U

S

S

U

S

S

S

M

S

U

M

S

S

S

U

S

S

S

U

U

U

U

S

S

S

S

S

U

U

S

S

U

S

S

S

U

M

U

M

S

S

S

S

S

S

S

S

S

S

S

S

S

M

S

M

S

S

U

M

S

S

S

M

U

S

S

S

M

S

M

S

U

S

S

S

S

S

S

S

S

S

S

S

S

U

U

S

S

S

S

S

M

S

S

S

S

S

S

M

S

M

S

S

U

M

S

S

S

M

S

S

M

S

M

S

S

S

S

S

M

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

U

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

U

S

S

S

U

S

S

S

S

S

S

S

S

U

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

M

S

M

S

S

U

M

S

S

S

M

U

S

S

S

M

S

M

S

U

S

S

S

S

S

S

S

S

S

S

S

S

U

U

S

S

S

S

S

M

ENVIRONMENTAL

CONDITIONS

CORROSION

Rex

®M

ult

ifle

x C

hai

ns

MF-13 Rex® Engineering Manual

BASED ON PRODUCT SIZE AND SPACING

PRODUCTS PER FOOT OF CONVEYOR FOR VARIOUS CONVEYOR WIDTHS

Conveyor Flow Width = 3 Inches Conveyor Width = One Strand x 3% Inch Flight Width

Products Per Foot Conveyor Flow Width = 12 Inches Conveyor Width = Two Strands x 6 Inch Flight Width

FORMULA FOR FINDING NUMBER OF ROUND CONTAINERS PER SQUARE FOOT OF AREA FOR FULLY PACKED CONDITIONS (ROUND CONTAINERS)

Containers Per Square Foot = Where:

D = Container Diameter - Inches

Where:

Diameter - Containers Per Square Meter =

PRODUCT CONVEYED - MATERIAL, SIZE, WEIGHT

The size of the product conveyed, and the

production output determine the conveyor width

required (conveyor width = number of strands x

chain flight width). For example, as shown in the

sketches below, it is possible to obtain a production

output of 1600 products per minute (3" diameter

cans) by conveying in single file at 400 feet per

minute. Same output could be accomplished by

using a wider chain, at a slower speed of 100 feet

per minute.

PRODUCTS PER FOOT OF CONVEYOR

CONVEYOR FLOW WIDTH

(SPCING BETWEEN

GUIDE RAILS)

PR

OD

UC

T S

IZE

- in

ch

es

4 PRODUCTS PER FOOT

16 PRODUCTS PER FOOT

D = Container Millimeters

166.277

1.5 x 106

D2

D2

Product

Contact Surface

Dairy Products

Cafeteria Products

Food

Household Items

Rated Size Contents Size - Inches

Total Full

WeightEach, Lbs.Material

1/2 PintOintQuart1/2 GallonGallon

1/2 lb.1 lb.2 lb.

Milk

CottageCheese

Paper

Paper

3 x 33 x 3

3 1/8 x 3 1/84 1/8 x 4 1/8

6 x 6

0.6 1.1 2.3 4.5 8.8

0.6 1.1 2.3

4 Dia.4 3/4 Dia.

5 Dia.

(Weights and sizes will vary; consult Rexnord Inc.for assistance in selection.)

12 oz.

RegularJunior

10 1/2 oz.

Meat

BabyFood

Soup

Metal

Glass

Metal

3 7/8 x 2 1/8 Rect.

2 3/8 Dia.2 3/8 Dia.

0.94

0.56

0.8

0.8

12 oz.22 oz.32 oz.

Quart1/2 GallonGallon

SoapLiquidDetergent

Bleach

Plastic

Plastic

3 3/8 x 2 Oval3 3/4 x 2 5/8 Oval4 1/2 x 2 5/8 Oval

3 1/4 Dia.4 3/4 Dia.6 1/4 Dia.

0.9 1.6 2.3

2.4 4.8 9.5

* Non Returnable

Product

Contact Surface

Beverages, Juices

Rated Size Contents Size - Inches

Total Full

WeightEach, Lbs.Material

29 oz.46 oz.

6 oz.12 oz.

7 oz.8 oz.12 oz.16 oz. 24 oz. 28 oz. 32 oz.

12 oz.

16 oz.32 oz.

1 Liter2 Liter

12 oz.12 oz.16 oz.32 oz.

12 oz.

8 oz.12 oz.16 oz.

1/2 lb.1 lb.2 lb.3 lb.

6 oz.10 oz.

Citrus

CitrusConc.

SoftDrink

SoftDrink

SoftDrink

SoftDrink

Beer

Beer

Beer

Coffee

CoffeeInstant

Metal

Paper

Glass

Metal

Plasti-shield

PET

Glass

Metal

Metal (Alum.)

Metal

Glass

3 3/8 Dia. 4 1/4 Dia.

2 1/2 Dia. 2 5/8 Dia.

2 1/8 Dia. 2 3/8 Dia. 2 5/8 Dia. 2 5/8 Dia. 3 1/8 Dia. 3 3/8 Dia. 3 5/8 Dia.

2 5/8 Dia.

2 3/16 Dia. 3 3/8 Dia.

3 3/16 Dia. 4 3/16 Dia.

2 1/2 Dia. 2 3/4 Dia. 2 3/4 Dia. 3 3/4 Dia.

2 5/8 Dia. 2 5/8 Dia. 2 5/8 Dia.

2 11/16 Dia.

4 1/8 Dia. 4 1/8 Dia. 5 1/4 Dia. 6 1/4 Dia.

3 1/2 Dia. 3 7/8 Dia.

2.3 3.6

0.54 1.0

1.1 1.4 1.9 2.1 3.1 3.6 3.9

1.0

1.6 3.1

2.4 4.7

1.5 1.2 1.6 3.4

0.63 0.94 1.2

0.8

0.8 1.3 2.5 3.8

1.1 1.6

CHAIN FLIGHT

WIDTH

Rex

®M

ultiflex C

hain

s

Rex® Engineering Manual MF-14

GENERAL INFORMATION

Chain in service will generally wear out before it breaks in

fatigue, if it has been selected properly for the application. For

straight running chains, the normal wear areas are the top

flights and pin joints. Sideflexing chains also wear in this

manner. But sideflexing chain wear life is usually limited by

wear of the reach bar surfaces which contact the corner wear

strips.

Proper chain and wear strip selection will provide optimum

chain and wear strip life. Friction and wear resistance are two

factors which should be considered when selecting a wear strip

material:

1. The lower the coefficient of friction between the chain

and wear strip, the longer the chain life.

2. The greater the wear resistance of the chain and wear strip

materials, the longer the chain life and wear strip life.

Of course, the combination of chain tension, top load, type of

lubrication, abrasion and speed of a given conveyor will govern

the final wear rate of a particular chain-wear strip combination.

The worst condition is high speed, dry operation.

Rexnord has accumulated many years of application

experience as well as laboratory test data on chain-wear strip

compatibility. The following general guide lines will help in the

application of wear strip materials.

See Page 17, Multiflex for specific recommendations.

METAL WEAR STRIPS

Metal wear strips are harder than non-metallics, and in addition

can be heat treated or work hardened to increase hardness.

They are, therefore, suited for applications where abrasive

particles are present either from the environment or from the

products carried. Abrasive particles are less likely to embed in

metal wear strips.

For non-corrosive environments, plain carbon steel. cold

finished, is recommended. For corrosive environments, use

stainless steel, one quarter temper minimum (25. Rc). cold

finish.

STEEL

Plain carbon, cold rolled steel is recommended. Surface finish

should be 32-63 RMS. Use heat treatable grades where

available and hardened to 25-30 Rc. Lubricants used should

have rust inhibitors added.

STAINLESS STEEL

Cold rolled finish (32-63 RMS) is recommended. An austenitic

grade offers the best corrosion resistance.

The softer annealed grades of austenitic stainless steel are

NOT RECOMMENDED, especially with thermoplastic chains.

Interaction between the chain material and the soft stainless

steel might develop. When this happens, the resulting wear

debris consists almost entirely of finely divided stainless steel

particles, nearly black in color, similar to molydisulfide or

graphite. The wear of the stainless steel might be rapid while

the thermoplastic chain by contrast exhibits only slight wear.

Therefore, ONE QUARTER TEMPER (MINIMUM 25 Rc.)

austenitic grade stainless is recommended for use with

any of the chain materials, but especially with

thermoplastic. Martensitic stainless steels can also be

used. They offer excellent wear resistance when heat

treated to 25-35 Rc, but they are not as corrosion resistant

as austenitic.

BRONZE AND BRASSES

These materials are sometimes used with stainless steel

chains. A hard temper material is recommended since a soft

bronze wears rapidly. Typical applications calling for these

metals are those which require non-sparking and anti-static

conditions.

ALUMINUM

Not recommended due to poor wear resistance.

NON-METALLIC WEAR STRIPS

Non-metallic wear strips have a lower coefficient of friction than

metals. They are generally easier to install and remove and

provide for quieter operation. Nylatron® is the preferred

material, especially for dry operation at high load or high speed

conditions around corners. Ultra high molecular weight

polyethylene is also recommended for all well lubricated

applications and some dry applications.

ACETAL

Not recommended for use with Acetal chains. It is best not to

run identical plastics together.

Nylatron® (nylon with molydisulfide filler) is the preferred

material for dry applications because of its low wear rate and

low friction. It is especially suited for dry operation on

thermoplastic sideflexing chain corners.

Although Nylatron® is more stable in wet applications than most

nylons it will absorb moisture and expand. Therefore, room for

expansion must be provided and fasteners must allow for

movement.

ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE

UHMWP

UHMWP polyethylene (molecular weight of at least 1.0 million)

is recommended for both dry and wet applications on straight

runs. It is also recommended for all well lubricated corners and

non-lubricated corners where chain load and speed are low. It

is NOT RECOMMENDED for dry operation on corners where

the chain load or speed are high.

UHMWP has a wear rate equivalent to nylon in non-lubricated

applications. It is virtually unaffected by moisture and is more

resistant to corrosive chemicals than nylon. It is not as rigid as

cast nylon and may deflect when subjected to high loads from

sideflexing chains.

TEFLON

This material has perhaps the lowest coefficient of friction

available in a plastic wear strip material. It is soft and tends to

flow off the surface and is not practical as a wear strip material

except in low load - low speed applications.

LUBRICANT IMPREGNATED WOOD

Suitable for dry applications where self-lubricating properties of

the material are best utilized. Not recommended for abrasive

conditions where particles may embed in the surface and wear

the chain.

CHAIN AND

WEAR STRIP

COMPATIBILITY

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The chain flight and wear strip materials must satisfy the

requirements of the individual application. These

requirements are determined by the type of product

conveyed, and the environmental conditions discussed

on Pages 12, Multiflex. The chain flight should be

compatible with the product conveyed, and the wear

strip compatible with the chain flight.

The table below shows the recommended combination

of chain (chain flight material) and wear strip for both

straight run and sideflexing conveyors under both

abrasive and non-abrasive conditions. The chains are

listed in order of increasing cost. The wear strips are

listed in order of preference based on performance

and/or cost.

Example: Sideflexing conveyor handling aluminum

cans, no abrasion, dry operation.

Procedure: In the sideflexing chart, find the column

under NO ABRASION designated DRY. Read down the

column to the proper row for recommended chains and

chain flight material. At the bottom of the column the

recommended wear strip materials are listed in order of

preference.

Solution: Chain flight material - Thermoplastic

First choice of chain - LF880

Wear strip material - Nylatron®

For the mildly abrasive applications which fall in

between the two extremes, the choice of chain flight

material is still based on top plate and product

compatibility. Then non-metallic wear strips might be

used if the chain flight is steel or stainless steel. Or, if

the chain flight material is thermoplastic, steel or

stainless steel wear strips are used.

CHAIN FLIGHT AND WEAR STRIP MATERIALS

RECOMMENDED CHAINS AND WEAR STRIPS

STRAIGHT

RUN

SIDEFLEXING

THERMOPLASTIC

STEEL

STAINLESSSTEEL

WEAR STRIPMATERIAL

CH

AIN

FL

IGH

T

THERMOPLASTIC

STEEL

STAINLESSSTEEL

WEAR STRIPMATERIAL

CH

AIN

FL

IGH

T

CONDITION

ABRASION NO ABRASION

WELL LUBRICATED DRY WELL LUBRICATED DRY

CONDITION

ABRASION NO ABRASION

WELL LUBRICATED DRY WELL LUBRICATED DRY

S815

864

S815

SS864

C.F. Stainless Steel C.F. Steel

D820, D831

D821

DSS843

DSS963

S815

864S815

864

S815

SS864

S815

SS864

UHMWP

Nylatron®

C.F. Stainless Steel

UHMWP

Nylatron®

Lubricant

Impregnated Wood

C.F. Steel

SS881

SS881TAB

SS1874

S811, S881TAB

SS881

SS881TAB

SS1874

SS881

SS881TAB

SS1874

SS881

SS881TAB

SS1874

SS881

SS881TAB

SS1874

S811, S881TAB

SS881

SS881TAB

SS1874

LF879D880

LF882, LF882TABLF1843

DSS1873DSS3873

LF879, LF879TABLF880, LF880TABLF882, LF882TAB

LF1843LF1873LF3873

UHMWP

Nylatron®

C.F. Stainless Steel

Steel

Nylatron®

Steel

*C.F. Stainless Steel

UHMWP

Nylatron®

Not recommended

to run metal

sideflexing chains

dry** -

consult Rexnord

** Selective lubrication is required in corners. * Can be noisy in completely dry applications.

CHAIN AND

WEAR STRIP

SELECTION

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INSTALLATION

SELECTIVE LUBRICATIONMETHOD OF FURNISHING LUBRICANT

TO CHAIN THRUST SURFACE

, 1/32 Min. Ctsk. Depth

Locate

Fitting at

Proper care and maintenance of TableTop® chains will

provide smooth, efficient operation and, in turn,

extended chains and conveyor life. It is, therefore,

necessary to consider the factors that influence a "good"

maintenance program. Namely: 1) Proper installation 2)

Good lubrication 3) Cleanliness 4) Periodic Inspection

and 5) Repair and Replacement of worn components.

INSTALLATION

Before installing chain:

1. Check conveyor for flatness and obstructions.

2. For bevel design sideflexing chains, make sure outer

wear strip of each curve is about 1/32" lower than

inside wear strip to keep chain from rising up on the

outside.

3. Check sprocket alignment.

4. Pull a short (about three feet) section of chain through

LUBRICATION

of tight clearance. Make sure TAB chains have plenty

of clearance, especially on the inside of curves.

5. Rework conveyor to remove obstructions and provide

proper chain clearance.

6. Install the chain.

CAUTION: Install chain in 10 - foot sections, making

all connections on the conveyor frame. Thread

chain onto conveyor carefully to avoid twisting and

possible damage to the chain. Make sure all chains

except, 864, 1874 and 1873 are facing in the correct

direction for travel as indicated on the bottom or

side of the chain.

Start up conveyor and inspect according to checklist on

page 18, Multiflex. Correct any problem areas. Frequent

inspection and adjustment is recommended during the

run - in period to avoid any problems.

LUBRICATION

S881, S881TAB, SS881, SS881TAB, 1874 AND

SS1874 conveyors should always be lubricated.

Whenever the application permits, lubrication is

recommended. It not only reduces friction, thereby

reducing chain tension, but it also greatly improves the

wear life of chain and wear strips. Be sure the lubricant

coats both the chain and wear strip mating surfaces.

This is especially important on sideflexing chains and it

is sometimes necessary to apply the lubricant at the

entrance of the inside curves.

If lubrication is not compatible with the application, a

brief break - in lubrication application is beneficial. Apply

a light mineral oil to sideflexing chains prior to

installation. Also, apply oil to TableTop® base roller

chains prior to installation.

Some types of lubricants an lubrication methods are

described here:

TYPES OF LUBRICANTS

A. Oil Base Lubricants - These are vegetable or mineral

oils which offer high lubricity and coat the corrodible

chain parts. They should be used whenever practical

on all metal chains.

B. Water Soluble Lubricants and Soaps - These are

excellent lubricants and many of them help clean the

chain. Since the water is the conveying medium, they

are primarily suited for chains having corrosion resistant

parts or those with corrosion resistant top plates.

C. Water - Can be used as a lubricant although it is not

as effective as other types. If water is used as the

lubricant for plastic chains, sliding on a stainless steel

pan, the drag on the chain may be increased since a

thin film of water must constantly be sheared.

METHODS OF LUBRICATION

A. A central plumbing station meters lubricant under

pressure to locations through piping arrangement.

B. Sideflexing chains may be lubricated effectively by

applying the lubricant directly to the thrust surface below

the top of the flight as the chain enters the curve.

C. The lubricant drips onto the chain from an overhead

storage tank.

D. Bar soap with dripping water applied directly to the

chain.

E. The return chain strand runs through a pan of

lubricant.

F. The return chain contacts wheels of porous material

which rotate in a lubricant supply tank.

Locate

Fitting at

Commercial Grease

Fitting

TYPICAL

INSTALLATION

AND

MAINTENANCE

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CLEANING

REPAIR AND REPLACEMENT

CLEANING

In many applications, rapid build-up of grease, dirt, grit,

sand, spilled syrup and beverage can occur. These result in:

1. Soiling and damage to the conveyed product.

2. Increased work demands for the chain and motor.

3. Accelerated sprocket tooth wear.

4. Conveyor pulsation and wear.

5. Excessive chain wear on the flight and in the joint areas.

6. Rapid wear of the wear strips.

Frequent cleaning of the chain and conveyor frame is

advised. Such agents as steam, warm water and soap are

commonly used. Many times combined "cleaners/lubricants"

are applied continuously. Strong caustic agents used with

metal chains should not be used with plastic chains. Always

rinse cleaning agents completely off of chain and conveyor

frame. When excessive amounts of syrup or other liquids,

broken glass or debris accumulate, cleaning will be required

on a regular basis to remove these undesirable materials. It

is advisable to have operating personnel keep brushes and

cleaning solutions nearby to remove broken glass and

excessive spillage.

CAUTION: ALL cleaners and lubricants must be

compatible with chain and conveyor materials. See

Page 13, Multiflex.

INSPECTION

In the course of conveyor operation, periodic inspection of

the chain, sprockets and system is required to detect faults

and make repairs before serious damage occurs. the

important thing is to set up a regular inspection and

maintenance schedule.

CHECKLIST

1. Look for unusual wear patterns on the chain.

2. Inspect chain for lack of top surface flatness.

3. Check for excessive gap between flights due to jam-up or

overload.

4. Pulsating, jerky chain operation indicates poor lubrication

or a conveyor obstruction.

5. Check dead-plate and turnable clearance.

6. Examine sprockets for signs of excessive wear.

7. Examine sprockets for signs of dirt build-up in tooth

pockets.

8. Check for sprocket guide ring wear and possible chain

misalignment.

9. Check the ways and wear strips for excessive wear.

10. Inspect lubrication system for proper operation.

11. Check the inside of curves and the supporting conveyor

frame for excess heat build-up which may indicate an

obstruction in the curve or a high friction area.

12. If return support rollers are used, check to insure rollers

are free turning.

REPAIR AND REPLACEMENT

Any malfunctions found during an inspection usually stem

from one or more of the following conditions:

1. Severe overloads, jam-ups or wedging of broken glass or

crowns.

2. Severe back-flexing of chain on the return carrying ways.

3. Poor lubrication or no lubrication.

4. Interference and obstruction.

5. Worn sprockets.

6. Poor conveyor design.

7. Badly worn or damaged chain.

These causes should be corrected to avoid future problems.

INSPECTION

Chain and sprockets should be replaced when:

1. The chain measures approximately 123 inches in 120

flights for 843 and 1843 chains; in 40 flights for 2500

chains; in 61 pitches for 1700, 1701, 1701TAB and 1702

chains; and in 80 flights for all other chains.

2. The chain jumps the sprocket.

3. The flights have worn to about one-half the original

thickness.

4. The conveying surface becomes uneven through wear.

5. The thrust surface of sideflexing chains wears away and

exposes the rivet or other metal parts which may cut into

wear strips or other conveyor component.

6. The sprocket teeth develop a hooked profile or the chain

tends to "hang up" on the sprocket teeth.

These suggestions on chain and conveyor care serve as a

guide toward maintaining continuous, trouble-free operation.

Implementation of a conscientious programmed

maintenance schedule will lead to many productive hours of

conveyor operation.

INSTALLATION

AND

MAINTENANCE

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