Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 2048 (1983): Parallel Keys and Keyways [PGD 31: Bolts,Nuts and Fasteners Accessories]

UDC 621.88~8 ( Second Reprint MARCH 1993 ) IS : 2048- 1983

Indian Standard

SPECIFICATION FOR

PARALLEL KEYS AND KEYWAYS

( Second Revision /

I. Scope- Covers the dimensions and tolerances for parallel keys and keyways.

!. Types - The keys shall be of the following types:

Type A - Keys with both ends round.

Type B - Keys with both ends square.

Type C - Keys with both ends round with hole for one retaining screw (for sizes 8 X’7 and upwards and for key lengths above the stepped line in Table 4 1.

Type D - Keys with both ends square with hole for one retaining screw ( for sizes 8 X 7 and upwards and for key lengths above the stepped line in Table 4 1.

Type E - a) Keys with both ends round with holes for two retaining screws ( for sizes 8. X 7

and 10 x 8 and for key lengths below the stepped line in Table 4 ),

b) Additionally provided with tapped hole for one or two jacking screws for sizes 12 x 8 and upwards.

Type F - a) Keys with both ends square with holes for two retaining screws ( for sizes 8 x 7 and 10 x 8 and for key lengths below the stepped line in Table 4 ).

b) Additionally provided with tapped hole for one or two jacking screws for sizes 12 x 8 and upwards.

Type G - Keys with both ends square with chamfer and hole for one retaining screw.

Type H - Keys with both ends square with chamfer and holes for two retaining screws.

Type J - Keys with both ends square with chamfer and hole for one spring dowel sleeve.

Note-Types A, C and E are meant for machine tools application also,

3. Dimensions

3.1 Keys - Dimensions for keys are given in Table 1 read with Fig, 1.

3.1.1 Retaining screws, jacking screws and spring dowel sleeves for keys are given in Table 2. -

3.2 Keyways - Dimensions for keyways are given in Table 3.

3.3 Preferred length and weight of keys - Preferred length and weight of keys is given in Table 4.

4. Designation - designated as:

A parallel key of Type A, width 12 mm, height 8 mm and length 50 mm shall be

Parallel Key A 12 x 8 x 50

4.1 If keys of Types E and F from 12 x 8 size upwards are required to be supplied wiaout holes for jacking screws ( OS ), this shall be stated when ordering. In this case the designation for a key of Type E, width 12 mm, height 8 mm and length 50 mm shall be as follows:

Parallel Key EoS 12 x 8 x 50

Adopted 17 January 1983 I

@ December 1983, BIS I

Gr 5

BUREAU OF 1NDlAN STANDARDS MANAK BHAVAN. 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

. .

c

I

.̂ ”

lS:2048-1983

N9 d

t I .,

P hi SECTION XX P

TYPE A TYPE B

I--’ SECTION YY t-

TYPE C TYPE D

TYPE E lb)

[*I ib)

TYPE F

fi!zzB SECTION XX

@ SECTION YY

SECTION 2.2

SECTION 22

TYPE G TYPE H

SECTION VV

TYPE J

Note - Types A, C and E are meant for machine tools application also.

FIG. 1 DIMENSIONS AND TYPES OF KEYS ( see Table 1 )

2

L___II__^___ ..__,.-.-

IS :2048-1983

TABLE 1 DIMENSIONS FOR KEYS

( Clause 3.1 and Fig. I )

All dimensions in millimetres.

b Tolon b h Tol on h* a s Range of Key Length Range of Key h9 I Length

( for Machine Tools Only )

-____~ _____~~~~ __

Min Max Min Max Min Max ~~~ -

2 2 - 0.16 0.25 6 20 - - 0 - -- .

3 -0’025 3 -to25 _ 0.16 0’25 6 36 - - - _

4 4 0’16 0.25 a 45 10 45

5 Jo30 5 -:.030 - 0’25 0’40 IO 56 I2 56 --- _ _ --

6 6 - 0.25 0’40 14 70 I6 70

3 7 3 0’25 o-40 I3 90 I 20 90 -_- -~

IO -:*036 a 3 0’40 0.60 22 110 25 110

I2 a -co90 3 0 ‘40 0.60 28 140 32 140

14 9 3’5 0’40 0’60 36 160 40 160 --

I6 Jo43 10 4 0.40 0’60 45 180 45 180 __ -- _____

ia II 4.5 0.40 0’60 50 200 50 200 _ -. -

20 I2 5 0.60 0.80 56 220 56 220

22 I4 5’5 0’60 0.80 63 250 63 250 0 -

25 -to52 14 -omllo 5’5 0’60 0.80 70 280 70 250 __--

28 I6 6’5 0’60 0.80 a0 320 80 250 --

32 ia 7 0’60 0.80 90 360 90 250

36 20 a 1’00 1’20 100 400 100 250

40 0 -0’062

22 9 1’00 1’20 110 400 110 250 --

45 25 -:.I30 10 1’00 1’20 125 400 - - Pm -____

50 28 11 1’00 1.20 140 400 - - ____ .~-

56 32 13 I.60 2.00 160 400 - -~

63 32 I3 1’60 2’00 180 400 - -

70 -00~074 --$- --

-:*I60 14 1.60 2.00 200 400 - -

- - -- 80 40 16 2’50 3’00 220 400 - -

-___ 90 45 ia 2’50 3.00 250 400 - -

o - 100 -0.087 5. 20 2’50 3.00 280 400 - -

Note - Keys with b = 4 to 40 are meant for machine tools application also.

*ToI on h : Square Section h9; Rectangular Section hll.

3

1S:2048- 1983

TABLE 2 DIMENSIONS FOR RETAINING SCREWS, JACKING SCREWS, AND SPRING DOWEL SLEEVES FOR KEYS

( Clause 3.1.1 ) All dimensions in millimetres.

Key - bxh

__ d:, 2x2 - --- _ 3x3 -

4x41 - 5x5 -

6x6 - 8x7 3’4

10x8 ---- 3.4 12x8 4.5 14x9 5.5 _~__ 16x10 I 5.5 P

- Holes for Retaining Screws, Jacking Screws and Spring Dowel Sleeves

Kf?V Retaining

Shaft Screw?

13 15 : 6 ----I-- de 12 Sleeve$ -m-m--_-

- - - - - _ - - _ ------ - - - - - _ - - --Pp--

- - - - - - - -- -~----

- - - - - - - - ------- - - - _ - - - - _ ---m__-- -

-~- 4 M3 45 4 _;- PC

7 M3x8 4 M3 4.55 _ 8

_ ----~ -.-~- - M3xlO

5 M4 5’5 6 10 7 . . ---&I5- 6 6.5-6-T _ 8

M4xlO

--7 6 -6:5--6-77 M5x10 . M5xlO -m- 7 M6--Q- ---ii- 6 -%-- M6x12 -

8 M6 9 --21 6 10 M6x12 ---w--- 8 M6 9 13 10 - M6x16

--iiT-- M8 ___8_ 11 9 1512 M8X16 --_ - -- __- -- 10 Ml0 13 9 16 18 MlOx16 ; ___--- -- 12 Ml0 13 10 7 16 I

14 --- Ml2 -on-I- 17 --iL.- __.l_ MlOx20

12 20 -- I M12x25 /- --~ 16 Ml2 17 12

-- _ 20

-IS- .--

Ml2 17 15 33

20x12 6.6

22x14 6.6 25x14 9.0

28x16 ‘71 ____~__ 32x18 11 36x20 14

40x 14 45x 14

50x28 14 56x32 14

63~32 14 70x36 18

80x40 18 90x45 22 --

100x50 22

.__- __ 14 M8 .-_-- 18 Ml0 -

‘-i8 _. -

Ml0 .__- 20 M12- w-p 20 Ml2 --p 20 Ml2 -- __ 20 M12 ._____ 20 M12 -p___ 20 Ml2

4x8 ’ -__ 4x8 -~ 5x10 6x12 -- - 6x12 8X16 8X16 -~-

-8x16 --- _ 10x20 ___-

i 12x24 ___- 12x24 ___- 16x30 -- 16x30 -- 16x30 ~ - 16x32

16x32

16x32 20x40

20x40 25x40 ~- 25x50

-18- - M12x25

18 _-_ ~--:--_-_ M12x30 -3 12 19 18 6 Ml2 17 M12x30 -1

- 6 _Mi2_17

--__- 13 20 18 M12x35 -- ___

1

I-26- I--%16 /-&+-%- <O- T-%-- -2O- -18- .- ~--- M12x35

76---G- - -- __ 12 7.3 __ __- 12 7’3 - _~_ 16 8.3 __ __~_ 16 8.3 --- ___ 16 8,3 16 8.3- -p 16 8.3

iT R~R

HOLE FOR RETAINING SCREW HOLE FOR JACKING SCREW

HOLE FOR SPRING DOWEL SLEEVE

- Note - Retaining screw and jacking screws are meant for machine tool applications also. i

*Dimensions for countersinks and counterbores.

TRetaining screw: cheese head screw conforming to IS : 1366-1982 ‘Specification for slotted cheese head screws ( second revision ) ’ or hexagon socket head cap screw conforming to IS : 2269-1981 ‘Specification for hexagon socket head cap screws (second revision ) ‘.

IDowel sleeve conforming to IS : use in foundries ‘.

5988-1970 I Specification for spring dowel sleeves ( light and heavy patterns ) for

4

IS:2048;1883

TABLE3 DIMENSIONS FORKEYWAYS

(Clause 3.2)

All dimensions In millimetres.

SECTiON XX

DETAIL AT A

Keyway Keyway for Machine Tools Application

Tol on b h TOl 1. TOI -____ on an

Running fit Light drive flt Force fit t, ta on 0"

Shaft Hub Shaft Hub ShaftandHub 1, f.

H9 DlO N9 Js9 P9 -_ -- ___------

--_%_- 8 2x2 2 +0'025 -0'004 f00125 -0.006 _ 1'2 1'0 0'08 0'16 -- -- s-!o- 3x3 3 0 -0'029 --0'0125

-~-

10 -- 12 4x4 4 0

12 17 5x5 5 +ro30 +0'076

_ +0'030 -0'030

17 22 __6xs,6

22 30 +0‘096 0 30 +0.040 -0'036

-_-- ~- 36 44 12x8 /1p

44 _50_ 14x9 14 f0'120 _50_ -_ 58 16X10 16 +0.050 $043

58 65 18x11 18

65 75 20x12 20

75 _85_ 22x14 22 +0,149 0 ss-_93_ 25x14 25 +0'065 -0.052

-p--1 110 95 28x16 28

y- --

+:'06, +0.180 0 +0'031 0 -0'026 13'0 +0'050 -0'062 -0'031 0 -0.088 - ---

15'0 10'4 0.70 1'00 ,- -_

___ ___ 380 440 90x45 I 90 -__ _ _ __~ .__ _ +0'087 440 ! 500 100x50 100 0 ;:::;: 1 -;.,,87 ‘;:;:;;

-

z ,

IS : 2048 - 1983

TABLE 4 PREFERRED LENGTH AND wmm 0F KEYS

( Chose 3.3 )

Preferred Length

(')mm 1 2x2 / 3x3 1 4x4 ) 5x5 ) '6x6 i

Key(bxh),mm

6x7 / 10x6 / '2x8 / ,4x9 ) ,6X,0 j 18x.U 1 *0X,2 ) 22x14 / 26x14 I.*BXl6 1 32x18 / 36x20 1 40x22 / 45x25 / 50x28 ! 66x32 163x32 j 70x36 1 80x40 1; I , I

*Weight for Keys Type B,kgltWO Pieces ( APPW. )

--- --

__E?_- __ -'__

Note-For machine toolsappllcation for keys (bxh ),4x410 40x22 preferred length (/) ranges from IO to 250.

*For calculations of weights, density of steel taken as 7'85 o/cm'.

6

lS:2048-1983

5. Tolerances on Length of Keys and Keyways

Length of Key mm

Up to 28

32 to 80

90 and above

Tolerance on

Key Length Keyway Length mm mm

- 0.2 + 0.2

- 0.3 + 0.3

- 0.5 + 0’5 -

6. Error of Symmetry and Parallelism

Diameter of Above 10 12 Shaft

b

X 1 4 0.1 ( 0.16 1 0’2 1 0.3 1 0.4

ThrMkterial of Key - Steel of tensile strength not less than 600 MPa shall be used as material

8. Packing

8.1 Packages shall be made in such a way that keys are protected against mechanical damage in transit.

9. Marking

9.1 Such marks as may be specified by the purchaser shall be marked on the top or bottom surface of the parallel keys or in the packaging containing keys.

9.2 Cerfificafion Marking - Details available with the Bureau of Indian Standards,

EXPLANATORY NOTE

parallel keys and keyways were formerly covered in IS: 2048-1975 ‘ Specification for parallel keys and keyways ( first revision 1 ‘. However, parallel keys and keyways meant for machine tools were covered in IS : 2710-1975 ‘ Specification for parallel keys and keyways for machine tools ( first revision ) ‘.

The dimensions and tolerances of keys of sizes 4 x 4 to 40 X 22 covered in IS: 2048-1975 were exactly the same as those covered in IS : 2710-1975. which specification was applicable to machine tools. Only the range of key lengths and dimensions of keyways differed for machine tool applications.

ln the present revision of IS : 2048, the requirements of keys for machine tools including the range of key lengths and details of keyway have been incorporated. In addition, the original range of sizes 2 x 2 to 100 x 50 as also the types A to J have been retained.

This version of the standard ( IS : 2048-1983 ) shall supersede IS : 2710-1975 after its publications.

.

7

Printed at Simco Printing Press, Delhi, India

AMENJMENT NO. 1 SEPTEMBER 1986

TO

IS:2048-19133 SPECIFICATION FOR PARALLEL KEYS ANI KEYWAYS

(Second Revision)

(Azge 7, cZause 6) - Delete clause 6 along ’ with figure ard informal table.

(EDC 44)

Printed at Simco Printing Press. Delhi. lndla

AMENDMENT NO. 2 OCTOBER 2005TO

IS 2048:1983 SPECIFICATION FOR PARALLEL KEYS AND KEYWAYS

(Second Rev&ion)

[ Page 7, clause 6 (see also Amendment No. 1 ) ] — Insertthe following new clause 6 after 5:

6 ERROR OF SYMMETRY AND PARALLELISM

bA

Diameter of Above 10 12 17 22 30 38 44 50 58 65 75 85 95 110 130Shaft

up to 12 17 22 30 38 44 50 58 65 75 85 95 110 130 150

b 4 5 6 8 10 12 14 16 18 20 22 25 28 32 36

.Y 0.1 0.16 0.2 0.3 0.4

(PG30)

Reprography Unit, BIS, New Delhi, India