130383344 Ship Installation Brochure

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Spurs Marine Mfg, Inc. * 201 S.W. 33rd Street * Ft. Lauderdale, FL 3331

Visit Our Website at: www.spursmarine.com * E-mail: [email protected]

Phone #: 954-463-2707 Fax #: 954-525-0239


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SPA$S' consistsof two main assemblies.One or more rotating cutting bladesare attachedto a vessel'spropeller hub. A stationary cutting blade is attached to the rope guard or strut.Srhen lines or debris are caught by the propeller, they are instantly cu t free with eachrevolution of the shaft.

hile the concept of Spurs - cuttingl ines - is s imple, the technologyinvolved in making them performdependably over milliorrs of rniles isextremely sophisticated in terms of

design, materials, and precision manufactur-ing. Years of research and test ing haveresulted in a patented system that is as reli-able and du rable as it is effective.Precision machi ned, heat treated arrd hard-ened stainless steel metals, high techhydrophili


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SPA4S' use he propeller's otationand its inertial force to power the cuttingaction. As a line enters th e propellervortexT it is wound toward the propellerhub. Without Spurs installed, th e linewould continue to wind itself tighter andtighter, eventually entering into the spacebetween propeller hub and rope grrard,where it can cause damage to the oil seals.Vith Spurs, the line is engaged by therotating cutter blades and delivered tothe stationary cutter blade. The suddenresistanr't 'sensed by th e starionary su11r,1

wedge forces a cam action that causes therotary blade to be pushed aft, meeting therotat ing blade and instantly severinsthe obstruction.The cut t ing force increases in directproportion to the resistance sensed byth e stat ionary cutter wedge assembly.This shear ing act ion means that thel inc is cut an d washes away beforeentanglement occurs. After th e line ornel l las lreen cul. th e stat i r )nary ( :ul terblade returns to a neutral posi t ionawaiting the next cutting event.

Fig.1 Stationary uttercenters tself nthe cutter guides as it passesthroughwith each revolutionof the prop.

Rotating

Cutterguides

cutter assemblyfastened topropeller

Stationarycutter assembly

Stationarycutter

ff$:al o'|":

Fig. 2 Wedge action takes over, drivingstationary blade against rotary blade


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he photo below shows"

SPA$S" Line Cutter cutter assembly with two shoulder bolts and .015 shimModel LV-60148complete and mount edto the spacers between the rotary and stationary cuttingpropeller hub. The cutter is made up of two blade as shownbelow.separate assemblies: he rotary cutter assembly,

typically with 2 blades mounted 180' apart ; and thestationary cutter assembly mounted into the rope guard.The propeller hub is drilled and tapped, then the rotarycutter assembly is fastened with stainless steel screws.The stationary cutter assembly is married to the rotary

The workman in the photo is grinding and preparing thestrut recess n preparation for the rope guard installation.We recommend a 314' hick rope guard to be installed whena line cutter is used. "Ihe 314" ope guard provides the extrastrength needed for cutting a large hawser or heary nets.

SpursLargeVesselLineCutterMountedOnPropFace


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SpursLargeVesselLineCutter nstallationComplete

he photo above shows a completed installation of$FU&S"fine CutterModelLy-60148.A ox ohold th e stat ionary cutter assembly ha s beenwelded into the rope guard; the stationary cutter

assembly is screwed and dowel pinned into the welded boxand is easily removed and replaced for serwice. The rotarycutter assembly is fastened and mounted to the propellerhub. The cutter blades always remain .010 - .015 apartdue to a guide mechanism and a dampened but movablecutter shaft that is built into every cutter. The rotarycutter an d stat ionary cutter assemblies have ha d th e

marrying screws and .015 shims removed and now operateindependently as opposing blades. The propeller has beenrotated to verify clearances between the two opposingblades. As the cutter blades pass during each rotation,there is no contact . This assures no wear and nomaintenance. Flowever, when a line is cut or the propellershaft moves forward or aft (end play), the cutter bladescontact, but only for one quick adjustment during a singlerevolution. The rotary cutter guide automatically centersthe stationary cutter block. This centering adjustment willoccur either in forward or reverse.


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-'*+-r.-;'

he typical Large Vessel Cutter is easilyretrofitted and installed on vessels with oilseal bearings. The cutting blades are madt:of 774 pH stainless steel, he hardest metal

known to remain stable under saltwater. They arehardened to approximately 4i3-45 Rr.rckwell C tornaintain the sharpest edge. The rernainder of thcr(xrtter parts ar


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purs Cutter Systemsare designed o track and follow Lf4" aft for a full Lf 2" . Tlis allows the Cutter System to con-the ships' a-xialshaft movement 1/4" forward and standymaintain a spaceof .010-.015 etweenblades!

RotaryCuttermounted npropellerace

Figure2. MountingPlatesare astenedto propeller ace betweenRotaryCutter Bladesassuringa smoothsurface or StationaryCutterRoller ohydroplaneagainst

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Figure3. LargeVesselCutterAssemblycomplete;RotaryCutter & StationaryCuttermarriedtogether

Optional InstallationRotary Cutter can be inserted nto apre-milled pocket in propeller faceeliminating the need for theMounting Plates

MountingPlatesFastened oPropellerFace

Figure1. StationaryCutterAssemblyfor Medium Vessel& SmallVesselInstallation

t:n+/ PropelterHubStandardodelsAvailablenStock Minimumpaceetweenprops 'sternube X=Mountingurfaceheight Minimumpaceetweenrope uard prop

LV60/48MV40/32MV32t24MV24119MV19/15sv15^2

NA*" 1.750"44.45mm)

7,305"185,55mm)3.875"98.43mm)3.875"98.43mm)3.620'91.95mm)3.250"82.55mm)2.50"63.5mm)

-.250"5.35mm)

*Toachieveinimumpace etweenropellerndRope uard1) heRotary utter ust esetintohePropellermill ocketed)500"r 2) 500" ountinglatesust eastenedo hePropelleraces nFigureahove.


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hrusters,LDtives and otherpropulsion components replacement.This is causedby excessivewear due to waterneed he protection"f SpAnS. The most com- intrusion.Guard against lines damaging thruster oil sealsmon repair on thrusters is seal damage and gear by installing SPUnS'Cutter Systems.

Figure . Seal ailure ueto lineandnet ntrusionon ypical hruster nitWithouta SP{/&$'CutterSystemnstalled

Figure5. OptionalFlushMounted(FM)RotaryCuttermilled nto pocket of mountingplatewhich is fastened opropeller ace. RotaryCutterBladescan also be mountedinto a pre-milledpocket directlyon the propeller ace.

Figure6. FlushMounted(FM)Gutterinstallation ompletewith RotaryandStationaryCuttersexPosed.On Z-Drive hrusterunit, spacebetweenpropeller& rope guardcan be as smallas .050".The shaftendpfay on Z-Drive and Thrusterunits isapproximately 001 to .005".


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Spursuse he propeller'sotationand inertialorce o power he cuttingaction.NOTES:Remove opeguard'Flameblow & grindall old welddebris rom the weldedareawherelheropeguardwill be remou

Centering armlocking screwst^

\Centering arm wheelsInto bore Liner tlange or shaft

- '>

A. PositionCutterDrillTemplate n pro-peller ac ewith cutterbladebehind heleading dgeof the propetterOtade. see 1)B. Note: Al l rotating uttersmust be equaldistance rom center!Use emplate enter-in g arm o locate utter romshaft o uoDeredgeof prop ace, hen oc kscrewson cen-teringarmslide.Use markingpencilorscribe o draw outline f templateon pro-pellerface. se e 1)Repeataboveprocedure or oppositepro-pellerblade.Do not altercentering rm oncepositionedn place.Move emplate180"from irst ayout or our-blade ropellers,(144" orfive bladepropeilers). see 3 & 4)

C. Holdingemplaten place, rill hroughbottomcenterhole irst,using3/8" spottjngdrill provided)pproximately /8 "deep.Thenuse P" sizedrill o complete ole1, 'deep.Then ap with3/8" x 16 ap approximately3/4" deep. see 2 & 3)Us e3/8" x 1 3/4' SHCS n bottomhole.lvlountemplate.No w repeatprocedure ordrilling& tapping he other ou r notes.Removeemplateand repeatprocedures nopposite otatingblade ocationwith em-plate.(see 3)

D. Beforemountinghe rotary utterblades,qualify wo or moresufaces under he cuttermount ocation:hesesurfacesMUSTbewithin he sameaxialplanewjthin 005 n.(see4)E. MPORTANT: he cutter mountingholesmust be drilled,but do not mount rotarycutter blades onto propeller untit propelleris on the shaft and in place. (see5)

F, Withpropellers ompletelymounted,rotatepropeller ntilon e set of drilledholesare 45' degrees rom op centeron ,,up,,(preferred), r "down"side. see 3 & 5)

G. Mount otarycutterblades o prop("Leader" otarycutterbladeon top,"Follower" n oppositeside). se e 5)NOTE: The rotarycutterbladesareemarkedas "LEADER" r "FOLLOWEROTARY LADE. he "LEADER" asgroovewhich s ,015 mallerha n heLOWER" lade.Thisgroovespacingfo r possible xialmisalignment f pro

H. Marry he stationaryutterassembthe mountedrotarycutter ("Leader").are wo 3/8" x 1 3/4" shoulder crewsnuts or hi spurpose. NOTE:wo shimbe between otaryand stationarybladewhenmarryinghe wo assembliesl.s

l. Usingplastlc ransfer aper,or meatape,mark rom op center ineon proto upperedge of cutterbox. Transfermeasuremento rope guard.Then,usmarkjng enci l , nd Spurs ' th in lumicutout emplate provided),ransfer uonto uppersectionof ropeguard.Theguardcutoutshouldclear he stationate r box by approximately125" .025"threesides. se e 6, 7 & 8)

la . Th e Stationary utterassemblyEeGuardcut-outshouldbe locatedat aopmately10:30 ooking orwardon a righhand urningpropeller nd 2:30on a lehand urningpropeller.NOTE:OnlyONRopeGuardcut-out or eachpropelle

#1 : Dri l l&tap center#2 :Mounttemplatewith 3/8" x16 SHCS

Stationarycuf -'-_ter assemblr-

,/Stationarycutter box

g


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J, Flame ut he cutoutpattern n upperhalfof ropeguard.NOTE: opeguardmustbe 1from propeller ace in most cases.(see 9)

K. Flameblow an dgrindal ldebris rom areawhere opeguardwillbe mounted (see 10)

L. Weldboth halves f ropeguard o strutan d weldendsof ropeguard ogetherbeforeweldingstationary utterbox. Makesurebo x s approximatel y /8 " o 1/4" clealof ropeguardon al l hreesides. see 1 1)

M. NOTE:Cutterbo x ma y protrude boveropeguardand need o be rimmed oapproximately /4 " above opeguard.Fo rth e bestwelding esults, ra wa linearoundedgeof cutterbox where t meets op eguardat 1/4" above he ropeguard.Remove nd lamecut box before t is weld-ed into he ropeguard.Stationary uttermust be disassembled, nd box rimmed,then reassembleO-se e 12 & 13)

N. Withstationary utterassembly emried,proceedwithweldingstationarybox to th e ropeguard.First, ack-weldte r box as shown, he nslowlyweld arokeeping xcessheat ro m he stationater. (see 13)

O. Installations complete.Removeshimsan d spacer ha t marryboth cutassemblies. isually echeck o ensurremoval as beencompleted. see 1

P. Rotatepropellero checkclearancuttersas he y pass hrough followrotaryassembly roove. se e 15)

llediurn Vessel Cutters andZ-Drive Units will he

supplied n'ith irrfiridualinstallation instru ctio ns.

Temporary 1 " weld-ments to align ropeguardwith prop fac In,-, Shimstr

---1 /8"to1 4"gap

^s1.*19111 stationarycutter assemblY


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130383344 Ship Installation Brochure