Ingersoll-Rand 7871-F-( ) manual Grinding Wheel Mounting Instructions, Mandrel Overhang Dimension

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GRINDING WHEEL MOUNTING INSTRUCTIONS

M10

Disconnectairsupplyfromgrinderorshutoffairsupplyandexhaust(drain)air lineofcompressedairbeforemountingorremovinganyabrasivewheelorwire brush,orotherwiseperformingmaintenanceor serviceto thetool.

Checkgrinderspeedbeforemountinggrindingwheel(orothertypeaccessory) withareliabletachometertomakesurethattheactualspeedofthegrinderdoes notexceedits ratedfreespeed.

Checkoperatingspeedofgrindingwheelorwirebrushtobeusedwiththegrind- er.The maximumoperatingspeedmarkedon the grindingwheel,blottersor packaging,shallequalorexceedtheratedfreespeedofthegrinder.Also,the typeandsizeof thegrindingwheelorwirebrushshallbecompatiblewiththe grindersizeandtype.

Check abrasive wheels prior tomounting for chips or cracks. Cracked or wheelsshallnotbeused.

Caremustbetakenthatagrindingwheel,or wirebrush,ofthecorrectspeedrat- ingisused.RatedwheelcapacitiesforArogrindersaremaximumonly.Regard- lessoftheratedcapacityandspeedofanyArogrinder,abrasivewheelsorwire brushesshallneverbeoperatedata speedgreaterthanthatrecommendedby thewheel(orbrush)manufacturer.

DressingAbrasiveWheels.Uponmountingagrindingwheel,thetoolshouldbe operatedat graduallyincreasingspeedandcheckedfor goodbalanceofthe wheel.If unbalanceisobserved,thewheelshallbedressedIf.dressingfailsto establishacceptablebalance,thewheelshallnotbeused.

MOUNTING INSTRUCTIONS FOR MOUNTED WHEELS

FOR USE WITH 33226-( ), 41753-( ) OR 44127-( ) COLLET ASSEMBLIES.

Thecolletshallbecheckedtoassureitto beingoodconditionandproperlyaf- fixedto thegrinderspindle.

Themandrelshallbeinsertedtothefulldepthofthegrippingjawsofthecollet.At least1/2the mandrellengthshallbeinsertedintothecollet.

Themaximumsafeoperatingspeedformountedwheelsshallbedeterminedby thefollowing:1.)Shapeandsizeofthemountedwheel,2.)Sueofmandreland

3.) Overhang of mandrel. Inno case shall the maximum safe operating speed rec- ommendedbythewheelmanufacturerbeexceeded.

WARNING:Workpressure,If excessive,canbethe causeof troubleanda

 

sourceof danger,thru bending or fracture of the mandrel.Pressurebe-

 

tweenthewheelandthe work should neverbeso heavythat springing of

MANDREL OVERHANG - DIMENSION “0”

the mandrelwill result.

 

FIGURE 1

IMPORTANTNOTICE:Increasingtheoverhangofthemandrelwill reducethemaximumwheelsizethatcanbesafelyusedwith thespeedofthetool (dimen- sion “O”,figure 1).Also,the lengthanddiameterof mandrelcombinedwith thesizeandshapeof thewheelaredeterminingfactorswhich mustbeconsld- eredwhenselectinga mountedwheelthat will becompatiblewith the ratedfreespeedof the tool. lt Is recommendedthe “Tablesof MaximumOperating Speedsfor MountedWheels”of the AmericanNationalStandardpublication B7.1-1978previously mentionedor other reliablesource,beconsultedto determinethe safeoperatingspeedof a particular size and shapeof wheel combinedwith the size and overhangof mandrel.

MOUNTING INSTRUCTIONS FOR TYPE 1 GRINDING WHEELS

Thedrivingflangeshallbeinspectedtoseethatit isoftherelievedtype,thatits

shallhaveareliefandcontactfaceidenticaltothedrivingflange,placedtoward

diameterisatleast1/3thediameterofthewheelandthatitisfreeofnicks,burrs

theblotter.

andsharpedges.Ablotter,separateorattachedtothewheelandatleastthedi-

A spindleendnutshallfollowtheouterflange.Holdspindlefromrotatingand

ameterofthedrivingflange,shallbearagainstthedrivingflange.Thewheelshall

beplacedonthespindlefollowingthefirstblotterThe.wheelshallnotfittoo snug-

screwspindleendnutsfirmlyagainsttheouterflange,butonlytightenoughto

ly nortoofreelyon the spindle.The normaldiametralclearancebetweenthe

insuresufficientfrictionontheblotterfacestodrivethewheel.Excessivetighten-

wheeland the spindleis approximately.007”(.17mm)maximumAbrasive.

ingcandistorttheflanges.Thespindleshallprojectflushwithorpasttheendof

wheelswhichdonotproperlyfitthespindleshallnotbeused.Separatereducing

thespindleendnut.Tosecurewheelsthinnerthantheunthreadedlengthofthe

bushings,unless supplied or recommended by the abrasive wheel manufacturer,spindle,spacershallbeusedbetweentheflangeandthespindleendnut.Such

shallnotbeusedto adaptlargerholeabrasivewheels.

aspacershallbeaprecisionpart,withparallelfacesrunningtruetothespacer’s

Asecondblotter,separateorattachedtothewheelandatleastthediameterof

centerhole.

 

theoutsideflange,shallfollowthe wheelon thespindle.An outerflange,the

Thesafetyguardshallbeproperlypositionedandthemountingcheckedtoas-

samediameterasthedrivingflange,shallfollowthesecondblotter.Theouter

suresecurepositioningThe.guardcovershallbeclosedandsecured.

flange

 

MOUNTINGINSTRUCTIONSFORTYPES 16,17,18,18R AND 19 CONEAND PLUG WHEELS

FOR USE WITH 37292-( ) WHEEL ADAPTER

Thedrivingflangeshallbeinspectedtoseethatit isoftheflat,unrelievedtype, diameterofthedrivingflange,shallbearagainstthedrivingflange. thatitsdiameter isleastat 1/3 the diameterofthe wheel and thatitisfree of nicks,

burrsandsharpedges.Thegrinding wheel shallbetightened on the spindlebyhand and shall bear firmly againsttheblotteranddrivingflange.Ifthewheelcannotbesecured,thespindle

The spindle and wheelthreads shallbe inspected toseethat they are of the same length shall be checkedIfthe. spindle lengthiscorrect andthe cone wheel still wilI pitchand diameter and ablotter, separate or attached tothe wheel and atnotleastfitfirmlythe againsttheblotter and driving flange,thewheel shallnotbe used and

a properfittingwheelshallbeselected.

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Contents Cedures Series Short GrindersAt the air inlet of the tool Operate at 90 p.s.i.g .2 bar/620 kPa maximum air pressure Failureto Observethe Followingwarningscould Resultin InjuryRecommended Lubricants Routine Lubrication RequirementsAIR Supply Requirements Model Identification Safety Guide for Portable Grinder USEOperation DON’TGrinding Wheel Mounting Instructions Mandrel Overhang DimensionMounting Instructions for Mounted Wheels Mounting Instructions for Type 1 Grinding WheelsHead Section Disassembly and Assembly of ToolsMotor Section Typical Cross Section of Tool Motor Section DisassemblyAssembly Head Section Head when assemblingRemove nut 36776 and valve components From headDisassemblyassembly 41753- 3-PIECE Collet Assembly AccessoriesErickson 3-PIECE Collet Assembly LOCK-OFF Lever AssemblyDimensional Data Trouble Shooting

7873-F, 7872-F, 7870-F-( ), 7871-F-( ) specifications

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