Thispencil die grinder is primarilydesigned for use withbonded abrasivemounted point grindingwheels. It may also be used with steel rotary files and carbide burrs provided their speed ratingmatchesthe speed of the grinder.This tool should not be fitted with cuttingoff wheels, sawblades,drill bits, etc.If thereis anydoubt aboutthe correct use of this product contactyoursupplier for advice.Alsomakesure that theshank size of the attachment to bedrivenmatches withthe collet sizefittedinthe grinder andthatthe maximum allowedrunningspeed ofthe attachmentexceedsthatmarked onthe grinder.There arespecial rules governing the use of bonded abrasivemounted point grinding wheels - for details see section"Operating".
Putting Into Service
AirSupply
Use a clean lubricated air supply that will give a measuredair pressure at thetool of 90p.s.i./6.3barwhen the tool isrunning withthelever/triggerfullydepressed.Userecommendedhosesizeand length.It isrecommendedthatthe toolis connectedto the air supplyasshowninfigure1.Do notconnect thetoolto the air linesystem without incorporating an easyto reach and operateair shut off valve.Theairsupplyshould be lubricated.It is strongly recommendedthat anair filter, regulator, lubricator (FRL) is used as shown in Figure 1 asthis will supply clean,lubricatedairat the correctpressuretothe tool.Details of suchequipmentcan be obtained from yoursupplier. If suchequipment is not used then the tool shouldbe lubricated byshuttingoff the airsupply to the tool, depressurising theline by pressing the lever/triggeronthe tool. Disconnecttheair line and
HoseLength
Metres/ Sec²
Work Stations
Thetool should onlybeusedasa handheldhandoperatedtool. It isalwaysrecommended that the toolisusedwhen standingon the solid floor. It can be used in otherpositions but before anysuch use, the operator must be in a secure position havinga firm grip andfooting and be aware of the extra safety precautionsthatmust be observed when usingGrinding Machines.
Page No 1
Page 2
pour intothe intake bushing a 1/5teaspoonful (1ml) of asuitablepneumatic motor lubricating oil preferablyincorporating a rust inhibitor. Reconnecttoolto air supplyandrun tool slowlyfor a few secondstoallowair to circulate the oil. If tool is used frequently lubricate on daily basis and if tool starts to slowor losepower. It isrecommended thatthe air pressure at the tool whilst the toolisrunningis 90p.s.i./6.3bar.The tool canrun at lowerand higher pressures with the maximum permitted working air pressure of 100 p.s.i./7bar.
Operating
Select a suitablemounted point that has a free runningspeedhigher thanthe maximum runningspeed marked on the tool. Make sure that the diameter of the shank exactly matches the diameter of thecollet mounted in the grinder. There are three standardsizes ofcollet available forusewiththisgrinder, i.e.(1) - 1/8"(0.125ins)(3.175mm)(2) - 1mm(0.039ins)(3) - 3mm(0.118ins)Never try to force a 1/8" diameter shank intoa 3mm collet.Nevertry to close a 1/8" diametercollet to secure a3mmshank.Alwaysmatchcorrectlytheshanksizetothecollet size. If uncertain, haveparts measuredbya competentperson.Push the shank as faras possible into the colletandtighten the collet nut usingthe spanners provided onthe collet nut and outputspindle.The shankof the mountedpoint may be pulledforward from the maximum insertion length but alwaysensure a minimum grippinglength of not lessthan 10mm- See Figure 2.Be aware that the allowed runningspeed of the mounted point islowered becauseof an increasein thelengthof the shankbetween the end of thecolletandthe body of the mounted point. This distance is shown in Diagram 2 as"LO"and iscalled the overhang. The information withrespect to mountedpoint size, permissiblerunning speedandreductioninrunningspeed dueto anincreaseinoverhangisavailablefrom the supplier of the mountedpoint.If the increase in overhang for access reasons takes thepermissible running speed of the mountedpoint belowthefreerunningspeedof the grinder selecta smallerdiametermountedpoint.Thefitting of the mounted point should be done by a trained operator.Whenfirst starting the grinder witha new wheel fitted,thegrinder should not be near other persons and be held in aprotected area, i.e. under a bench and run for a few seconds. This will protect personnel from possibleeffectsof damageto the mounted point beforeit was fitted to thegrinder i.e.wheelbreakage.Always useeyeprotection and wear protectivegloves if therearesharp edgesin the work area. The tool and the grinding process can create a noise level such that the use of earprotectorsis advised.If the grinding process creates a dust then use a suitablebreathingmask.Check thatthe material being worked will not cause harmfuldust or fumes.If this is so then specialbreathing masks may berequired.If the grinder vibrateswhenfirst fittinga mountedpointor during operation, remove from service immediately and correct fault
Figure2.Gripping length ofcolletand chuck
before continuingto use.Donotapply excessivepressureasthis will reduce the cuttingefficiency and can bendthe shankofthemounted pointcausingvibration and the possibility ofbreakage. Apply light loads toallow the wheel to cut.Handlethe grinder withcare.If the grinderisdropped,carefully check the mounted point fordamage, i.e.cracks,chipping andstart for the first time asfor fitting a newwheel i.e. undera bench.Never exceed the maximum air pressure. Ifthere is this possibilityalwaysusethisgrinder witha pressurereducingvalvefitted in the supply line. Your supplier will advise of suitable equipment.
Dismantling & AssemblyInstructions
Disconnecttoolfromair supply.First, using one of the spanner wrenches supplied,unscrew and remove the extended air supplyhosealong with the hoseprotector. Then,usingtheappropriatesized hex wrench,loosenthe hex screw (22) onecompleteturnand slideoff therearend holder(23). Slide off thesliding knob assembly, complete withO-Rings (20),(21), air regulator and sliding knob (19). O-Rings (20), (21)maythenbe removed frominsideair regulator and by pushing downonair regulator, it may beremoved from sliding
D=diameterof mounted pointT=length of mounted pointLo=overhangS=diameter ofshankLg=gripping length
(16) may thenbe removed fromhose plug(17).
Using spanner wrenches,unscrew clampingnut (1) and pull out collet (2). Unscrew collet
foundation (4) from body (15). Thecompletemotorassembly can now be removed from body(15). To disassemble motor assembly, enter from intake plate (14) and pull out pin(11). Removeball bearing (13)and bearing plate(12) from rotor (9). Then, rotor blades (10)and cylinder (8) can beseparated easily. Unscrew rotor (9) from chuck spindle(3) and removeball bearing (5), spacer(6) andlateraldisc(7). Slide off the comfortgrip(27) from body (15) by hands.
Reassembly
Clean all parts and examine for wear, replacing any worn or damaged parts. Use only replacement parts obtained from themanufacturer oran authorized distributor. Lightly coat all parts witha suitablepneumatictool lubricatingoil and assembletoolinreverse order.
Safety RulesWhen UsingA Die Grinder
1) Readall the instructions before using this tool. All operators mustbefullytrainedinitsuseand aware of these safetyrules.
2) Alwaysselect suitable abrasive to usewith this tool - seeOperatingInstructions.
3) Alwaysshut off theairsupply to thegrinderanddepressthelever toexhaustairfrom the feedhose beforefitting, adjusting or removing the mounted point.
4) Alwaysadopt a firm footing and/or positionbeforeusing thegrinder.
5) Useonlycorrect spare parts.
6) Check hose and fittings regularly for wear. Do not carry thetoolby itshose.
7) Do notremoveand nevertie downthe safetylever.
8) Never exceedthemaximum air pressureandcheck the free