CHESTER Craftsman Manuel utilisateur
Contents
1. Introduction 2
2. Health&Safety 35
3. MachineSpecification 6
4. InstallationPlans 7
5. GeneralDimension 8
6. MetalCuttingProcess
a.Introduction
b.CentreLathe
c.CuttingTools
d.BasicTheory
e.ToolAngles
f. ToolMaterial
g.MaterialCommonUse
h.ToolLife
i. ChipForm./Breaker
j. CuttingSpeed/Feed
k.CuttingFluid/Lubric.
l. ScrewCutting
9
10
11
12
1314
15
16
17
1819
20
21
22
7. Conclusion 23
8. Parts
a.BedAssembly
b.HeadstockAssembly
c.GearboxAssembly
d.ApronAssembly
e.SaddleAssembly
f. ToolPostAssembly
g.TailstockAssembly
h.ControlRodAssembly
i. H’stockCoverAss’bly
j. ElectricSys.Assembly
k.FollowRestAssembly
l. SteadyRestAssembly
2425
2629
3032
3335
3637
3839
4041
4243
4445
4647
4849
5051
ChesterUKCraftsmanLathe
1
Introduction
ChesterUKLimitedisaspecialistcompanythathasbeensupplyingthemachinetoolindustryforover15
years. The Chester UK Head Office comprises of a 30,500 sq.ft factory complete with offices and a
showroom. Specialising in conventional machine tools, Chester has built a reputation for quality and
reliability,whichishighlyregardedinthemachinetoolindustryandthemodelengineeringmarket.
Thereareseveraldivisions withinthe company;Export,Education, ModelEngineering&UKSales,all
withdedicatedsalespersonnelwhoaretrainedtoansweryourquestions.
When buying from Chester you can be assured of a complete backup service with mechanical and
electricalengineersthatareavailabletogiveadviceifrequired.
StockisalargepartofanybusinessandChesterhavealwaysinvestedsubstantiallyinbuildingalarge
quantity of machines and spares, ready to satisfy customer requirements. Chester UK has one of the
largest stocks ofconventional new machines and accessories within Great Britain. Pleasetake time to
visitourwebsite: www.chesteruk.net
ChesterUKCraftsmanLathe
2
Health&Safety
Aswithallmachinerytherearecertainhazardsinvolvedwiththeoperationanduseofthelathe.Using
themachinewithrespectandcautionwillconsiderablylessenthepossibilityofpersoninjury.However,if
normalsafetyprecautionsareoverlookedorignored,personalinjurytotheoperatormayresult.
Thismachinewasdesignedforcertainapplicationsonly.Westronglyrecommendthatthemachineisnot
modified,and/orusedforanyapplicationotherthanwhichitwasdesigned.Ifyouhaveanyquestions
relativetoitsapplicationdonotusethemachine,untilyouhavefirstbeenincontactwithChester
UK.
The lathe may not arrive with a power socket or plug. In the event of this happening, please inform
ChesterUKonTel:(01244)531631.
Safetyrulesforalltools
User
1. Wearcorrectapparel
Noloose clothing,gloves,rings,braceletsorotherjewellerytogetcaughtinmovingparts.Non
slipfootwearisrecommended.Wearprotectivehaircoveringtocontainlonghair.
2. Alwaysweareyeprotection
Refer to ANSLZ87.1 standard for appropriate recommendations. Also use face and / or a dust
maskifthecuttingoperationisdusty.
3. Don’toverreach
Keepaproperfootingandbalanceatalltimes.
4. Neverstandonatool
Seriousinjurycouldoccurifthetoolistippedorifthecuttingtoolisaccidentallycontacted.
5. Neverleavethetoolrunningunattended
Turnpoweroff.Leavetooluntilitcomestoacompletestop.
6. Drugs,alcoholandmedication
Donotoperatethetoolwhileundertheinfluenceofdrugs,alcoholoranymedication.
7. Makesurethetoolisdisconnectedfromthepowersupply
Whilemotorisbeingmounted,connectedorreconnected.
8. Always
Keephandsandfingersawayfromanymovingparts.
9. Stop
Themachinebeforemovingchips.
10.Shutoff
Powerandcleanthelatheandworkareabeforeleavingthemachine.
Useofthemachine
1. Removeadjustingkeysandwrenches
Form a habit of checking to see that keys and adjusting wrenches are removed from the tool
beforeturningit‘on’.
2. Don’tforcethetool
Itwilldothejobbetterandbesaferattherateforwhichitwasdesigned.
3. Usetherighttool
Don’tforcethetoolorattachmenttodoajobforwhichitwasnotdesigned.
4. Securework
Useclampsoravicetoholdworkwhenpractical.It’ssaferthanusingyourhands,andfreesboth
tooperatethemachine.
ChesterUKCraftsmanLathe
3
5. Maintaintoolsintopcondition
Keeptoolssharpandcleanforthebestandsafestperformance.Followinstructionsforlubricating
andchangingaccessories.
6. Userecommendedaccessories
ConsultChesterUKforrecommendedaccessories.Theuseofimproperaccessoriesmaycause
hazards.
7. Avoidaccidentalstarting
Makesuretheswitchisinthe‘OFF’positionbeforeplugginginpowercord.
8. Stop
Themachinebeforeputtingmaterialinthevice.
9. Always
Havestockfirmlyclampedinthevicebeforestartingthecut.
10. Groundalltools
If the tool is equipped with a threeprong plug, it should be plugged into a threehole electrical
receptacle.Ifanadapterisusedtoaccommodateatwoprongreceptacle,theadapterplugmust
beattachedtoaknownground.Neverremovethethirdprong.
Adjustment
Make all adjustments with the power off.When assembling follow the manuals instructions, this
willensurecorrectinstructionandasafestructure.
Workingenvironment
1. Keeptheworkareaclean
Clutteredareasandbenchesinviteaccidents.
2. Don’tuseinadangerousenvironment
Don’tusepowertoolsindamporwetlocations,orexposetorain.Keeptheworkareawelllit.
3. Keepchildrenetcatasafedistance.
Allchildrenetcshouldbekeptatasafedistancefrom theworkarea.
4. Don’t
Install&usethismachineinanexplosivedangerousenvironment.
Maintenance
1. Disconnect
Machinefromthepowersourcewhenmakingrepairs.
2. Checkdamagedparts
Beforefurtheruseofthetool,aguardorotherpartthatisdamagedshouldbecarefullycheckedto
ensure that it would operate properly and perform its intended function check for alignment of
movingparts,bindingofmovingparts,breakageofparts,mountingandanyotherconditionsthat
may affect its operation. A guard or other part that is damaged should be properly repaired or
replaced.
3. Disconnecttools
Beforeservicingandwhenchangingaccessoriessuchasbladesbits,cutters,etc.
4. Toprevent
Thecorrosionofmachinedsurfaceswhenasolubleisusedascoolant,payparticularattentionto
wipingdrythesurfaceswherefluidaccumulatesanddoesnotevaporatequickly,suchasbetween
themachinebedandvice.
ChesterUKCraftsmanLathe
4
SafetyDevice
1. Interlockswitchonpulleycover.Assoonasthepulleycoverisopen,themachinewillcometo
a stop with the function of this switch. Do not remove this switch from the machine for any
reason,andcheckit’sfunctionfrequently.
2. Interlockswitchoncuttingarea.Assoonasthepulleycoverisopen,themachinewillcometo
a stop with the function of this switch. Do not remove this switch from the machine for any
reason,andcheckit’sfunctionfrequently.
ChesterUKCraftsmanLathe
5
MachineSpecification
SwingOverBed 300mm 12"
SwingOverCrossSlide 200mm 8"
SwinginGap 450mm 18"
DistanceBetweenCentres 570mm 23"
HoleThroughSpindle 36mm
SpindleMount 2¼"x8TPI
SpindleTaper(WithSleeve) MT5(MT3)
NumberofSpindleSpeeds(withBackgear) 12
RangeofSpindleSpeeds 501200
LowGear
50/75/100/120/165/220
HighGear300/410/550/655/900/1200
FeedRange 0.120.42mm/rev
NumberofInchThreads: 40
RangeofInchThreads 4112TPI
NumberofMetricThreads: 27
RangeofMetricThreads 0.257.5mm
MaxToolSize: 16mm 5/8"
CompoundSlideTravel 100mm 4"
CrossSlideTravel: 150mm 6"
CarriageTravel: 440mm 17"
TailstockSpindleTravel: 100mm 4"
TaperinTailstockSpindle: MT3
WidthofBed: 190mm 8"
OverallDimensionswithStand(LxWxH): 1370x740x1233mm
MainMotor: 1½HP,240Vor415V
NetWeight: 390Kg
ChesterUKCraftsmanLathe
6
InstallationPlans
Machinetostand
Machinetofloor
1.CraftsmanLathe
2.Tray
3.Stand
4.Adjustableironspacer
5.Foundationbolt
ChesterUKCraftsmanLathe
7
GeneralDimension
Frontview
Topview
A717mm
B 1310mm
C 610mm
D 1400mm
E 1310mm
ChesterUKCraftsmanLathe
8
MetalCuttingProcess–Turning
Introduction
This training guide is designed to give you 'handson' experience through which you can gain a good
appreciationofthiswellknowntypeofmachinetool.Inparticularyourattentionwillbedirectedtowards
itsoperationalusesandparameters,thegenerallayoutofcontrols,accessories,associatedtooling,and
themaintenancefactorsrelatedtolathes.
Inorderthatyoucanmakethemostuseofthelimitedtimeavailableonlathesitisessentialthatyouuse
everychancetoconsolidatewhatyouobserve.Thistypeofworkislargelyselfmotivatedandthedrive
anddesiretofindoutmustcomefromyou.
Ittakesaconsiderabletimetobecomeaskilledlatheoperatorandtopossessalltheskillofhandthat
goeswithit.Thereforeitisnotexpectedthatyouwillbemanuallyskilledoncompletionofthemodulebut
youwillhavegainedintellectuallyandwithoutdoubt,bypracticalinvolvement,someskillofhandwillbe
achieved.
Figure1.ExampleofaTypicalCentreLathe
ChesterUKCraftsmanLathe
9
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