CHESTER U.K. B-Super 3-in-1 User manual

ModelBSuper3in1
InstructionManual
ChesterUKLtd
ClwydClose,HawardenIndustrialPk
Hawarden,NrChester
Flintshire.CH53PZ
Tel:01244531631
Email:[e-mail]
www.chesteruk.net

IMPORTANT
SAFETYFIRST
ALLMACHINESAREDANGEROUS
1.Usethecorrecttoolforthejobathandnevermakeamachinedoajobitwasnotdesignedfor.
2.Neverforcethe toolinthemachineitwilldothequickerandsaferatthecorrectrate.
3.Alwaysuseclampsorvicestosecurework– yourhandisnotstrongenough!
4.Whenchangingtoolsorworkpiecesalwaysdisconnectthemachinefirst.
5.Servicethemachineregularly;acorrectlyoperatingmachineisasafermachine.
6.Alwaysreplacebeltcoversbeforestartingthemachine.
7.Understandthemachinefullybeforeoperationandalwaysreadthemanual.
8.Gettoknowthemachineslimitationsandapplications.
9.Ensurethatthemachineissecurelyboltedtothebenchandthatthebenchissecurelyboltedtothe
ground.
TAKEGREATCAREWHENOPERATINGTHISMACHINETOPROTECTYOURBODY
1.Alwayswearsafetyglasses–everydayglassesarenotsuitable.
2.Dustcanbecausedwhenmachiningcertainmaterials,alwayswearamask.
3.Makesureyouarenotwearinganylooseclothingsuchasties,rings,braceletsthatmaygetcaughtin
themovingpartsofthemachine.
4.Keepaproperfootingandbalancewhilstoperatingthemachine.
5.Neverleavecleaningrags,etconornearthemachine.
ChesterUKModelB
1.

SAFETYFIRST
ELECTRICS
1.Allelectricaltoolsmustbeearthed.
2.Neveruseelectricaltoolsindamporwetenvironment.
3.Makesurethemachineisintheoffpositionbeforeswitchingonatthemains.
4.Alwaysimmobilisethemachinebeforeservicingorsettingupworkinthemachine.
5.Greatcareshouldbetakenwhenusingcoolantfluidwithmachinetools.
6.Ensurethemachineiscorrectlyconnectedandafuseoftheproperratingisused.
CHILDREN
1.Keepchildrenawayfrommachines,ifnecessaryfitsafetylockstothemachineandmainsswitches.
2.Neverusemachinerywhilsttalkingtovisitors,alwaysconcentrateonthejobinhand!
REMEMBERALLMACHINESARE
DANGEROUSIFNOTUSED
CORRECTLY!
ChesterUKModelB
2.

LIFTINGMACHINE
TheModelBrequirestheuseofliftingequipmentsuchasaforklift,enginehoistorboomcrane.Donot
liftmachinebyhand.Seethewarningbelow.Usedinconjunctionwithliftingstrapsandfollowingsafe
liftingproceduresasdetailedbythemanufacturesofthese liftingdevices,thelathe/ millcanbesafely
liftedoffofthepalletandplacedonasturdyworkbench.
Donotliftthemachinefromanyotherpointsthanthosepicturedin Figure2.
ChesterUKModelB
3

IDENTIFICATION
Figure4.ThefollowingisalistofcontrolsandcomponentsontheModelB.Pleasetaketimetobecome
familiarwitheach item and its location.These terms will beused throughoutthemanual andknowing
them will aid in comprehension. Most of these terms will be shown in italics (italics) throughout the
manual.
MACHINETERMS
1.Halfnutslever 10.Microfeedhandle
2.Powerswitch 11.Drillingmillingclamplever
3.Screwclutchlever 12.Toolpostlocklever
4.Speedchangelever 13.Machinevicehandle
5.Clutchhandle 14.Tailstockbarrelclamplever
6.Thedrillingmillingunit 15.Transversemotionhandle
updownhandle 16.Tailstockbarrelhandwheel
7.Theunitlocklever 17.Tailstocklocklever
8.Drillingoperatinglever 18.Longitudinalmotionhandle
9.Clutchhandle 19.Carriagelocklever
ChesterUKModelB
4

ASSEMBLY&SETUP
Thissectionwillcoverthebasicsinassemblyandsetup.Werecommendyoucompleteassemblyinthe
orderinwhichitispresentedtoachievethebestresults.
HANDWHEEL
Thehandwheelfortheapronmustbeinstalled.
Figure5.Securethehandlewithascrewdriver.
1.RemovetheacornnutandwasherfromthecrossfeedLeadScrew.
2. Slide the handwheel onto the cross feed Lead Screw. Note the key way that is in the bore of the
handwheelandorientitsoitalignswiththekeyonthecrossfeedLeadScrew.
3.Securethehandwheelwiththeacornnutandwasher.
4.SecurethehandleforthehandwheelwithascrewdriverasinFigure5.
HANDCRANK
Thehandcrankforthelongitudinalmanualfeedmustbeinstalled.
1. Theendofthe LeadScrew has asmall holethat iscrossdrilled near itsend.The handcrank has a
similarholedrilled intotheedgeofthecentreball.Orienttheseholestoeachotherandslidethehand
crankontotheendoftheshaft.
2.Rotatethehandcrankontheshaftuntiltheholesalign.
3.Placethe4mmrollpinintotheholeasin Figure6anddriveitinwithahammer.
ChesterUKModelB
5

Figure6.PlacerollpininholeandtapwithhammerFigure7.Rotatechuckkeytoopen/closejaws
LATHECHUCK
TheModelBLathe/Millcomesequippedwitha3jaw(alreadyinstalled).
The3jawchuckisascrolltypechuck,meaningthatallthreejawsmoveinunisonwhenadjustmentsare
made. Most 4jaw chucks, on the other hand, feature jaws which are adjusted independently. A 4jaw
chuckcanbeusedtoholdsquareorrectangularstock.
The3 jaws,ona3JawChuck,openandcloseusingthechuckkeyprovided.Pleasereferto Figure7.
Rotatingthekeyclockwiseclosesthejaws.
Tousethismountingplate:
1.Fastentheplatetothe4jawchuckusingthescrewsprovidedwiththechuck.
2.Fastentheplattothespindleusingthe3screwsthatwereremovedfromthe3jawchuck.
DONOTmountchucksmeasuringlargerthan5”indiameteronthisspindle.
Some4jawchucksmaynotreadilymounttothebackplateprovided.Itmaybenecessarytodrillnew
mounting holes and/or resurface and shoulder the plate so the chuck may be mounted accurately and
safely. Should you have questions regarding this, please consult your local technical school, trained
expertorothertraderesources.
ChesterUKModelB
6

LATHECHUCKREMOVAL
Toremoveachuck:
1.Placeapieceofplywoodacrossthelathebedandpositionitjustunderthechuck.Theboardshouldbe
atleast8”wideand10”long.
2.Locatethe3socketheadcapscrewsonthebackofthebackplateandremove2ofthem.Pleasesee
Figure8.
3.Removethelastscrew,whilstmakingsuretosupportthechuckwithonehand.Thechuckmaycome
offasthelastscrewisremoved,soitisimportantthatyouarereadytosupportitsweight.
4.Removethechuck.
ChesterUKModelB
7

Ifthechuckisstilltightonthespindle:
Taptheedgeofthechuckwitharubberorwoodenmalletwhilesupportingthebottomofthechuckwith
yourfreehand.Ifthechuckdoesnotimmediatelycomeoff,rotatethespindleapproximately60ºandtap
again.
Toinstallachuck:
1.Placeapieceofplywoodacrossthelathebedandpositionitjustunderthespindle.
2.Placeasocketheadscrewintooneoftheholesinthebackplate.Liftthechuckuptothespindleand
alignthethreadedholeinthebackofthechuckwiththescrew.
3.Whilesupportingtheweightofthechuck,turnthescrew3turns.Donottightenatthistime.
4.Rotate thespindleandrepeatstep3 onthelasttwoscrews.
5.Returntothefirstscrewandtightenitalittlemore.Tightentheotherscrewsaswellbutonlyenough
thatthegapbetweenthechuckandthebackplateremainseven.
6.Finally,tightenallthreescrewsuntilthegapbetweenthechuckandthebackplateisclosed.
ChesterUKModelB
8

DEADCENTRE
The dead centre is used to support stock that is too long to be supported by the chuck alone. Stock
protrudingmorethan2½timesitsdiameter,shouldbesupportedbyadeadorrollingcentre.
Figure9.Deadcentreinstalledintailstock.
Thetailstockbarrelandcentrehavea MorseTaper#3.Beforeassemblingthese, insurethatthemating
surfaces are“white glove” clean. Cleanthe matingsothey are freeofdirt and oil. Theseparts will last
longerandremainaccuratewhenproperlycleanedbeforeassembly.Morsetaperswillnotinterlockwhen
dirtoroilarepresentonthemountingsurfaces.
Insert the end of the centre into the tailstock bore until it seats. The force of the centre contacting a
mountedworkpiecewillfullyseatthetaperwhenthehandwheelistightened.
When using a centre, the tailstock barrel should protrude about ½” and not more than 1¼” out of the
tailstockbody.SeeFigure9.
Toremovethelivecentre,backthetailstockbarrelallthewayintothecastingbyturningthehandwheel,
on the end of the tailstock, counterclockwise. The live centre will pop out. Besure to hold it before it
comesoutlestitdroponthelathebed.
ChesterUKModelB
9

TOOLPOST
TheModelB comes supplied with a4 wayturret tool post. It isdesignedto accept upto 14tool bits.
OtherdevicesandholdersmaybeinstalledintothetoolpostandarrangedasinFigure10.Whenmore
thanonetoolissecuredintothetoolpost,changingfromonetooltoanotherisquicklydonebyloosening
thelock lever(5)androtatingtheposttothedesiredtool. Aspringloadedcatchisinstalledbelowthe
toolpost.Thisallows motioninonlythecounterclockwisedirection.Thecatchcausesthetoolpostto
stop at the same rotational point for each tool placement. This feature can be used for some types of
machiningsetups.Pleasenotethatthesecurenessofthetoolpostisnotdependentuponthecatch.Thus,
thetoolpostcanbepositionedatanyrotationallocationandproperlysecuredwiththelocklever.
If using tool bits that require shimming, be sure to use steel shims as opposed to aluminium or brass
shims.Softshimsmaygive,allowingthetoolbittobecomeloose!
Figure10.Fourtoolsmountedintothetoolpost:
1.BoringBar 2.LeftCuttingToolBit
3.ThreadingToolBit 4.RightTurningToolBit
5.LockLever
Whensecuringatoolbitintothetoolpost,alwaysremembertheserules:
· Securethetoolbitwithatleast2boltsonthetoolpost
· Make sure the top of the tool bit is at the lathe spindle centre line or just below. The tailstock
centrecanbeusedasin Figure11.
· Neverextendthetoolbitmorethan2½timesitsthicknessfromedgeofthetoolrest,i.e.a3/8”
toolbitshouldonlyextend15/16”pastthebottomofthetoolrest.Lessisbest!
· Alwaysusesharptoolbits.
Figure11.Usingacentretochecktoolbitheight.
ChesterUKModelB
10

DRILLCHUCK
TheModelBcomessuppliedwithadrillchuckandarborthatcanbeusedinthetailstockonthelatheor
inthespindleforthepress.Thearboranddrillchuckareassembledandinstalledintothespindleforthe
drillpressspindleatthefactory.
DRILLCHUCKREMOVAL
Toremovethedrillchuckfromthedrillpress:
1.Unplugthemachine.
2.Returnthespindletothehighestposition.
3.Removethesmallplasticcapontopofthebeltguard.
4.Graspthedrillchuckwithonehandandunscrewthedrawbar3 turnswiththeother.
5.Securethequillwiththequilllock.
6.TapontheendofthedrawbarwithasoftfacedmalletasinFigure12.Donotuseasteelhammer!
Damagetothedrawbar,suchaschipping,mayoccur.
7.Oncethearborhasbecomeloose,holdthedrillchuckwithonehandwhileunthreadingtheremainder
ofthedrawbolt.
Figure12.Removingdrillchuck
ChesterUKModelB
11

DRILLPRESSMOUNTING
Tomountthedrillchuckintothedrillpress:
1.Removethesmallplasticcapontopof thebeltguardandslidethedrawbaroutofthespindlethrough
thetop.
2.Insertthearborhalfwayintothedrillpressspindle,thenquicklyslideitinplace.
3.Replacethedrawbarandthreaditintothearbor.Donotovertighten!Thedrawbaronlyneedstobe
lightlytightened.Tighteninganyfurtherwillmakeitdifficulttoremovethearbor!
LATHEMOUNTING
Priortomountingthedrillchuckintothetailstockwipetheinsideofthetailstockbarrelandarbordown
withacleanclothandinspectthemfornicksorscratches.Anyirregularitiesonthesurfaceofthearboror
inside thetailstock barrel will hinder thelocking capabilityofthetaper andshould bedressed smooth
withafinefile.
Tomountthedrillchuckintothetailstockofthelathe,slidethearborintothetailstockbarrelaboutone
halfoftheway.Withaquickmotion,finishslidingthechucktherestoftheway.Thisshouldseatitwell
intothetailstockbarrel.
Becausethedrill chuckarbor isthreadedon thesmall end, removalrequiresthe use of amallet and a
woodendowelasinFigures13.Tapalongthebackedgeofthedrillchuckontheleftandthentheright.
Thedrillchuckandarborwillpoploosefromthetailstockbarrel.
Drillchuckarbors withastandardtang(or flat)onthesmall endallow theoperatortosimplyturnthe
tailstock handwheel counterclockwise until the drill chuck and arbor pop loose. Chester UK offers a
varietyofchucksandarbors.Pleaseseeourcurrentcatalogueformoreinformation.
Figure13.Seatingthearboranddrillchuck.
ChesterUKModelB
12

MACHINEVICE
TheModelBcomessuppliedwithamillingvicethatalsoservesasthecompoundforthelathe.The4
waytoolpostmustberemovedbeforeusingthevice.Loosenthelockhandleandslidethetoolpostoffof
thecompound/viceasFigure14.
Themillingvicecanbealignedto1ofthe2axisofthelatheoratanyangledesired.Caremustbegiven
tosettingthevice ifaprecisionangleisneeded.Thefollowinginstructionsaregiventomakethejaws
paralleltothetravelofthecrossslide.
1.Removethetoolpostasdescribedabove.
2.Loosentheswivelboltsonthecompound/vicesoitcanswivelfreely.Pivotthecompound/viceso
thejawsoftheviceareroughlyalignedwiththecrossslide.
3.Mountthedrillchuckintothemillingspindleandsecureanindicatorintoitor,placeadialindicator
mountedtoamagneticbaseonthebedasin Figure15.
4.Positionthecrossslideandapronsotheindicatorpointcontactsthestationaryvicejaworaparallel
mountedintothevice.
5.Movethecrossslidewiththehandwheelandwatchthedial.Notethedirectiontheneedleismoving
onthedialandbyhowmuch.
6.Whenthevicehasmovedsotheindicatorisattheotherendoftheparallel,pivottheviceonehalfthe
amountofmotiondetectedin step6.
7. Move the vice to the starting position and note the difference. Again, pivot the vice one half the
difference.
8.Repeatsteps6 through 8untilthedialremainsstationarywhentheviceismoved.
9.Tightenthepivotboltsonthebaseofthecompound/vice.
Figure14.Slidingthetoolpostoff. Figure15.Aligningviceforprecision.
ChesterUKModelB
13

LATHECONTROLS
LATHESPEEDS
Beforeusingthelathe,thehubontheendofthelathespindlemustbepulledoutasshowninFigure16.
Toeaseengagementofthishub,slowlyrotatethespindlebyhandwhilegentlypullingthehub.
Figure16.Speedchart
Thespeedof the lathe is controlled by the position of thebelts onthepulleys.Thechart inFigure16
showsthevariouscombinationsofbeltpositionsforachievingarangeof6speeds.
Example:
Toselectaspindlespeedof310R.P.M.,placeabeltonthe3
rd sheave(fromtheoutermostsheave)ofthe
middlepulleyandthe2
nd sheaveofthespindle pulley. Place abelt fromthe first sheaveonthemotor
pulleytothefirstsheaveofthemiddlepulley.
Tochangebeltposition:
1.Unplugthemachine.
2.Loosenthetensioningnutlocatedjustabovethemotor.SeeFigure17.
3.Loosenthenutonshaftforthemiddlepulley.SeeFigure18.
4.LiftthemotorandremovethelowerbeltfromtheModelBmotorpulley.
5.Placetheupperbeltinthedesiredposition.
6.Placethetensionbeltinthedesiredpulleys.
7.Pulltensionontheupperbeltwiththemiddlepulleyandtightenthenutloosenedin step3.
8.Tightenthetensioningnutjustabovethemotoruntilthereis¼”deflectionwithmoderatepressure.Do
notovertighten.
Figure17.Tensionnutshown Figure18.Loosenthisnuttoadjustpulley.
ChesterUKModelB
14

FEEDSELECTION
Nevermovethefeedrateleverwhilethemachineisrunning.
TheModelBLathe/Millhas2feedcontrolleverswhichmustbeengagedinordertousethepowerfeed
orthreading feature.TheFeedRateLever,showninFigure19,controlsinternalgearsthatchangethe
feedratebyafactorof2.Turningthelevertoposition“l”willcausetheLeadScrewtoturnattwicethe
rateas whenit isinposition“ll”. Whenthis lever is straight up,thegearing is in neutraland no power
feedisavailable.
Figure19.Feedrateselectionlever
Important
Do not force any lever on the machine. If the lever will not engage, rotate the chuck by hand while
keepinglightpressureontheselector.Asthechuckrotatesitalignsthegearteethinsidetheselectorbox
andtheselectorwillengage.
Figure20.FeedLeverindicatedbyarrow
FEEDLEVER
While the Lead Screw can be placed in neutral with the feed selection lever, another lever allows the
powerfeedingfeatureofthelathetobeturnedonandoff.Whenturnedtotheleft,asinFigure20,the
FeedLeverconnectspowertotheapron.Whenturnedtotheright,theaproncanebefedmanuallyand
thehandcranknolongerturnsbyitself.TheaproncannotbemovedmanuallyunlesstheFeedRateLever
isinneutralortheFeedLeveristurnedtotheright.Pleaseseethecautionbelow.
ChesterUKModelB
15

HALFNUT
ThehalfnutleverislocatedunderthelefthandsideapronasshowninFigure21.Thishandlemaybe
engagedanddisengagedwhilethemachineisstillrunningandwhilemakingacut.Movethelevertothe
downpositionandthehalfnutisengaged.BecausethethreadsofthenutandLeadScrewwillnotalways
bealigned,engagingthehalfnutmayrequirewaitinguntiltheyare.Donotforcethehandle.Applylight
pressuretothehandleandwhenthethreadsarealignedthehandlewillengage.
Figure21.Thehalfnutleverandcarriage
CARRIAGELOCK
The carriage lock lever is located under the right hand side of the apron as shown in Figure 21. This
allowsthecarriagetobelockedinplaceforprecisionfacingoperationswhileusingthelatheortomakea
setinamillingoperationmorerigid,amongotherthings.
CARRRIAGECONTROLS
Thelathehas3handlesformanualcontrolofthetoolbitduringmachiningoperations.Onefullturnon
thecrossslideorlongitudinalhandcrankswillproduce0.100”(onetenthofaninch)ofmotion.Thecross
slide and apron crank have dials with divisions showing relative motion. The compound has a direct
readingscaleonitssidewhichiscalibratedin1millimeterincrements.Thefollowingisadescriptionof
eachslideandtheirmeasuringcharacteristics.
Compound Slide – This slide is adjustable to any angle. By loosening the bolts at the swivel base as
shownin Figure22,thecompoundmaypivottoanyanglerelativetotheturningaxisofthelathespindle.
Thisfeatureallowstaperedcutstobeproducedonaworkpiece,andwhensetto60º,ishelpfulincutting
threads, etc. The scale on the side of the slide has divisions in millimeters and is 80 millimeters long.
Eachlinemarks1millimeter(orabout0.03937”).Thetoolpostismountedtothetopofthecompound
slideandwhenremovedallowstheslidetobeusedasavice.
Figure22.Changingtheangleoncompound.
ChesterUKModelB
16

CrossSlide–Thehandwheelmovesthecompoundslideacrossthelathebed.Turningthedialclockwise
movestheslideawayfromtheoperator.Themotionofthisslideisusedforfacingaworkpieceandwhen
advancing a cut for reducing a diameter. The dial has 100 divisions with each division representing
0.001”(onethousandthsofaninch)ofmotionfortheslide.Thelabelabovethedialreportsthateachline
represents0.002”.Itisbesttothinkofthisastheamountofreductionindiameteronthepartperlineon
thedial.Therefore,rotatingthedial10markswillmovetheslide0.010”andmultiplyingthisamountby
0.002”equals0.020”.Therefore,thediameterofthepartwillbereducedby0.020”
Apron–Thelongitudinalmotionoftheaproniscontrolledbythehandcrankattheendofthelathebed.
SeeFigure23.Themotionofthisslideisusedwhencuttingalongthelengthofaworkpiece.Thisslide
canalsobeoperatedwiththepowerfeedfeature.
Figure23.Handcrankfortheapron,
GraduatedDials–Eachdialcanberotatedwithoutturningthehandcrank.Thisishelpfulbecausethe
dialcanbesettozeroafterthetoolbittouchesthepartandthelocationoftheslideandtoolbitwillbe
known.Thegraduateddialcanbeadjustedbyholdingthehandcrankwithonehandandturningthedial
withtheother.
TAILSTOCKCONTROLS
Thetailstockcomessuppliedwithahandwheelwithgraduateddial,barrellock,tailstocklockandoffset
feature.Figure24showsthelocationsofeach.
Tailstock Handwheel – Turning the handwheel advances or retracts the barrel in the tailstock. The
graduateddialonthehandwheelisadjustable.
BarrelLockLever –Thisleverlocksthetailstockbarrelinplace.
TailstockLockLever –Thisleverlocksthetailstockinplaceonthelathebed.
Offset Mechanism – Loosening these bolts allows the tailstock to be offset from centre by turning a
screw.Thisfeaturewillallowtaperturningwhenaworkpieceisheldbetweencentres.
Figure24.Detailoftailstockcontrols
1.TailstockHandwheel 2.BarrelLockLever
3.TailstockLockLever 4.OffsetMechanism
ChesterUKModelB
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DRILLPRESSCONTROLS
DRILLPRESSSPEEDS
Thespeedofthedrillpressspindleiscontrolledby2groupsofbeltsandpulleys.Thebeltpositionson
theendofthelathecontrolonespeedrange.See Figure25.Thebeltsandpulleysabovethedrillpress
controltheotherrange.SeeFigure26.
Figure25.Lowerpulleysforspeedchanges Figure26.Upperpulleysforspeedchanges
Unplug the Lathe/Mill! Before using the drill press, the hub at the end of the lathe spindle must be
adjusted to the “in” position. See Figure 27. To ease engagement of this hub, slowly rotate the drill
spindlebyhandwhileapplyingpressuretothehub.
Thechartalsoshowsthevariouscombinationsofbeltpositionsforachievingadesiredspeed.
Example:
Toselectaspindlespeedof310R.P.M.,startbymovingthebeltsattheendofthelathe.Movethelower
belttothe“B”position.Movetheupperbelttothe“F”position.Followthebeltchangingproceduresin
thesectiontitledLatheSpeeds.Next,movethebeltlocatedabovethedrillpresstothe“KG”position.
Figure27.Speedchart.
ChesterUKModelB
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Tochangebeltposition:
1.Unplugthemachine.
2.RemovetheUpperBeltGuard,loosenthecoversecuringthestudandpivotthebelttensionertorelax
tensiononthebelt.SeeFigure28.
3.Whileslowlyturningapulley,rollthebeltupordowntothedesiredsheave.Itisalwayseasiertoroll
offofthelargerpulleyontoasmallerpulley.Donotallowfingerstobecometrappedbetweenbeltand
pulley.
4.Pivotthebelttensioneruntilthebeltistightandsecurethetensionerbytighteningthestud.
5.Replacebeltguard.
Figure28.Loosenstudtopivotbelttensioner.
QUILLLOCKLEVER
TheheightofthespindlecanbelockedwiththeQuillLockLever.SetthedesiredheightwiththeQuill
Leverandturntheleverdown.ThelevercanbeclearlyseenonthebottomrighthandcornerofFigure
29.
FINEFEEDDOWNFEED
TheupanddownmotionofthedrillpressspindleiscontrolledjustlikeanyotherdrillpresswithaQuill
Lever.Butunlikemostdrillpresses,theModelBissuppliedwithaFineDownFeedKnob,indicatedby
thearrowin Figure29.
Figure29.Movethehandlewhiledepressingknob.
Toactivatethisfeature,rotatetheQuillLeverwhiledepressingtheblackknobinthemiddleofthecentre
ofthehubas inFigure29. Theknobwill engage and thespindlewill no longer moveusingtheQuill
Lever.RotatingtheFineDownFeedknobinaclockwisedirectionwillcausethespindletogodown.To
disengagethis feature, rotatetheFineDownFeed knobandpull ontheknob in thecentre ofthe hub.
Rotatingthehandwheelwillalwaysaidinengaginganddisengagingthisfeature.
ChesterUKModelB
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