Open Cone Style Precision Bench Lathes
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Open Cone Style Precision Bench Lathes (Preloaded Ball Bearing Spindle Construction) P roven compl etely successful with our various enclosed head machines, the Hardinge preloaded ball bearing s pindle construction is now offered in the open cone style. Comments, verbal and written , verify the performance features to be expected from Hardinge preloaded ball bearing s pindle construction- see inside pages for details. The extreme accuracy and high sp indle speeds obtained with these machine s mean greater production and lower cost. EQUIPMENT OB 37 Cataract Bench Lathe Complete 013 47 Cataract Bench Lathe Complete OB 49 Cataract Bench Lathe Complete Ol3 57 Cataract Bench Lathe Complete OB 59 Cataract Bench Lathe Complete NET WEIGHT _ 32" Bed I 36" Bed 144 lbs. 158 lb s. 146 lbs. 1 160 lbs. 155 lbs. 169 lbs. .. I 148 lbs. 162 lbs. 157 lbs. 171 lbs. Regular Equipment: Headstock wi th Draw Sp indle, Dri\-e Pl ate and 1\fa le Center; T a il st ock wi th :11ale Cen ter; 32" or :3 ()" Bed wi th Too l Pan , Bed Bo lt, Bench B olts, a nd nec ess ary wrenches . Co mpound Slide H est and T -R est extra . - - --- SPECIFICATIONS OB37 OB47 OB49 OB57 - - - - Capacity through Collets and Draw Spindle l;:l in. %in. %in . 1 in. Swing Over Bed . . . . . 7 in. 7 in. 9in. 7 in. Collet Used- Dimensions in Collet Bulletin 3C HARDI NGE 4C HARDINGE 4C HARDINCE 5C HARDINCE Maximum Distance Between Centers with 32" Bed 13 in. 13 in. 13 in. 13 in. Maximum Distance Between Centers with 36" Bed 17 in. 17 in. l7in. 17 in. Recommended High Spindle Speed, R.P.M. 3000 3000 3000 3000 Capacity of Spindle with Three and Four Jaw Chuck 3%4 m. Ys in. Ys in. 1 %2in. Diameter of Steps on Headstock Cone 2%3%4% in. 2%3%4% in. 2%4%6 in. 2%3%4% in. Width of Belt 1%in. 1lf4 in. 1%in. 1%in. Travel of Tailstock Spindle 3l;:l in. 3l;:l in. 3l;:l in. 3l;:l in. - - -- --- OB59 1 in. 9in. 5C HARDINGE 13 in. 17 in. 3000 1 %2in. 2%4%6 in. 1%in. 3l;:l in. HARDINGE BROTHERS!> INC.!> ELMIRA!> N. Y. CHICAGO - NEW YORK - DETROIT - HARTFORD - PHILADELPHIA - CLEVELAND
description
Proven completely successful with our various enclosed head machines, the Hardinge preloaded ball bearing spindle construction is now offered in the open cone style. Comments, verbal and written, verify the performance features to be expected from Hardinge preloaded ball bearing spindle construction-see inside pages for details. The extreme accuracy and high spindle speeds obtained with these machines mean greater production and lower cost.
Transcript of Open Cone Style Precision Bench Lathes
OpenConeStyle PrecisionBenchLathes (PreloadedBallBearingSpindleConstruction) Provencompletel ysuccessfulwithourvariousenclosedheadmachines,theHardingepreloadedball bearingspindleconstructionisnowofferedintheopenconestyle. Comments,verbalandwritten,verifytheperformancefeaturestobeexpectedfromHardingepreloaded ballbearingspindleconstruction- seeinsidepages fordetails. Theextremeaccuracyandhighspindlespeedsobtainedwiththesemachinesmeangreaterproduction andlowercost. EQUIPMENT OB 37CataractBenchLatheComplete 013 47CataractBenchLatheComplete OB 49CataractBenchLatheComplete Ol3 57CataractBenchLatheComplete OB 59CataractBenchLatheComplete NETWEIGHT _ 32"BedI36"Bed 144lbs.158lbs. 146 lbs. 1160lbs. 155lbs.169lbs. .. I148lbs.162lbs. 157lbs.171lbs. RegularEquipment:Headstockwi t hDrawSpindle,Dri\-ePl ateand1\faleCenter; Ta il st ockwi th:11aleCen ter;32"or:3 ()"Bedwi t hToolPan,BedBolt,B ench Bolts,andnecess arywrenches .CompoundSlideHestandT -Restextra . - ----SPECIFICATIONS OB37OB47OB49OB57 - - - -CapacitythroughColletsandDrawSpindlel;:lin. %in.%in.1 in. SwingOverBed.....7in.7in.9in.7in. ColletUsed- DimensionsinColletBulletin3CHARDI NGE 4C HARDINGE4CHARDINCE5CHARDINCE MaximumDi stanceBetweenCenterswith32"Bed13in. 13in.13in.13 in. MaximumDistanceBetweenCenterswith36"Bed17in.17 in.l7in.17 in. RecommendedHighSpindleSpeed,R.P.M.3000300030003000 Capacity of Spindle with Three and Four Jaw Chuck3%4m.Ysin.Ysin.1 %2in. DiameterofStepsonHeadstockCone 2%3%4% in.2%3%4% in.2%4%6 in.2%3%4% in. WidthofBelt1%in.1lf4in.1%in.1%in. TravelofTailstockSpindle 3l;:lin.3l;:lin.3l;:lin.3l;:lin. - - -- ---OB59 1 in. 9in. 5CHARDINGE 13 in. 17 in. 3000 1 %2in. 2%4%6 in. 1%in. 3l;:lin. HARDINGEBROTHERS!>INC.!>ELMIRA!>N.Y. CHICAGO- NEWYORK- DETROIT- HARTFORD- PHILADELPHIA- CLEVELAND HARDINGE NEWYORK H ardingePrecisionPreloadedBallBearingHeadstock CROSSSECTIONOFHARDINGEOPENCONEHEADSTOCKWITHPRELOADEDBALLBEARI:-IGS THEterms"PrecisionBenchLathe"and"SpeedLathe"havealwaysbeenusedwhenreferringtoabench lathe. Therefore,thetwoessentialrequirementsareaccuracyandspeed.Toobtainaccuracywithplainbear-ingsrequiresaclosespindlefitwhichlimitsthespeedbecauseofthefrictiondevelopingexcessiveheatdetri mentaltothebearings. SuperprecisionDuplexBallBearingswithpreloading,asdescribedinthisbulletin,provideextremeaccuracy andhighspindlespeedswiththebearingsrequiringnoadjustment.Thedesirableresultsaresosurprisingthat actualuseisthebestmediumtodeterminetheadvantagesoveryourpresentmachines. HEADSTOCK:Theheadstockframeisofthefinest grade,seasonedandheat-treatedalloyironandhasa handscrapedbearingsurfacetofitthewaysofour amplyproportionedlathebed. TheoutstandingfeatureistheHardingepreloaded ballbearingspindleconstruction.Thedesignhasbeen verysuccess ulwithourenclosedheadmachinesover anumberofyears.Theprovenperformanceassures, First,greateraccuracy;Second;heaviercuts;Third, higherspindlespeeds. Thebearingsrequirenoattentionoradjustmentfor continualcare-freeoperation - thisimportantchar-acteristicovercomesexpensivedelayspreviouslyas-sociatedwithrepairoradjustmentofconventional sleevebearings. Thespindleishardenedandground,bothinternal! y andexternally,andismadeofthebestgradeball bearingsteel.Withtheballbearingconstruction,the spindleismountedinrotatingmemberstoeliminate wearonthespindle - anunusualfeatureforabench lathe.Thespindleconepulleyisprovidedwithfour holesforlockingandsixtyholesforindexing.The spindlehastheHARDINGEpatenttapernose- thread-ednosespindlefurnisheduponapplication. BALLBEARINGS:Workloadonasleevebearing issupportedbyafilmofoil ,thefunctioningofwhich isdependentuponsuchvariablefactorsasfilmthick-ness,temperatureanddifferenceinthegradesofoil used.Withapreloadedballbearing,thepressure betweenballsandracesissuchastoprevent forma tionofanoilfilmandthecontactofloadcarrying membersispositivelymetal tometal.Inotherwords, theloadiscarriedonperfectspheresofhardened steelinsteadofglobulesofoilwhoseload-carrying abilityvarieswiththeoperatingtemperature.Natur-ally,accuracywithspeedandlonglifeisattained. Thepreloadingisdescribedseparatelyandtbere sultantload-carryingcapacityisnotamatterofex-periment,butissubjecttoasaccurateamathematical determinationasisthestrengthofasteelbridge. Thesteelball,becauseofitsshape,presentsauniform andcalculableresistance.Theballsautomaticallyad justthemselvestotheproperangleforeitherpurely endorradialthrust,oracombinationofthetwo. Propersteel ,vastimprovementinmanufacturing methodsandtheuseofopticalgaugeshaveachieved auniformstandardofaccuracy,consideredcommer-ciallyimpossibleafewyearsago. HARDINGPRECISIONBALLBEARINGBENCHLATHESAREOFFEREDINFIVESIZES- REFERTOPAGEOBONE PageOB-Two HARDINGEBROTHERS,Inc.,ELMIRA,NEWYORK PRELOADING:Theterm"preloading"maybebest understoodbyreferringtotheaccompanyingillustra-tions:FigurelshowstheDuplexDoubleRowBear-ing beforeclamping.Theclearancebetweentheinner ringsatpoint"B"iscalculatedbythebearingmanu-facturertoproduceapre-determinedinitialloadfor benchlathepurposes. FIGURE1FIGURE2 Ourinstallationmerelyconsistsofturning thelocking nut"A"showninthecrosssectiononpageOB-Two untiltheinnerraces meet(SeeFigure 2).Thissimple assemblyprocedureautomaticall ysecurestheproper initialloadforcorrectspindlerigidityandrequires nofurtherattention.Thedottedlineindicateshow thepreloadpressuretakesplacethroughthebearing. Withtheangular races,theballshaveanangularcon-t
