>> P.159
MeasuringForceLimitingDeviceRatchetstopFrictionthimble(Ftype)RatchetthimbleAudibleinoperationOne-handedoperationRemarksYesUnsuitableAudibleclickingoperationcausesmicro-shocksNoSuitableSmoothoperationwithoutshockorsoundYesSuitableAudibleoperationprovidesconrmationofconstantmeasuringforceø6.35spindleø8spindle30’30’CarbidetipCarbidetipø6.3ø7.95MeasuringFaceDetailNote:ThedrawingsaboveareforillustrationonlyandarenottoscaleVernierreading0.004mm(2)FiduciallineThirddecimalplaceSeconddecimalplaceFirstdecimalplaceMillimetresTensofmmCounterreading+0.004mmmm0.09mm0.92.mm00.mm2.994mm(2)(1)Note:Indicatesfourdigits.Note:0.004mm(2)isreadatthepositionwhereaverniergraduationlinecorrespondswithoneofthethimblegraduationlines.02-78HowtoReadtheScaleMicrometerwithstandardscale(graduation:0.01mm)(1)0545403530(2)(1)Sleevescalereading(2)ThimblescalereadingMicrometerreading7.mm+0.37mm7.37mmNote:0.37mm(2)isreadatthepositionwherethesleeveduciallineisalignedtothethimblegraduations.Thethimblescalecanbereaddirectlyto0.01mm,asshownabove,butmayalsobeestimatedto0.001mmwhenthelinesarenearlycoincidentbecausethelinethicknessis1/5ofthespacingbetweenthem.Approx.+2μmThimblescaleIndexline302520152)Approx.+1μm1)86042IndexlineThimblescaleMicrometerwithvernierscale(graduation:0.001mm)Thevernierscaleprovidedabovethesleeveindexlineenablesdirectreadingstobemadetowithin0.001mm.1005(1)Sleevescalereading(2)Thimblescalereading(3)ReadingfromthevernierscalemarkingandthimblegraduationlineMicrometerreading6.mm0.21mm+0.003mm6.213mm(2)302520151005(1)86042(3)Note:0.21mm(2)isreadatthepositionwheretheindexlineisbetweentwograduations(21and22inthiscase).0.003mm(3)isreadatthepositionwhereoneoftheverniergraduationsalignswithoneofthethimblegraduations.(3)30254208605(2)2015Micrometerwithmechanical-digitdisplay(digitalstep:0.001mm)Thirddecimalplaceonvernierscale(0.001mmunits)(1)1050456420(1)0299mm
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