>> P.358
BackPlungerTypeDialIndicatorsSERIES2•Theonerevolutiondialindicator(backplungertype)preventsthepossibilityofreadingerrors.•Backplungertypedialindicatorsaresuitableformountingontolevellingmachinetooltablesorinspectionjigs,andforuseinsituationswherestandarddialindicatorsaredifculttoread.•Mitutoyo'suniqueshockproofmechanismprovidesexcellentdurabilityandshockresistance.•Model2990A-10provides0.001mmgraduation.SPECIFICATIONSMetricCodeNo.Graduation(mm)Range(range/rev)(mm)Maximumpermissibleerror(MPE)(µm)ISO/JIStypeANSI/AGDtypeIndicationerror1/10Rev1/2Rev1RevHysteresisRepeat-abilityDialreadingMeasuringforce(N)423150-0-5050-0-501.4orless1.5orlessMeasuringrange1452960A2990A-100.010.0011(1.27)0.1(0.14)82.5————InchCodeNo.Graduation(in)Range(range/rev)(in)Accuracy(in)First1Rev/2.5Rev/10RevRetraceRepeatbility(in)DialreadingMeasuringforce(N)2961A2991A-10Note1:Completedproductsinspectionisperformedintheverticalorientation(contactpointdownward)andthestated±0.0005/—/—±0.0002/—/—0.04(0.05)0.008(0.01)±0.0001±0.000050.000160.00010.00050.000120-0-204-0-41.4orless1.5orlessaccuracyisguaranteed.Note2:Thebezelclampcannotbeused.Holdingbar2960AHoldingbar(optional)CodeNo.øD(mm)L(mm)ø6ø621AAA16613656712462521AAA16721AAA168136568Note:øDandL:detailshownindrawingbelow.ø6.35ø6.35ø8ø8428181424281OptionalAccessory•Limithand(2pcs.)Refertopage07-41fordetails.2990A-10ø57Holdingbar(optional)Unit:mmUnit:inHoldingbar(optional)øDLø2.28øDLø5858.6ø80-0.09ø425.55.33926.816.6M2.5×0.452991A-10ø51ø2.24ø0.3750-0.0012ø0.161.00ø2.01Ballcontact(ø0.12)21BZB005(thread:No.4-48UNF)0.211.521.060.46Holdingbar(optional)(ø0.24Only)øDLø0.3750-0.012ø0.160.86ø1.38Ballcontact(ø0.12)21BZB056(thread:No.4-48UNF)0.200.980.430.93Holdingbar(optional)(ø6only)øDL46ø80-0.009ø452428.712.821.8ø35M2.5×0.45ANSI/AGDType2961Aø2.24DIMENSIONSISO/JISType2960Aø57Note1:Theshoulderonacontactpoint(standardaccessory)for2960Aand2961Aactsasastoptopreventspindleoverrunthatmayotherwisedamagetheindicator.Whenreplacingitwithanoptionalcontactpointwithaconnectornotexceedingø7mminoutsidediameter,insertawasher(withø7mmoutsidediameter,ø3mminsidediameter,andapproximately0.5mmthickness)abovethecontactpoint.Note2:Refertopages07-63to07-68fordetailsofcontactpoints.07-59
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