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DiskMicrometersSERIES223,123•Canbeusedformakingroottangentmeasurementsonspurgearsandhelicalgears.•Determinationoftheroottangentlength:referto“QuickGuidetoPrecisionMeasuringInstruments”onpage02-80.•EquippedwithRatchetStopforconstantmeasuringforce.123-101SPECIFICATIONSMetricCodeNo.Range(mm)Mechanicalcountermodel0-2525-50223-101223-102Graduation(mm)MaximumpermissibleerrorJMPE(μm)Flatness(μm)Parallelism(μm)Anvildia.(mm)Measurablemodule0.010.01±4±4±6±7±8±9ø200.5-6ø200.5-6ø300.7-11111.6446789Range(in)Graduation(in)MaximumpermissibleerrorJMPE(in)Flatness(in)Parallelism(in)Anvildia.(in)MeasurablemoduleMechanicalcountermodel0-1223-125Analog123-125123-126123-127123-1280-11-22-33-40.0010.001±0.0002±0.0002±0.00030.000040.0002ø0.7870.5-60.000040.00020.0003ø0.7870.5-6*Themeasuringdiskshavecarbidetips.•Standardaccessories:Settingstandard,1pc.(exceptformeasuringrange0to25mm(0to1in)models),Spanner(301336),1pc.Note:Roottangentlengthmeasurementisnotavailableforsometypesofgears.02-35Analog123-101123-113*123-102123-114*123-103123-115*123-104123-116*123-105123-106123-107123-108123-109123-110123-111123-112InchCodeNo.0-2525-5050-7575-100100-125125-150150-175175-200200-225225-250250-275275-300SpecialPurposeMicrometers