B-71BMitutoyo operates a policy of continuous improvement that aims to provide the customer with the benet of the latest technological advances.Therefore the company reserves the right to change any or all aspects of any product specication without notice.B-71B■ How to Read the ScaleMicrometer with standard scale (graduation: 0.01mm)The thimble scale can be read directly to 0.01mm, as shown above, but may also be estimated to 0.001mm when the lines are nearly coincident because the line thickness is 1/5 of the spacing between them.Micrometer with vernier scale (graduation: 0.001mm)The vernier scale provided above the sleeve index line enables direct readings to be made to within 0.001mm.(1)Sleeve scale scale reading.21mm(3)Reading from the vernier scale markingand thimble graduation line+ .003mmMicrometer reading6.213mmThese drawings above are for illustration only and are not to scale(1)Sleeve scale scale reading+ 0.37mmMicrometer reading7.37mm0545403530(1)(2)08604253025201510(1)(2)Approx. +1µmApprox. +2µmThimble scaleIndex lineThimble scaleIndex line08604253025201510(1)(2)(3)08604253025201510(1)(2)(3)■ Measuring Face Detail■ Measuring Force Limiting Devicespindleø6.35ø6.330’spindleø830’ø7.95Carbide tipCarbide tipThird decimal placeSecond decimal placeFirst decimal placeMillimetresTens of mm0299mm64504520Third decimal place on vernier scale ( 0.001 mm units)Vernier reading 0.004mm (2)Fiducial line+Counter*Indicates four digits.(2)(1)(1)Micrometer with mechanical-digit display (digital step: 0.001mm)Note) 0.37 mm (2) is read at the position where the sleeve ducial line is aligned to the thimble graduations.Note) 0.21 mm (2) is read at the position where the index line is between two graduations (21 and 22 in this case). 0.003 mm (3) is read at the position where one of the vernier graduations aligns with one of the thimble graduations.Note) 0.004 mm (2) is read at the position where a vernier graduation line corresponds with one of the thimble graduation lines.Audible in operationOne-handed operationRemarksRatchet stopYesUnsuitableAudible clicking operation causes micro-shocksFriction thimble (F type)NoSuitableSmooth operation without shock or soundRatchet thimble(T type)YesSuitableAudible operation provides conrmation of constant measuring forceRatchet thimbleYesSuitableAudible operation provides conrmation of constant measuring force


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