B-14BMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.• More accurate in one-handed operation: inexperienced operators measure signicantly more accurately with the new micrometer. • Ratchet function works both from the thimble and the speeder.• Rotating the thimble/speeder when the workpiece is between the anvil and spindle causes the ratchet mechanism to operate and apply a constant measuring force to the workpiece. • Clearly audible ratchet operation for reassurance that measurement is being performed at constant, preset force. • The speeder is always available for quick rotation of spindle. • A simple mechanism, which requires neither parts maintenance nor special technique, is employed in the constant-force device.• Heat-insulated frame.• Measuring faces: Carbide.Ratchet Thimble Micrometer SERIES 102 — Outside MicrometersGreatly Improved Accuracy and RepeatabilityTechnical Data • Measuring force: 5 to 10 N• Standard accessories: Reference bar, 1 pc. (except for measuring range 0 to 25 mm (0 to 1 in) models) Spanner (301336), 1 pc.Internal StructureMeasurement results of one-handed operation A beginner performed a test by measuring a workpiece 20 times using a conventional micrometer and a Ratchet Thimble Micrometer. Thimble sleeveSpeeder sleeveRatchet mechanism Table showing results of test0510152025- 4- 3- 2- 10+ 1+ 2+ 3+ 4Measurement error (µm)Number of measurementsThimble MicrometerConventional micrometer (non-constant-force device)DIMENSIONSUnit: mmSPECIFICATIONSMetricOrder No.Range (mm)Graduation (mm)Maximum permissible error JMPE (µm)Flatness (μm)Parallelism (μm)Mass (g)102-7010 - 250.01±20.62180102-7070.001102-70225 - 500.01270102-7080.001InchOrder No.Range (in)Graduation (in)Maximum permissible error JMPE (in)Flatness (in)Parallelism (in)Mass (g)102-7170 - 10.0001±0.00010.0000240.00008180102-7181 - 2270An inspection certicate is supplied as standard. Refer to page U-9 for details.(Spindle)(Measuring face)(Anvil)(Minimum measuring length)L251568ø19ø6.35bc2aø6.3ø6.3102-701102-708102-702102-707Order No.Labc102-70105262.5102-707102-702257.830102-708RatchetSpeeder

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