Micrometers SERIES 102 - Ratchet Thimble Micrometer * More accurate in one-handed operation: inexperienced operators measure significantly more accurately with this micrometer. * Heat-insulated frame. * 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. * Measuring faces: Carbide B Ratchet Speeder Technical Data Flatness: Parallelism: Measuring force: 0.6 m / .000024" 2 m / .00008" 5-10N Internal structure Thimble sleeve Speeder sleeve Ratchet mechanism Greatly improved accuracy and repeatability Measurement 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. Table showing results of test 25 Number of measurements 102-701 Thimble Micrometer Conventional micrometer (non-constant-force device) 20 15 10 5 0 -4 -3 -2 -1 0 +1 +2 Measurement error (m) +3 +4 SPECIFICATIONS Metric Code No. 102-701 102-707 102-702 102-708 Range 0 - 25 mm 25 - 50 mm Graduation 0.01 mm 0.001 mm 0.01 mm 0.001 mm Accuracy Graduation Accuracy .0001" .0001" Price 54.00 60.20 61.70 78.10 Mass 180 g 2 m 270 g Inch Code No. 102-717 102-718 Range 0 - 1" 1 - 2" Price 60.20 78.10 Mass 180 g 270 g DIMENSIONS 30.3 2.8 27.5 14.5 3 15 Unit: mm 50 o19 o6.35 5 26 7 30 25-50mm measuring range model 8 55.3 27.5 2.8 25 11 B-15 Mitutoyo operates a policy of continuous improvement that aims to provide the customer with the benefit of the latest technological advances. Therefore the company reserves the right to change any or all aspects of any product specification without notice.