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   Micrometers

   SERIES 102 – Ratchet Thimble Micrometer

   •	More accurate in one-handed operation:         •	Rotating the thimble/speeder                                                         Technical Data
   	 inexperienced operators measure significantly  	 when the workpiece is between
   	 more accurately with this micrometer.          	 the anvil and spindle causes the                                                     Flatness: 		            0.6 m/.000024"
   •	Heat-insulated frame.                          	 ratchet mechanism to operate                                                         Parallelism: 		         2 m/.00008"
   •	Ratchet function works both from the thimble   	 and apply a constant measuring                                                       Measuring force: 	      5-10N
   	 and the speeder.                               	 force to the workpiece.
                                                    •	Clearly audible ratchet operation for reassurance                                    Internal structure
                                                    	 that measurement is being performed at                                                                           Speeder sleeve
                                                    	 constant, preset force.                                                                          Thimble sleeve
                                                    •	The speeder is always available for quick rotation
B                                                   	 of spindle.                                                                                                  Ratchet mechanism
                                                    •	A simple mechanism, which requires neither parts
                             Ratchet  Speeder       	 maintenance nor special technique, is employed
                                                    	 in the constant-force device.
                                                    •	Measuring faces: Carbide                                                             Greatly improved accuracy and
                                                                                                                                           repeatability

                                                    102-701                                                                                Measurement results of one-handed operationNumber of measurements
                                                                                                                                           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 Thimble Micrometer

                                                                                                                                                                                                        Conventional micrometer
                                                                                                                                                      20 (non-constant-force device)

                                                                                                                                                      15

                                                                                                                                                      10

                                                                                                                                                        5

                                                                                                                                                        0 -4 -3 -2 -1 0 +1 +2 +3 +4
                                                                                                                                                                                     Measurement error (µm)

   SPECIFICATIONS

   Metric

   Code No.            Range          Graduation    Accuracy      Mass                                                             Price
   102-701           0-25 mm         0.01 mm       ±2 µm        180 g                                                          54.00
   102-707                            0.001 mm                                                                                   60.20
   102-702           25-50 mm        0.01 mm      Accuracy      270 g                                                          61.70
   102-708                            0.001 mm      ±.0001"                                                                      78.10
                                                                  Mass
   Inch                               Graduation                  180 g                                                            Price
                                        .0001"                    270 g                                                          60.20
   Code No.          Range                                                                                                       78.10
   102-717           0-1"
   102-718           1-2"

   DIMENSIONS

                             5 30.3 14.5 3 15                 50                                                                 Unit: mm
                             2.8 27.5

           7         26
                 11                               6.35

                                                                               30
                                                                                                                            19
                                                    25-50mm measuring range model

                                                        8 55.3
                                                         2.8 25 27.5

                                      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.

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