Small Tool Instruments and Data Management New Outside Micrometer Ratchet Thimble Micrometer Catalog No. E4273-101/102 A new generation of micrometer. The Ratchet Thimble outside micrometer employs a new constant measuring force device* that ensures consistent and reliable measurements even for users inexperienced in operating a micrometer with only one hand. * Patented: USA, China, Germany, UK, France Patent pending: Japan101/102 Series Outside Micrometer Ratchet Thimble Micrometer ONE-HANDED New Style Ratchet Thimble with new mechanism Ratchet function works both from the thimble and the speeder, allowing easy one-handed operation. Thimble (ratchet) Speeder (ratchet) Speeder is always available for quick rotation of spindle. Clearly audible ratchet operation for reassurance that measurement is being performed at constant, preset force. One-handed Operation One-handed Operation Mitutoyo conventional More accurate in one-handed Ratchet Thimble micrometer micrometer (non constant force device) operation: test results show 11 inexperienced users measure significantly more accurately with 0.5 0.5 the new micrometer. 1213 4552 3 4 Error (max, m) Error (max, m) Inexperienced user Experienced user 2 Dispersion ( , m) Dispersion ( , m)