Mitutoyo Corporation

Tomio Omori

Osamu Saito

Nobuyuki Hayashi

Yuji Fujikawa

Shuuji Hayashida

Yuichi Ichikawa

Takahiro Nakamura

Yuuzou Hashimoto

A measuring instrument that includes a tubehaving a female threadand a spindlehaving a lead screwscrewing with the female threadand capable of being advanced and retracted in an axial direction along with rotation around the axial center, and measures dimensions etc. of a workpiece according to displacement in an axial direction of the spindlebased on a rotation amount of the spindleAccording to this measuring instrument, a pitch P of the lead screwis twice as large or more than the difference between an external diameter R and a core diameter r thereof, and the difference between the external diameter R and the core diameter r is one-fifth or less of the external diameter R. Because of the lead screwwith the large pitch, the spindlecan be moved at high speed, thus enhancing operational performance of the measuring instrument.

Measuring instrument

Growing community of inventors

Kure, Japan

Tomio Omori