E.i. Dupont De Nemours and Company

Chiba Dies Co., Ltd.

Teisuke Bushimata

Kenichi Shinohara

Kiyoshi Ueno

An apparatus for testing abrasion and a test method for testing the frictional wear characteristics of materials and parts even when a lubricant is used. The abrasion and test method enables reliable abrasion tests to be carried out in which good conformity with the sliding characteristics in actual pieces of equipment can be achieved.

Abrasion tester and test method

A gear is provided with double rows of teeth having the same pitch circle, which are deviated from each other in the circumferential direction. The gear can be mutually engaged with another counterpart identical with no backlash between the meshed teeth, whereby a rotary motion can be efficiently and smoothly transmitted between the rotating gears engaged without involving vibrations and noises.

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Tokyo, Japan

Teisuke Bushimata