Nsk Corporation

Akiyoshi Yamaguchi

Toshiyuki Suzuki

Hiroyuki Sawai

Kunio Fukuda

Masahide Matsubara

Akiyoshi Honda

A roller cage made of metal for holding rollers of a roller bearing, includes: separation bars separately defining a plurality of window holes along a peripheral direction of the bearing with a constant interval thereamong. The window holes respectively receive said rollers therein. Each of the separation bars includes: a contact surface being formed by press-molding one of an outer diameter surface side end portion and an inner diameter surface side end portion thereof, and contacting with the rolling surface of the roller; and an expansion portion expanding to a radial direction of the bearing at the other of the outer diameter surface side end portion and the inner diameter surface side end portion which is not subjected to the press-molding.

Growing community of inventors

Kanagawa, Japan

Akiyoshi Yamaguchi