Nsk Corporation

Keisuke Kimura

Katsuhiko Tanaka

Hiroshi Nakajima

Toru Takamizawa

Shoji Noguchi

Kazuhiro Uemura

Ikunori Sakatani

A ball bearing comprises an inner ring, an outer ring and a plurality of balls disposed between inner and outer rings. The number of the balls is made to be not smaller than 10. Lubricant is also enclosed between the inner and outer rings in such a manner that the amount of the lubricant is regulated not more than 8% of the volume of a space between the inner and outer rings.

Ball bearing

A rolling bearing having a plurality of rolling elements interposed between an inner race and an outer race, wherein the number of the rolling elements is selected to be equal to a number having, as divisors, main low-frequency peak components of geometrical error of the inner and outer races to be assembled.

Rolling bearing and spindle apparatus

Growing community of inventors

Kanagawa, Japan

Keisuke Kimura