Nsk Corporation

Ken Inaba

Yasushi Morita

Kenji Yakura

Sumio Sugita

Naoki Matsuyama

Takaaki Anzai

Yoshifumi Inagaki

Mitsuho Aoki

Yuu Koiwa

Saburou Azumi

A spindle unit comprises a rolling bearing including an outer ring having an outer ring raceway on an inner peripheral surface, an inner ring having an inner ring raceway on an outer peripheral surface, and rolling elements provided rollably between the outer ring raceway and the inner ring raceway, whereby a spindle is borne rotatably in a housing, and a grease supply system for supplying a grease to an inside of the rolling bearing, wherein the grease supply system supplies the grease such that a supply amount in one shot is set to 0.004 cc to 0.1 cc.

Rolling bearing, grease supply system, spindle unit, grease supply method, and grease supply program

A cylindrical roller bearing with synthetic resin cages, in which heat generation of the bearing during high speed rotation is suppressed, while sufficient rigidity and strength is secured, so that the bearing is excellent in high speed performance. The cylindrical roller bearing () has synthetic resin cages () each including an annular portion () disposed in one axial end portion of the cage (), and a plurality of columnar portions () extending from a side surface of the annular portion (). The minimum inner diameter d1 of the annular portion () is set to be smaller than the maximum inner diameter d2 of each columnar portion (), and the inner diameter of the columnar portion () is set to be equal to the inner diameter d1 of the annular portion () over a range of length not longer than &#x2154; of the whole length of the columnar portion ().

Double row cylindrical roller bearing

Growing community of inventors

Kanagawa, Japan

Ken Inaba