Nsk Corporation

Masahito Matsui

Hiroya Miyazaki

Takashi Murai

Hirotoshi Aramaki

Kinji Yukawa

Taketoshi Chifu

Yuji Miyamoto

Haruhisa Ashida

Takefumi Kichikawa

A crown type cage for a ball bearing includes an annular main portion, a plurality of pillar portions protruding in an axial direction from the main portion at predetermined intervals in a peripheral direction, and a spherical pocket formed between the adjacent pillar portions and capable of holding balls. The pillar portion has a pair of claw portions of which tip end portions are spaced apart from each other, and a connection portion that connects the pair of claw portions. A bottom surface of the main portion is provided with a part protruding in the axial direction.

Crown-shaped retainer for ball bearing, and ball bearing

A split bearing ring according to the invention includes two or more split portions into which the split bearing ring is divided with respect to a circumferential direction. Surfaces of the split portions other than circumferential end faces of the spit portions have hardness of HRC 59 or higher, the surfaces of the split portions other than the circumferential end faces are quenched and tempered, and the surfaces of the split portions other than the circumferential end faces have a prior austenite grain size of No. 6 or above. The split portions are formed by applying a load to a bearing ring such that stress generated on one end side of the bearing ring with respect to an axial direction is larger than stress generated on the other end side of the bearing ring with respect to the axial direction.

Method for manufacturing split bearing ring

A seal member with its base end connected to a metal core has three seal lips. The thickness of the tip end of the intermediate seal lip in the intermediate position is d, and the thickness of the base end is d. The thickness of the tip end of the innermost inner seal lip is Dand that thickness of the base end is D. In this case, at least part of the base end of the intermediate seal lip and inner seal lip has its thickness regulated to be 0.2&#xb7;d&#x2266;d&#x2266;0.8&#xb7;d, and 0.5&#xb7;D&#x2266;D&#x3c;D. The tip edge of the inner seal lip is fitted onto the outer peripheral surface of the radially inside cylindrical portion of a slinger with substantially zero interference. Consequently, even if the slinger and metal core are displaced relative to each other, excellent seal performance is secured while increase of torque is inhibited.

Seal assembly, and rolling bearing and hub unit assembled therewith

Retainer for roller bearing

In the angular contact ball bearing, the respective conditions of the inner race dimensions are designed most suitably to prevent the shoulder portion of the inner race from being opened outwardly, thereby being able to prevent a slipping phenomenon from occurring between the inner race and shaft.

Growing community of inventors

Kanagawa, Japan

Masahito Matsui