Patent Number: 6,254,277

Title: Roller bearing

Abstract: There is provided a roller bearing in which contact stress between a roller and a raceway is uniformized by optimizing a configuration of a clearance between the roller and the raceway. A configuration of an outer circumferential surface (8) of a tapered roller (6) of a tapered roller bearing (1) is defined so that a clearance of Y(x)=kYp(x), which results from multiplying an equation Yp(x) for uniformizing contact stress between infinite-width plate and tapered roller by a positive number k=1.5-10, is formed between the raceway surface (4, 5) and the outer circumferential surface (8) of the tapered roller (6). The tapered roller (6) relaxes concentration of contact stresses, improving the durability.

Inventors: Nagai; Yasuaki (Kashiwara, JP), Shitsukawa; Kenji (Osaka, JP), Asano; Kenji (Osaka, JP), Shibata; Masamichi (Mie, JP)

Assignee: Koyo Seiko Co., Ltd.

International Classification: F16C 33/30 (20060101); F16C 33/36 (20060101); F16C 33/58 (20060101); F16C 19/36 (20060101); F16C 19/22 (20060101); F16C 19/34 (20060101); F16C 019/26 ()

Expiration Date: 07/03/2018