公开(公告)号：US20020121141A1

公开(公告)日：2002-09-05

申请号：US10024708

申请日：2001-12-21

Applicant: NSK LTD.

Inventor： Akihiro Kiuchi ,  Yoichi Matsumoto ,  Yasuo Murakami

IPC: G01N029/00

CPC classification number: F16C33/64 ,  F16C33/585 ,  F16C2240/54 ,  G01N2291/0234 ,  G01N2291/044 ,  G01N2291/2696 ,  Y10S148/906

Abstract: A surface to serve as a surface under ultrasonic inspection has a roughness of 0.4 nullmRa or less, and wherein all imperfections existing a controlled volume X corresponding to all cross sections of a raceway ring 1 assume a length of 0.2 mm or less as represented by the square root of areas of the imperfections. Accordingly, it is possible to provide a rolling bearing which does not become short-lived and obviates a concern about occurrence of cracking even when used in a harsh environment.

Abstract translation: 在超声波检查下用作表面的表面具有0.4mumRa或更小的粗糙度，并且其中存在对应于滚道环1的所有横截面的受控体积X的所有缺陷假定为0.2mm或更小的长度，如 平方根的不完整区域。 因此，可以提供一种不会变得短暂的滚动轴承，即使在恶劣的环境下使用也能够避免出现裂纹的担忧。