| 摘要 |
PROBLEM TO BE SOLVED: To contrive wear suppression of a pin body part and an inside surface of a rolling element through which the pin body part passes by forming a spiral groove on at least one of an inside diameter surface of a through hole of the rolling element and an outer peripheral surface of the pin body part passing through the through hole. SOLUTION: In a rolling bearing constituted by interposing a plurality of rolling elements so as to contact with both raceway surfaces between an outer race 1 in which a cylindrical inside diameter surface is made a raceway surface and an inner race 2 having an outside diameter raceway surface opposed to an inner peripheral raceway surface part of the outer race 1, a through hole is formed at the center in each rolling element 3 and a pin 4 is inserted into this center through hole. In each pin 4, both the tip parts are supported by annular side plates 5a, 5b and a pin type cage is constituted of these parts. In this case, a spiral groove 3b for introducing lubricant is formed on an inside diameter surface 3a of each rolling element 3. Thus, lubricant interposing around the rolling element 3 at the time of rotating the rolling element 3 is introduced into the inside diameter surface of the rolling element 3, an oil film is formed, metallic contact is prevented and wear suppression is contrived.
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