Needle roller bearing and its manufacturing method

Details Needle roller bearing and its manufacturing method Needle roller bearing and its manufacturing method

2006-06-30

2009-08-11

Kamen, Noah (Department: 3747)

Internal-combustion engines

Transmission mechanism from piston

Crankshaft and connecting rod

C074S57900F, C384S572000

Reexamination Certificate

active

07571706

ABSTRACT:
A needle roller bearing comprises a plurality of needle rollers and a retainer. The retainer includes a pair of annular parts and pillar parts connecting the pair of annular parts so as to form pockets in which the needle rollers are housed. A sidewall surface of the pillar part has a sheared surface punched by a punching blade so that the pockets are formed, and a fractured surface fractured by a material pressed by the punching blade. The needle roller is guided by the sheared surface.

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