Shell type needle roller bearing and method of producing the sam

Details Shell type needle roller bearing and method of producing the sam Shell type needle roller bearing and method of producing the sam

1997-07-25

1998-12-15

Hannon, Thomas R.

Bearings

Bearing-surface treatment

29898061, 2989813, 384559, 384565, F16C 3364

Patent

active

058488464

ABSTRACT:
A method of producing a shell type needle roller bearing having a shell type outer ring whose opposite ends in the axial direction thereof are bent radially inwardly to form flanges; and a plurality of needle rollers arranged along an inner circumferential area of the outer ring. The method comprises the steps of: a) bending one end of the outer ring radially inwardly to form a flange portion on one end of the outer ring for forming the outer ring in the specified shape; b) assembling hardened/tempered needle rollers or un-hardened needle rollers into the outer ring; c) bending other end of the outer ring radially inwardly to form another flange to form a final shape of the needle roller bearing; d) performing a carbonitriding treatment to the assembled needle roller bearing; and then e) performing hardening and tempering treatments to the assembled needle roller bearing.

REFERENCES:
patent: 2383727 (1945-08-01), Lewis
patent: 5338377 (1994-08-01), Mitamura et al.
patent: 5397188 (1995-03-01), Yoshizuka et al.

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