Rolling-contact shaft with joint claw

Details Rolling-contact shaft with joint claw Rolling-contact shaft with joint claw

2006-08-10

2011-11-29

Roe, Jessee R. (Department: 1733)

Metal treatment

Stock

Carburized or nitrided

Reexamination Certificate

active

08066826

ABSTRACT:
A steel-made rolling-contact shaft with a joint claw improved in both the rolling contact fatigue life at the raceway and the static fracture strength (torsional strength) at the claw includes a joint claw at one end, and has a portion of the outer cylindrical surface functioning as a raceway of a needle roller qualified as a rolling element of a needle bearing. The joint claw is subjected to tempering by induction heating. A nitrogen-enriched layer is formed at the surface layer of the rolling-contact shaft with a joint claw. The grain size number of austenite grains in the nitrogen-enriched layer exceeds number 10. The hydrogen content of the rolling-contact shaft with a joint claw is not more than 0.5 ppm.

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