Thrust ball bearing

Details Thrust ball bearing Thrust ball bearing

1997-09-11

1999-07-13

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

384490, 384625, F16C 3362

Patent

active

059216840

ABSTRACT:
In a thrust ball bearing, the heat treating hardness and heat treatment hardening depth of a bearing ring 4a (4b) are prescribed such that, at any depth from the raceway surface 4a1 (4b1), the value which is seven times the dynamic shearing stress .tau..sub.ZY produced at a certain depth from the raceway surface 4a1 (4b1) by the rolling movement of the rolling element 4c does not exceed the hardness at that depth. More particularly, with Vickers hardness Hv=520 adopted as a reference hardness, heat treatment (for example, carburizing) is effected such that a hardened layer with Hv=520 is present at a depth not less than 4% of the diameter d of the balls 4c.

REFERENCES:
patent: 3677032 (1972-07-01), Suzuki
patent: 4696581 (1987-09-01), Tsushima et al.
patent: 5147140 (1992-09-01), Murakami et al.
patent: 5567508 (1996-10-01), Murakami

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