Ball-and-roller bearing

Details Ball-and-roller bearing Ball-and-roller bearing

1993-06-28

1994-03-08

Footland, Lenard A.

Bearings

Rotary bearing

Antifriction bearing

384568, 384569, 384625, 384912, 384913, 420 47, F16C 3362

Patent

active

052922006

ABSTRACT:
At least one of the inner race, the outer race and rolling elements in the improved ball-and-roller bearing is made of an alloy steel that contains 0.1-1.2 wt % of C, 3.0-18.0 wt % of Cr, 0.01-1.5 wt % of Si, 0.3-1.5 wt % of Mn, up to 2.5 wt % of Mo, up to 0.002 wt % of O.sub.2 and up to 0.015 wt % of S and which is subjected to plasma-assisted carburization to such an extent that the relative surface carbon area is at least 15% the surface carbon concentration is in the range of 1.6-3.5 wt % and the amount of surface retained austenite is in the rang of 20 vol %-45 vol %. The bearing can work effectively for a prolonged lifetime even if it is placed under hostile conditions as exemplified by an increased areal pressure of load and entrance of foreign matter into lubricating oils.

REFERENCES:
patent: 4183774 (1980-01-01), Balleret
patent: 5030017 (1991-07-01), Murakami et al.
patent: 5122000 (1992-06-01), Matsumoto et al.
patent: 5147140 (1992-09-01), Murakami et al.

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