Rolling bearing

Details Rolling bearing Rolling bearing

1993-08-04

1995-01-31

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

F16C 1900

Patent

active

053854128

ABSTRACT:
A rolling bearing is composed of an outer race having an inner-race raceway on an outer peripheral wall thereof, an outer race having an outer-race raceway on an inner peripheral wall thereof, a plurality of rolling elements interposed for rotation between the outer-race raceway and the inner race, and a lubricant composition filled in a space, which is defined between the inner-race raceway and the outer-race raceway, at a position where the plurality of rolling elements are disposed. The rolling bearing features: (a) at least one of the inner-race and outer-race raceways is made of steel having an oxygen content not higher than 6 ppm; (b) at least a raceway surface of said at least one raceway has been hardened by heat treatment; (c) the lubricant composition comprises as a base oil a synthetic lubricant having a kinematic viscosity of 60-160 cSt at 40.degree. C.; and (d) the lubricant composition further comprises 18-28 wt. % of a thickener which comprises a polyurea compound.

REFERENCES:
patent: 4481123 (1984-11-01), Hentschel et al.
patent: 4696581 (1987-09-01), Tsushima et al.
patent: 4992111 (1991-02-01), Yamada et al.
patent: 5282689 (1994-02-01), Imamura et al.
"New Shell Alvania Greases", 1982 (exerpt English translation attached) Shell Product Information, 1983.
"SKF MR Produced Rolling Bearing Steels", SKF Ball Bearing Journal, 231(1), 1987.
"Bearing Steel Development", SKF Ball Bearing Journal Special '89.
"Rolling Contact Fatigue Life of Various Kinds of Hardness Steels and Influence of Material Factors on Rolling Contact Figure Life", Tsushima et al., 1988.
"Kikai No Kenkyo" (Study on Machines), 40(10), 1988.

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