Bearings – Rotary bearing – Antifriction bearing
Patent
1991-11-26
1992-09-15
Hannon, Thomas R.
Bearings
Rotary bearing
Antifriction bearing
384912, F16C 3362
Patent
active
051471400
ABSTRACT:
A ball-and-roller bearing provided with a bearing ring and rolling element has the surface hardness of at least one of the bearing ring and rolling element of Hv 900 or more and the minimal compression residual stress of 100 kgf/mm.sup.2 or more in the depth from the surface of the bearing ring and/or rolling element to the depth equivalent to a 2% of the mean diameter of the rolling element and at the same time, the bearing is closely sealed to prevent any foreign particles from being ingressed thereinto, thus making possible a significant improvement of its longevity.
REFERENCES:
patent: 4555186 (1985-11-01), Scruggs
patent: 4659241 (1987-04-01), Bamberger et al.
patent: 4871268 (1989-10-01), Furumura et al.
patent: 4930909 (1990-06-01), Murakami
patent: 5011304 (1991-04-01), Murakami et al.
Special Steel Handbook, (First Edition Compiled by the Electric Steel Manufacturing Laboratories, Published by Rikougaku Sha on May 25, 1969) p. 21, ch. 10.
Technical Journal (No. 646 Compiled by Nippon Seiko Inc. and published in Sep., 1986) pp. 18-25.
Zaretsky, Erwin V., "Effect of Component Differential Hardnesses on Residual Stress and Rolling-Contact Fatigue", NASA TN D-2664, (1965), pp. 1-14.
Murakami Yasuo
Okita Shigeru
Shirota Shinichi
Hannon Thomas R.
NSK Ltd.
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