Roller bearing
AssigneeJtekt Corporation
InventorsYasuhiro Kobayashi, Ryohei Hosaka
Life of this patent
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Abstract
A roller bearing capable of effectively improving the service life of the roller bearing is provided by performing surface treatment with coating. A cylindrical roller bearing includes: an outer ring having an outer ring raceway surface; an inner ring having an inner ring raceway surface that faces the outer ring raceway surface; and a plurality of cylindrical rollers rollably disposed between the outer ring raceway surface and the inner ring raceway surface. The inner ring raceway surface of the inner ring is provided with a black oxidation coating, and a rolling contact surface of each cylindrical roller is provided with a diamond-like carbon coating.
Claims2
A roller bearing, comprising:
- a fixed ring having a fixed raceway surface;
- a rotary ring having a rotary raceway surface that faces the fixed raceway surface;
- and
- a plurality of rollers rollably disposed between the fixed raceway surface and the rotary raceway surface,
- wherein, out of the rotary raceway surface and a rolling contact surface of each of the rollers, one of the surfaces is provided with a black oxidation coating and the other surface is provided with a diamond-like carbon coating, wherein a friction coefficient of the black oxidation coating is larger than the friction coefficient of the diamond-like carbon coating.
Dependencies are inferred from the claim text.