Roller Bearing and Method for Manufacturing the Same

Abstract

Spherical particles having diameters of 100 μm or less are projected on a surface of a tapered roller so as to form recesses and protrusions, and abrasive particles are then projected thereon so as to remove the protrusions. The abrasive particles result from adhering 5 mass % diamond grains with an average diameter of 10 μm on surfaces of 1 mm-diameter rubber particles. As a result, multiple recesses having circular openings of 50 μm or less are formed on the surface of the tapered roller at intervals of 200 μm or less. These recesses become moderate oil pools, heightening the oil film formation capability of the roller surface, and thus torque of the tapered roller bearing may be decreased.

Dependencies are inferred from the claim text.