Patent ID: 7707723
Filing Date: 2010-05-04
Classification: F04B,F16C,Y10T

Abstract:
1. A method of producing a roller thrust bearing sandwiching between inner and outer rings a plurality of rows of rollers held in a cage to receive a thrust load exerted between said inner and outer rings, comprising the steps of: forming said cage to have a pocket accommodating a plurality of said rollers; forming said rollers to have a length L and a diameter Da, wherein Da is 5 mm or less, and the ratio L/Da is greater than or equal to 1, and less than or equal to 10; and crowning all of said rollers of said plurality of rows and arranging said rollers in said pocket to provide reduced differential slip, although contact surface pressure attributed to said thrust load exerted on said plurality of rows of rollers by said inner and outer rings is larger than when said pocket has arranged therein a plurality of rollers all having a straight profile; the method further comprising arranging said rollers in said pocket such that the rollers held by the pocket have respective end surfaces in direct contact with each other, and the center axes of the rollers held by the pocket are substantially aligned.