Patent ID: 8128291
Filing Date: 2012-03-06
Classification: F16C

Abstract:
1. A needle roller bearing comprising: an outer ring comprising a plurality of split outer ring members, the split outer ring members split by parting lines extending in the axial direction of the bearing; a plurality of needle rollers rotatably arranged on the raceway surface of said outer ring; and a retainer retaining said plurality of needle rollers, wherein a curvature radius r said split outer ring members each have an engagement part engaging with a housing to be positioned, at a position shifted from the center in its circumferential direction; wherein each said split outer ring member has an engagement click provided at a part of an end in its width direction, the engagement click protruding toward the inner side in its diameter direction and extending around the split outer ring member less than 360 degrees to prevent said retainer from moving in the axial direction; and further wherein when a circumscribing circle of the needle rollers held by the retainer aligns with an inner diameter surface of one of the split outer ring members, a curvature center of the split outer ring member and a curvature center of the retain exist at different positions.