Roller bearing design with curved surfaces on rollers

摘要

The rolling surface (3a) and the radiused part (Rb) between surface (3a) and endface (3b) go smoothly over into one another via a first bend (R1), using a second bend (R2) as the smooth transition between the radiused part (Rb) and the endface (3b) of the roller (3). Surfaces (3a,3b,Rb) are all ground simultaneously by a tool having suitably shaped surfaces to grind those of the roller (3), assisted by corresponding bend areas between the tool surface used to grind the rolling and endfaces. A bearing has ground rollers held between outer and inner rings, and the centres of the radii of curvature of the radiused tool part of the respective rollers lie on the boundary between the rolling and radiused parts. In this way the radius (R1) from the centre line of the bearing roller at the centre of the radius of curvature of the radiused part of the roller corresponds to the radius of the roller endface.