STRUCTURE OF CAGE FOR BEARING

摘要

PROBLEM TO BE SOLVED: To contribute to smoother movement by machining a retaining bore for supporting a rolling element to a configuration not to disturb a rolling motion of the rolling element and also by making a cage as a segment type construction to be free to center itself. SOLUTION: The cage 3 has a structure in which a plurality of pieces 7 are secured by wrapping with a linear member 9 around an engagement groove 8 formed on top and bottom of the piece 7 and an intermediate part thereof in an outer circumferential direction wherein further pieces 7, 7 are set to have a minute gap g therebetween. Retaining bores 10 for holding a plurality of rolling members 4 are formed on these pieces 7. The retaining bore 10 is dimensioned slightly larger at least than the roller member 4 corresponding to an external form thereof, and a corner angle part 10e is machined to be rounded out in an arc-shape with a larger radius of curvature as compared with the corner part of the end face side in longitudinal direction of the roller member 4.