Cage for e.g. single-row rolling bearing in machine tool spindle, has cage ring divided into parts, where cage is provided with large gap between cage inner and outer diameter, and race rings whose surfaces are provided with lubricant

摘要

The cage has a cage ring (2) divided into two parts at certain location and provided with a retainer (3) for rolling elements. The parts are arranged concentric to each other. Recesses (4) are formed at a surface of the cage, and lubricant is conveyed into the recesses. Quotient of density and modulus of elasticity is greater for a material of the divided cage ring than that of a material of a closed ring, where the cage is provided with a large gap between cage inner and outer diameter, and opposite surfaces of race rings are provided with the lubricant outside a rotational space.