Patent ID: 7101088

Claim:
A cylindrical roller bearing comprising: an inner ring; an outer ring; a plurality of cylindrical rollers arranged between the inner ring and the outer ring in a freely rollable manner; and a cage made of a synthetic resin, in which the cage comprises an annular section, a plurality of pillars extending in one axial direction from an inside surface of the annular section, and a plurality of pockets, which are formed between circumferential direction side faces of the pillars positioned adjacently in a circumferential direction, and hold the cylindrical rollers in a freely rollable maimer, wherein the circumferential direction side faces of the pillars of the cage comprise, at a base end inner circumferential section, a roller guide section, which is formed as a circular arc surface that follows the rolling contact surface of the cylindrical roller, and guides the rolling contact surface of the cylindrical roller when centrifugal force causes the pillar to undergo outward elastic deformation during rotation, and comprise, at the tip end inner circumferential section, a roll-off section, which is recessed farther toward the circumferential center of the pillar than the roller guide section, and prevents radial contact pressure from occurring with the rolling contact surface of the cylindrical roller when centrifugal force generated during rotation causes the pillar to undergo outward elastic deformation.