Patent ID: 6206574
Filing Date: 2001-03-27
Classification: F16C

Abstract:
A ball bearing comprising:a rotary member, part of which serves as an inner ring;an outer ring fitted on an outer circumferential portion of said inner ring;a plurality of balls interposed in ball holding grooves between said inner and outer rings; anda circumferential surface close to said ball holding grooves, in at least one of said inner and outer rings, with a stepped portion such that the lateral positional shift of said balls is prevented when said balls are introduced through a gap between said inner and outer rings while said outer ring is disposed eccentrically with respect to said inner ring during assembly of the ball bearing structure wherein said balls are maintained in equidistant positions within the ball holding grooves between said inner and outer rings by a ball holder that is incorporated into the ball beating structure after all balls have been introduced into the gap between said inner and outer rings and after the outer ring has been aligned concentrically with respect to the inner ring to move said balls into the holding grooves between said inner and outer rings.