An inner race 5 is retained by a crimped portion 30, so that a
pre-load
is applied to rolling elements 6. A bearing unit for wheel support 1
is connected to a constant velocity joint 2 through tightening of a
nut 24. By regulating the tightening force of the nut 24, at the
area of contact between the inside end of the crimped portion 30 and the
outside end of the outer ring of the constant velocity joint 14, the load
per unit length is controlled up to 125 N/mm, or the surface pressure is controlled
up to 1.5108 Pa. Consequently, a bearing unit for wheel support
is realized at a low cost with the pre-load securely applied, preventing unpleasant
noise from occurring during operation, and preventing play due to plastic deformation.
