METHOD OF MANUFACTURING HUB UNIT FOR SUPPORTING WHEEL

摘要

PROBLEM TO BE SOLVED: To enable a dimension of the outer diameter of a counterlock to obtain a proper hub unit for supporting a wheel with ease and to enhance efficiency of axial force when calking is operated.

SOLUTION: The method includes the step of performing oscillating calking for a cylindrical part for calking formed on the axial end side by a calking tool 18 and the step of supporting end face 29 of a counterlock part 28 by the counterlock end face receptacle tool 30 when a second inner ring 3 is fixed to a first inner ring 2 by a formed calking part 16. The hub unit can properly maintain a dimension of the outer diameter of the counterlock when contact point of the receptacle is less than 250 MPa. In addition, the hub unit successfully secures the dimension of the outer diameter of the counterlock so as not to constrain the hub unit in radial direction in that case and enhances the efficiency of the axial force when the calking is operated.

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