Wheel-support rolling bearing unit and a method...

Details Wheel-support rolling bearing unit and a method... Wheel-support rolling bearing unit and a method...

2005-08-16

2005-08-16

Compton, Eric (Department: 3726)

Metal working

Method of mechanical manufacture

Process for making bearing or component thereof

C029S898070, C029S898140, C029S894361, C029S894362, C029S509000, C072S370110, C301S105100, C384S544000

Reexamination Certificate

active

06928737

ABSTRACT:
A cylindrical portion10is not quenched, and its hardness of a cylindrical portion10is set at Hv200 to 300. An average cross sectional area of the crystal particle in this portion is set to be within 0.03 mm2. Accordingly, when a caulking portion is formed by expanding the cylindrical portion10bto an inner ring3to a hub2bmade of carbon steel, cracks or the like are not formed in the resultant caulking portion.

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