To provide a wheel bearing device can inhibit deterioration of teeth of a driving force receiver for a long period of time without the need for a thermal treatment thereof.
A driving force receiver 20 having a plurality of teeth 21 arranged radially in a direction perpendicular to the axial direction is formed on an end surface 13a of a cylindrical portion 13. The driving force receiver 20 is formed, after a swaging portion is formed on the end surface 13a of the cylindrical portion 13, through a plastic deformation by having, for example, a tooth formation punch pressed thereto. A phosphate coating film by parkerizing treatment is formed on a surface of each tooth 21 of the driving force receiver 20 and across the end surface 13a of the cylindrical portion 13.
IWAMOTO KIYOKANE
TAKIMOTO MASAO
HARADA KATSUYUKI
YASUNO HITOSHI
KATO KENJI
| JP2006022882A | 2006-01-26 | |||
| JP2008162450A | 2008-07-17 | |||
| JP2009293686A | 2009-12-17 |
| WO2006111146A2 | 2006-10-26 |
Mio Kawasaki
Goromaru Masami