To provide a holder for a rolling bearing which copes with the high speed rotation and high additional capacity of the rolling bearing, has high fatigue strength and less abrasion loss, and to provide its surface treatment method.
A base material for a press holder for a self aligning rolling bearing is manufactured by the press forming from a cold-rolled steel plate SPCC or a hot-rolled steel plate SPHD, and subjected to the primary heat treatment, the secondary heat treatment, and the cooling treatment. The primary heat treatment is the gas nitriding at the temperature of 400-590C. The secondary heat treatment is the treatment of keeping the plate at the temperature of 590-700C while restricting the plate in a straightening die. The cooling treatment is the quenching treatment by the water cooling or the like.
Yoshiaki Naito
Cui Shu Tetsu
Next Patent: CAGE FOR ROLLING BEARING