HEAT TREATMENT METHOD FOR ROLLING BEARING DEVICE FOR WHEEL AND COOLING DEVICE FOR INNER SHAFT

摘要

A heat treatment method applies heat treatment to a raceway surface of an outer ring while ejecting water to and cooling the entire outer peripheral surface of the outer ring. Also, the heat treatment method applies heat treatment to a raceway surface of an inner shaft while cooling a flange of the inner shaft by causing the flange to make contact with water. A cooling device has a holding section for holding the flange while causing the flange to make contact with the water.