| 摘要 |
In a one-way clutch, an outer ring has an internal portion whose hardness is substantially the same as that of its periphery, both hardnesses preferably being HRC 55 or more. When sprags interposed between the outer ring and inner ring are engaged with an inner peripheral surface of the outer ring and press the inner peripheral surface radially outwardly, the internal portion having the hardness of HRC 55 or more backs up the inner peripheral surface to prevent the inner peripheral surface from being deformed radially outwardly. Therefore, "roll-over" can be prevented and the maximum transmission torque is increased.
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