・When the Cam Clutch engages,

At the contact surfaces of cams and races, the compression stress occurs in direct proportion to engagement torque. Contact surface of inner/outer races move infinitely with respect to each engagement, while that of the cams are almost stable. Therefore, the fatigue caused by this stress will then result in the surface pitting of cams.

Refer to the fatigue life curve, and check the expected life.

Notes

• 1. In cases where the load applied to the Cam Clutch changes, or where vibrational loads are encountered, repeated torque loads can be applied during a single clutch engagement. The figure on the right shows the actual torque acting on the cam clutch of a machine with load variation. When estimating fatigue life, any peak that shows a value greater than 1/2 of the maximum load torque should be counted as one engagement frequency.
• 2. Indexing usage involves a particularly high frequency of repeated loading, so it is important to check fatigue life.
• 3. When using a servo motor, the cam may wear faster than usual depending on the usage conditions. Please contact us when considering the use of servo motors.

・When the Cam Clutch overruns,

On the contact surfaces of cams and races, skids occur in direct proportion to the overrunning rotational speed.

Therefore it is important to pay particular attention to abrasions at the contact points.

As the contact pressure by the weak spring force F is low, with sufficient lubrication, these parts will not wear or abrade in a short time.

The wear life curve shows the wear life when lubricated under normal conditions (as described in the catalog), although it varies depending on the lubrication conditions. Abrasion life must be verified especially for applications involving high speed and long overrunning periods.