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Delayed Engagement Clutch Bearing

Delayed Engagement Clutch Bearing

Delayed Engagement Clutch Bearing

(OP)
Hello!

Have any of you out there heard of a delayed engagement clutch bearing?

A regular clutch bearing, of course, will allow a shaft freewheeling rotation in one direction, but not in the inverse. So the instant the direction of rotation of the shaft reverses the clutch bearing locks up and transmits the torque of the shaft through the bearing to whatever sprocket or device that the bearing is mounted into.

The correct designation for this type of bearing is a drawn cup roller clutch. We are currently using a Timken Fafnir bearing number RC-121610 for our application. It fits on a 3/4 inch shaft and has an outside diameter of 1 inch. It is rated for 206 IN-LBF torque.

However, we are facing few design constraints relative to the dimensions or the rated capacity of the bearing. The shaft size is not critical, nor is the outside diameter of the bearing, and the bearing is overrated for the application in terms of strength.

The problem I face is that this bearing engages the shaft on counterrotation very rapidly. I need the bearing to engage on counterrotation, but only after a minimum of ten degrees, preferably fifteen to twenty degrees.

Anyone heard of a lutch bearing that can do this? Or are there any other ideas of how to acheive the same effect simply?

Many thanks!

Strangelove (poepbf)

RE: Delayed Engagement Clutch Bearing

You can make a coupling for the shaft that engages after some
degree of counter rotation.  Due to impact inertia it will only be good for slow speed application, for high speed I think you have to  order a custom made bearing.

RE: Delayed Engagement Clutch Bearing

A centrifugal clutch would work with a delay time but iy would need to be much more than 10º maybe you can add a flexible impact coupling that will accept 10º before actuating, it sounds to me that some kind of controlled slip will do the trick, hope you find the answer

Good luck

SACEM1

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