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One note on that- if it seems easy to find, it has not been. Most motors that can provide enough power are more than 2.5" long; so far I have only found one acceptable motor, from a company called Crouzet.

Yes, the problem was stall/not enough power (not spinning at all). I may have to deal with the friction transmission once the motor is powerful enough; it is not yet a problem. After measurements and simple calculations, I now know I need 0.75 Ft lb of torque, 60 rpm, and .009 HP (via the...

Thank you so much for your suggestions. In the end, my calculations gave me a ballpark figure, but I decided to rig something up to actually measure the force required and calculate from there. Thanks again, Steve

Hi, I feel silly but I am completely stumped by this. Here is the situation: I have a motor shaft attached to a disk coated in rubber, friction-turning an adjacent larger cylinder. Both are pointed vertically. A load is balanced directly on top of the cylinder and is being spun (not lifted) by...