Quote:
Originally Posted by MrForbes
We're planning to support weight with a 2" to 3" diameter tube, riding in some sort of plain bearing (bushing), are we doing something wrong?
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Is the bushing itself going to be 2-3" ID? McMaster's rating for a 1" ID, 1" long Delrin bearing is 400lbs @ 25 rpm. Bronze bearings will have much higher ratings. So you definitely don't have to worry about too much load. You may have to be careful about the speed rating, though. Too fast and too much load can cause galling and extremely rapid failure. You should be able to find max P(ressure), V(elocity) and PV values for any bearing you get, and calculate out what your actual values for that are.