Quote:
Originally Posted by Richard Wallace
I have ordered some pulleys to try this, along with aluminum tube and bronze bearings. Tube and bearing part numbers from McMaster-Carr are 9056K28 and 6338K465, respectively. I plan to turn the tube O.D. for a tight fit to the pulley bore, then bore (drill) it to a tight fit for the 5/8" bearing O.D., and face to 2.175" long. After a light press to fit the tube into the pulley, the bearings can be inserted and then the assembly should replace a damaged one. I don't know how much extra friction the sleeve bearings will add, relative to the 1416ZZ ball bearings -- current draw will tell that tale. If this approach works it might be used to repair damaged pulleys.
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The only issue that I see, looking at the drawing for the pulleys is that the center bore is
relatively loosely held at .95-.97. You may want to open the pulley bore slightly to prevent the need for matched sets of tubes and pulleys to get the desired light press fit.