i often put the hub in the lathe when replacing the bearing.
the hub will have hot spots so it hard to machine.most of the time they are out of square.
ive had problems with these slipping when ive made one up-miss matched patterns- from two compressors.they often dont bed in.
you often see this in hot weather when the compressor starts with a high head pressure.
im not going to say ive hit these with the grinder when spinning as that would be dangerous.![]()



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