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I have a few electric motors in commercial dryers with warn keyways on
the shaft end that holds the fan any suggestions on how to repair.
Keyways are 1/8 in. Thanks Martin

Get a Climax shaft keyway cutter and cut the keyway over size and make a
step key for it.

http://www.cpmt.com/tool_over_km.php

They show a video of it in operation.

Richard W.