Need help reducing shaft diameter

[Mark Sheridan]

You can try loading the shaft into a hand drill chuck, spin the shaft while cupping the part with sand paper. Let the hand drill do the hard work. Go slow and keep checking the OD. also keep cleaning out the sand paper, your gonna get a lot of aluminum dust. It will take a while but its a low cost fix. I had to do this with a aluminum shafts a couple years ago. Make sure you got a fine grit sand paper too.

Also get in touch with 100 or 766 in your area. They should be able to help with this too.