I have been using for years a 56c frame swimming pool pump motor.
They have a 5/8 shaft with either a mount underneith or a flat face with four tapped holes for mounting. The best part is: they turn 3450 rpm! All you need to get is one of those slide on 1/2 inch threaded mandrels that will go on a 5/8 ths shaft. They usually have two set screws that tighten down to hold it on the shaft. You can put sanding wheels, polishing wheels or anything for that matter that won't explode at 3450. This set up is cheap and at 3450 rpm works bitchin. Get a couple of sticks of polishing compound like black emory or the green stuff, wet sand your parts, put the stick to the wheel for a second then get to polishing.
They have a 5/8 shaft with either a mount underneith or a flat face with four tapped holes for mounting. The best part is: they turn 3450 rpm! All you need to get is one of those slide on 1/2 inch threaded mandrels that will go on a 5/8 ths shaft. They usually have two set screws that tighten down to hold it on the shaft. You can put sanding wheels, polishing wheels or anything for that matter that won't explode at 3450. This set up is cheap and at 3450 rpm works bitchin. Get a couple of sticks of polishing compound like black emory or the green stuff, wet sand your parts, put the stick to the wheel for a second then get to polishing.