A big downside of using a repurposed treadmill motor is that they don't have a nice, standard, flat mounting plate. I think I was lucky in that I didn't have to do anything very fancy to create a new mount. The flat right-angle pieces are 6" corner braces from Home Depot. I was able to drill exactly matching holes through them by drilling them together using a drill press. The adjustment range for the shaft height is almost 2".

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image: Wed 10 Dec 2014 04:51:55 PM