I need a motor pulley for my PM72. Unfortunately, this is proving to be slightly more difficult than I anticipated. I need a 4 v belt pulley with 3” outside diameter, 7/8” bore, and 1.75” wide. All I seem to find are pulleys with indeterminate bores. They don’t spec out the total width either.

https://m.grainger.com/mobile/produc...parentimage%24

is this typical? I’m guessing I can get a bushing to get the bore to fit 7/8, but how do I ensure it’s properly sized to fit the shaft key. This also seems a little janky. Anyone have a better source?