This is a a quick review of a "Do It Yourself" bench grinder/buffer mandrel for the garage tinkerer, by Chicago Die Casting Buffing mandrel #330 and #440. I remember seeing a similar setup in my grandfathers garage when I was a kid hooked up to a small ac motor (that he probably took out of a washer or refrigerator), powering a grinding stone and wire wheel. Unlike Harbor Freight grinders these are completely rebuildable and Built in the USA.
Cheap fix for broken pulley on Delta DP350, replaced with Chicago Die Cast pulley, bored out to .589 inch. Eliminated variable speed, but permanent fix for $12.99.