Sep 02, 2020 · I am still working on my KMG belt grinder clone and now I'm wandering "at what speed I want my belt to run?". I have no money to buy a variable speed device so I'll go on 3 or 5 steps pulleys. I'm trying to find step pulleys to obtain more or less 280 m/min (920 ft/min) on the middle pulley. The other speeds will follow.