A small bench top belt grinder I made, it takes 730x25 belts, which I chose because the grits available vary from 80 to 1000. Originally the design was a three wheeler and there were two belts but the motor didn't have enough power to spin them, so I came up with this two wheel design. The motor spins at 1450 rpm, not quite fast enough for a belt grinder, so, I used a bigger pulley on the motor to speed up the belt speed a bit.