· Posted February 12, 2011. I have for sale a KMG belt grinder. It takes 72" belts and has the platen, steel base, 1 1/2 hp motor with on off switch, small wheel attachment, and two adjustable speed pulleys. This machine was used by me in my mobile sharpening truck. I cannot imagine that I used it more than ten minutes a week for maybe 6 or 7 months.