grind down your blade with ease using a grinding machine! these machines use sandpaper belts and high speed to quickly remove steel, handle, or other materials from your knife project. ... Kalamazoo 21" x 48" Belt Grinder 1/2 HP motor, 1PH, 110v or 220v. 8"x2" 70 duro contact wheel. The high 7200 surface speed allows for quick metal removal ...