- This unit is in very good condition and is powered by a 125 HP electric motor - 2/WV-belt to drive torque clutch - Air discharge - 24 mounted grinder blades - Screens - Knife hog infeed chute - Rotor - Internal fly wheel - 72" x 52" feed hopper - The Williams Knife Hog can handle the rough applications such as whole tires to 1" PCF, wire, cable, electronic scrap for metal recovery and plastics for recycling.