(no longer available) or this Substitute #22 hand meat grinder, to a compact, (1/4 HP) motorized grinder. It grinds at the rate of five (5) pounds a minute, hour after hour, and, because of the ball-bearing speed brake, it is very quiet and vibrationless. The speed brake reduces the motor speed of 1,725 rpm to a grinder speed of about 75 rpm. The base is 1" press board, so that the platform will not "flex" during operation, thus preventing belt slippage. The V-belts are tensioned not too tight, however, so that they will slip if you hit a chunk of bone, instead of breaking a grinder part — the motor mount is slotted, and the main base beneath the grinder mounts is slotted, allowing them to slide for proper V-belt tensioning.
The American Tool grinder comes with a 3L & O-Section, 10" flywheel — The design below uses 1/4 hp,1725 RPM motor and a speed break. It's a machine that should last 100 years.
