Used Abbe Engineering Ball Mill, porcelain lined chamber. 18" diameter x 16" long. Approximate 18 gallon (2 cubic foot) capacity. 61/2" charge/discharge port with clamp down cover. Driven by a 1/2 hp, 3/60/208220/440 volt, 1725/1425 rpm gearmotor. Mounted on 24" high carbon steel stands on a carbon steel Ibeam base.