Allis Chalmers Ball Mill Parts rt. allis chalmers ball mill parts. ball mill, diameter long, manufactured by allis chalmers rubber-lined mill, with siemens-allis 2,000 hp, 4000 volt, 200 rpm synchronous motor, eaton airflex clutch. includes trommel discharge, ball mill rejects conveyor, lube system, etc. offered complete with controls. new in 1979. completely rebuilt in 1998, serial number