Their inventory and customer service has ensured successful project results every time. Thanks y'all!" ... Used- Hardinge Conical Ball Mill, 9' x 11'. 300 hp Westinghouse motor, 550V, 1800 rpm, 3 ph, 60 hz. Included are shell, heads, bull gear, bull gear cover, pinion, trunnions, bearings, skid stand and motor. ...Web