دنفر الكرة المطاحن,denver ball mill, 3' x 5', 25 hp, on skid - s734750.wmv .aug 9, 2011 . denver ball mill, 3' diameter x 5' long. complete with 25 hp, 870 rpm, 3ph, 60hz, 220/440v, electric motor through gear reducer, pinion and two piece ring gear. can be used as ball or rod mill.