- Conical wet grinding ball mill - Mill and drive mounted on steel skid - Straight gears - 3-piece shell - 2-piece ring gear - Scoop feeder - Steel liners - 2-3 inch used ball charge Direct drive with motor and g... USA Trusted Seller 6 x 14 ft (1.8 x 4.3 m) Allis Chalmers ball mill with 250 HP Manufacturer: Allis-Chalmers