Stock # 19490 | Capacity 800 HP. Used 800 HP Allis Chalmers 10ft x 14ft (3m x 4.3m) Ball Mill. 2-pc Helical Bull Gear, 13' diameter, 16" Wide Face, 310-Teeth. Helical Pinion Gear, 16" Wide Face, 19-Teeth. Rubber Liners, approximately 60% life remaining. Trunnions in Good Condition. Babbitt Bearings.