Ball Mills - 911 MetallurgistDec 23, 2017 . Grinding Mill TYPE B Built with shell double welded into one of the steel heads and with the other edge double welded to steel flange which is bolted to .. All pinions are properly bored, key-seated, and pressed onto the steel countershaft, which is oversize and properly keyseated for the pinion and drive.b oll mill doble drive,Pulverizers - Pulva | Pulverize. Crush. Mill. Reduce.The Model B mill is equipped with a variable speed feed drive and is generally furnished complete with motors, starters, wiring and ready for operation. Recommended for use with main drive motors ranging from 10 HP to 25 HP, depending on the material being ground. The standard feed arrangement is dual feed screws of.