Hosokawa/Mikro Mikro10ACMPulverizer air classifying mill (ACM). ACM passes air through the grinding chamber with a 1 hp classifier. This unit is a model 10ACM and it is constructed of carbon steel. Serial number 9434CI. ACM is driven by a 10 hp 230/460 vac 3 phase main motor and a .75 hp 208230/460 vac 3 phase feeder motor.