Myford Mg12 Internal Grinder Coolant Pump Capable of doing Taper Grinding. Related Listings. Used 1999 MYFORD MG12 HPM in Prospect Heights, IL. ... cylindrical grinder SOLD Myford MG12-HPM cylindrical grinder, new in 1999. With possible exception of the later CNC models, the HPM was Myford's finest model, with the most features. ...