The Haas VF-2 is a vertical machining center with a 20 horsepower spindle motor and a maximum rating of 30 HP. It has a spindle speed of 7,500 rpm and a maximum speed of 8,100 rpm. 

For a 20 HP Spindle Motor on a VF- 2 VMC the required phase converter to use is a GP40NL - 40 HP Rotary Phase Converter from Phoenix Phase Converters.