As the title states, my CNC knee mill has a 1987, 3HP, 3ph, Taiwan sourced spindle motor. This motor has E class insulation. Will my motor self destruct since its not F rated for inverter duty if I run it on a VFD?

Click image for larger version. 

Name:	IMG_20140421_170301823.jpg 
Views:	3 
Size:	97.1 KB 
ID:	510381