Angle grinder for high speed bits on a CNC Bridgeport?

I'm thinking of a way to use small cutters (for engraving or routing)
on the CNC Bridgeport 2J head I'm toying with. I think an air
powered angle die grinder dosn't have enough torque. Anyone try
adapting an angle grinder? Any idea how to addapt a 1/4" collet
holder to the "nose" and aligne it acurately with the spindle? Will
it keep its accuarcy?
Maybe I can afix an NTMB 30 head to it using a collet holder for
mounting into the spindle?

Any other ideas?

Thanks and regards,
Jeff