Karl Townsend wrote:

I started grinding a little tit on the end of a cutoff HSS tool.

Take a 1/4" HSS blank, why? Less to grind. Grind a vee relief to clear the radius of the
groove. You will be fine.

I wish I could show you a picture of our stacked groovers we use to cut tightly spaced
grooves in rotors. Cutting 8 grooves at a time in aluminum will take a 15 hp spindle to
the edge and poly microvee belts suck compared to rubber. One will slip and melt, the
other will grip and stop the spindle motor.

Wes