I am trying to use my CNC mill to make profile cutters for cutting special shape grooves in the edge of steel discs. I'm using 1/4" square tool blanks.
I've tried using a small grinding stone in my high speed spindle adapter. I've also tried a carbide burr in the same spindle. In both cases, I get excessive heating. The spindle operates at 28,000 RPM. The stone is about one inch in diameter. The burr is about 3/16" in diameter. I've tried feed rates of about 20 mm per minute, depths of about .02mm per pass with the stone and .05mm per pass with the cutter.
The cutter profile has only convex curves.
I only need to make about 3 or 4 grooves per cutter.
Anyone out there with some experience in this?