Quote:
Originally Posted by DampRobot
8000 is extremely fast for tools in the 1/4" or 1/2" range, in my experience. With coolant, I believe we typically set 1/4" two flute cutters at 2000 rpm or so in 1/4" aluminium at a feed rate of about 5 ipm. Our mill only goes to 3600 rpm, and we only really use it that high for very small tooling.
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A 1/4" diameter carbide end mill under ideal conditions wants to be run between 12,000 and 36,000 RPM (750-2000 SFM).
At 2000 RPM you're at 125 SFM which is fine for HSS but doesn't take advantage of carbide's benefits.