I was talking to a German fellow the other day who has spent many years running CNC's. He is currently working for a company which has a Weeke CNC, and he was telling me that he runs a triple flute compression bit at 24000 rpm with a travel speed of 25 meters/min. He said it cuts like butter. I was thinking of giving it a try, but was wondering what others thought or how many are doing this.
From contributor I:
25 meters per minutes translates to about 985 inches per minute. It might be possible depending on the tool geometry. There are tooling vendors out there that have claimed even higher possible cutting rates. When evaluating a claim of cutting speeds, one has to determine if the speed being referred to is programmed speed or actual achieved speed.
Depending on the part sizes and the acceleration/deceleration rates of the machine, the programmed speed may be rarely or never actually achieved. A couple of sheets of nested drawer box parts may cut fine, whereas a couple of pantry gables could burn your tool out.
This is the actual cutting speed achieved. I can watch the feed speed as it is cutting and it drops for a very short period at corners. The ramp up speed (acceleration) on my machine is fast, the tech who installed it actually slowed it down he said I didn't need it so fast. I have a three flute I am waiting to try and will start cutting with it over 30 m/min. It's so fast I needed to hire guys just to keep up with its output. It runs maybe 20% of the day on average.