Stonecrusher
Active Member
I have cut wood everywhere from a couple hundred to 15,000 RPM and it seems that as long as you can evacuate the chips you can feed as fast as you can. Granted a Bridgeport is different from a CNC mill because you can push the feeds WAY up with accuracy. When you want a real good feedrate and finsh the high helix carbide end mills for aluminum and plastics is the cat's tookus. The high RPM's literally throw the chips off the top of the cabinet inside.
In specialty applications a special ground high speed tool will deliver an excellent finish in plastics and wood. If you break the edge with a stone Very slightly it will give a wiper effect and the finish is superb. This works especially well on the corners of an end mill when you are cutting with the bottom. This is one reason why we still emply a Cutter Grinder Department where I work. Definitely old school, but it works.
In specialty applications a special ground high speed tool will deliver an excellent finish in plastics and wood. If you break the edge with a stone Very slightly it will give a wiper effect and the finish is superb. This works especially well on the corners of an end mill when you are cutting with the bottom. This is one reason why we still emply a Cutter Grinder Department where I work. Definitely old school, but it works.