Normally, I'm pretty good at estimating RPM rates... This one has me a bit worried that I might get it wrong.
The customer eventually will be using a 1.0" diameter HSS end mill to make a "hole" in aluminum - no coolant.
The surface finish is not critical, but making sure it at least works is.
The tool will enter the part at a 45 degree angle to the surface to make an "oval" hole if you will.
I'm thinking 400 RPM but would take any suggestions you may have.
The unit driving the tooling is about 150 lbs. total and has 3 HP so it's not a monster. It does, however produce up to 1000 lbs. of thrust so the tool shouldn't bounce around too badly. It's a thru hole for clearance on a big rig frame part so being "pretty" isn't as important as being long-term reliable.
Regards, Joe Agro, Jr. (800) 871-5022
01.908.542.0244 Automatic / Pneumatic Drills: