- Joined
- Jan 19, 2012
- Messages
- 177
I know that there are formulas to figure speeds and feed for milling but I was wondering if there is a chart that would show what it is needed. I am new and spending way to much time trying to figure this out. Another problem is there a difference speed between 2 and 4 flute, roughing of plain mills. What about speeds for face mills and fly cutters. Over the weekend for example I needed to cut a step in the edge of a steel plate. It is .750 deep and .250 from the edge. I started with a 5/8" roughing mill .250 from the edge and a .200 depth of cut, I tried cutting speeds from 345 to 1180 and was not climb cutting. My mill (PM 932m PDF) either it was chattering bad at lower speed or the machine was laboring. I tried some smaller mills and some larger ones both finishing and roughing with similar results. I ended up using a 3/4" end mill with 3 carbide cutters. I was .250 from the edge and started with a .100 depth of cut. The best speed was 1180 RPM and I was able to increase the depth of cut to .200. Now my project was moving along but I spent almost 2 hours before settling on the carbide tipped endmill. Any help would be appreciated.