challenger
Stainless
- Joined
- Mar 6, 2003
- Location
- Hampstead, NC-S.E. Coast
I have a small 9"X23" chinese lathe and am trying to turn/face some 3" round 4140. I am very new to this and have gotten tow here I can turn about .010 at a time-w-carbide but cannot seem to be able to turn-w-HSS tools. I try and shape/sharpen my own tool bits and shape the HSS tools-w-similar profiles as the carbide. My lathe will only go down to 125 rpm. Is this still too slow? According to a formula I got it should be about 77 RPM but man this really seems slow.