Just a Sparky
Hot Rolled
- Joined
- May 2, 2020
- Location
- Minnesota
TL;DR I'm sick of Chinesium Easy-Bake endmills and I'm ready to upgrade to some real cutters.
Some of what I do involves machining hot roll drops for simple projects. Making 'T'-nuts, jigs, etc. Trouble is the mill scale on some of it is remarkably hard, especially on pieces which have been flame cut. My files like to skid/glide without cutting when trying to break some of the upturned scale along the edges after milling.
For a little Burke No. 4 with a top speed of ~900RPM and not the *most* rigidity in the world, would cobalt steel do well enough for my needs? Or would carbide be worth the extra investment? I'm mainly worried about shattering carbide endmills if a good vibration happens to set up. Would irregular flutes be worth considering for spindle speeds this slow?
Some of what I do involves machining hot roll drops for simple projects. Making 'T'-nuts, jigs, etc. Trouble is the mill scale on some of it is remarkably hard, especially on pieces which have been flame cut. My files like to skid/glide without cutting when trying to break some of the upturned scale along the edges after milling.
For a little Burke No. 4 with a top speed of ~900RPM and not the *most* rigidity in the world, would cobalt steel do well enough for my needs? Or would carbide be worth the extra investment? I'm mainly worried about shattering carbide endmills if a good vibration happens to set up. Would irregular flutes be worth considering for spindle speeds this slow?