Re: [CAD_CAM_EDM_DRO] Milling HSS

Paul Corner wrote:

> Hi All
>
> A friend - perhaps that should be spelt fiend - has asked if I can
> mill some
> cutting tips out of 5% cobolt HSS for a wood turning tool....
> Without resorting to EDM or grinding, I'm not sure whether this is
> worth
> trying. Has anyone on this list tried machining HSS, if so, what feed
> and
> speeds, cutter types etc....
> Loathed to trash an expensive cutter, hence I ask first.

I wouldn't use anything less than a carbide cutter. You need to anneal
the
HSS tool, although you can't do that to M42 and similar high cobalt
tools.
Grinding is a good way to shape these materials. I can't understand why

you can't grind it. That is the way these things are normally made.

Jon