Re: [CAD_CAM_EDM_DRO] cutting speed and feed for 3/4" dovetail cutter

marble here wrote:

> Sorry all yes I have milled out the pocket first and
> the steel is D2 tool steel only one part is so I
> thought I should get that done first and the cutter is
> a 3/4 "8 flute

Oh, well the D2 is why you are having a problem. You might try increasing
the speed a little, and the feed a bit more than that, to get a good .001 - .002"
per tooth, at least. What is the shank diameter?

You may have to get a stronger tool, either M-42 or some other Cobalt HSS,
or go all the way to carbide. Yes, I know, a carbide tool will be REALLY
expensive.

You might try to analyze the failed tool to determine why it broke. Look at the
cutting edge under bright light, with a strong magnifier. See if the edge is worn
or chipped. I'm guessing the cutter wore out first, then broke due to increased
cutting forces.

Jon