Drilling .09 thk SS

[Machine1]

its 304 SS

[Machine1]

Originally posted by hardmill I'd bump to about 60 sfm .002 chip load and increase your peck. Way too much engage/disengage going on. jm2c What kind of stainless is it? PEACE

It is 304SS...I tried these numbers and after the 3rd hole the drill burnt up. They are center drilling the hole and the tip is breaking thru 3 of the plates. Then we are coming back in with the drill. Would that have any affect of the drill? Maybe that is what is causing the drill to burn up on the corners...all the vibration that it is getting going into the hole that is C'drill. Maybe we should spot drill it? Im a little frustrated with this job. What do you think about a Carbide drill?

[HuFlungDung]

I'd try a high helix HSS cobalt drill before I'd try carbide, unless there is a proven coating that will prevent cratering. I'd like to know, too, if such things exist, that are successful in use in the real world.

Also, no pilot hole, maybe just a spot would be a good choice, too.

[Machine1]

I was using a Cobalt to start out with. I think that I am going to try to run a spot drill instead of a center drill.

[Machine1]

Originally posted by Machine1 Where did you get the CNCSpeed software? Did you download it off of the net

Nevermind I found it. Thanks

[HuFlungDung]

Dormer Tools series A108 fast spiral for autenitic stainless steels is the actual drills that I use for stainless. I believe these are a cobalt alloy, too, at least they look like it You still cannot overspeed these drills, but they do drill nice and smooth.