01-14-2015, 10:35 AM
(01-14-2015, 08:12 AM)PixMan Wrote: Nowhere near proper speeds for a 1/32" (0,8mm) carbide end mill, but I got the pack of 5 for less than one good HSS end mill.
When I used one of them recently I had the rpm up at top end and was very surprised that I didn't break the end mill going that slow. It actually cut pretty nice.
That is what I was curious about. From what I have read in the past, if you aren't running a bazillion rpm and a consistent micro feed rate, it's sure death for a carbide tool that small. Just how slow of a feed can you get on your mill?
I was just wondering how you managed to pull it off. I've tried it myself in the past. Of course I don't have anywhere near the mill you do, and the instant the tool lightly touched the part it snapped off like a strand of glass thread. Which was just what I expected to happen honestly. So what is your secret to success if I may ask?
..... DOH! It just occurred to me you have a CNC setup. Never mind.
Move along folks, these aren't the droids you are looking for....
I have been toying with the idea of getting the speed increasing hand piece (35,000 rpm) for one my Foredom tools and mounting it to the quill of my mill and giving that a try. I would still have a problem with the feed rate, but thinking I may be able to get away with something like "chain drilling" a slot first then going at a finish pass? I dunno....
Willie