Re: 316 stainless


<tlipton2@xxxxxxxxxxx> wrote in message
news:1126064109.150256.51570@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Excellent analysis KG.
>
> So many times as machinists we slow things down when we have a problem
> when sometimes speeding things up is what is needed.
>
> I'm no expert I have learned most of what I know by screwing up. The
> only thing I claim is that I paid attention when I did screw up.
>
> With that said it might make more sense to abandon the M geometry which
> is a medium general purpose chip breaking style and go to a more
> roughing grade or even a wiper roughing geometry.
>
> Tom Lipton

Yep,
I had a machinist 'prove' to me that we couldn't go any faster, by gently
turning up the feed rate, and getting lots of chatter. A week later I
accidentally ran the same program and three times the spindle speed and four
times the feed rate. Oh Shit! Hey, wait a minute, where did all that metal
go? Four times faster by mistake. The tool lasted twice as long too. That
was aluminum, but I had a very similar thing happen on cold rolled steel. I
broke 4 end mills in quick succession, then finished the job on the last end
mill in a quarter the time I was told the job would take.

Gary H. Lucas


.

Relevant Pages