Originally Posted by riverrat  2.5 od on aluminum, i'm gonna say go waaaaaay more rpms, probably max.
as far as feed on the od turn, assuming no crazy finish callout, .01 per rev
even with a big depth of cut should give a pretty good finish.
just remember aluminum is a soft material, in order to break a chip, it
has to be pretty thick, .01 per rev is pretty conservative considering
i'm not sure of your machine, rigidity, etc.
hope this helps |
Well max RPM's is 3000 but it's got a gigantic chuck on there that I dont like to spin more than 2500
The machine is plenty rigid, it's an Okuma LC-40 with a 60hp spindle motor. All the turning holders are 1.25" and I am holding the part in machined soft jaws.
I will try cranking up the speed to max and going with 0.01IPR and work up from there instead of 0.005.
At least I know .005 gives a beautiful finish for the finishing passes at 5thou DOC. I'll keep pushing and see how I do