I have a part that I'm running on a haas lathe. We start with 10mm blanks ~.393". I then have to turn the first 2 inches of the part to .25"...

Right now I'm using a roughing tool with a CNMG432 insert. I'm taking one rough cut at ~ 1600 rpm and .01 feed leaving about .007" for the finish tool. I take two passes with the finish tool - one cut to size and another spring cut. The tolerance on this part is +-.0003". Finish tool is cutting ~1600 rpm at .005 feed CNMG431 insert.

The roughing tool lasts for about 100 parts which is good enough for us. The finish tool lasts forever since its taking a small cut.

The issue that I'm having is that I'm not getting a good finish on the parts. I'm not sure if they are deflecting or work hardening from the roughing pass. I'm using flood coolant so i don't think it is heating up too much... Should I change my feeds/speeds?