Hi guys, hoping someone can lead me in the right direction here. I can't seem to get a good finish using the negative top rake indexable carbide tool holder I just got. I have played around with feeds and speeds and depth of cut and the finish is alway rough. Note this is on 2" dia CRS. I have a 13 x 40 lathe. The cemeted carbide tools were doing ok. The insert is C6 TIN coated. Appreciate any feed back to help clear this up.