I have a question about machining a shaft down to a diameter, sometimes I get a finish that's baby butt smooth, and sometime it's a little gritty, no matter how deep or shallow of a finishing cut. I use Tap magic cutting fluid and the carbide tip as shown. Should the cutter be dead parallel or slightly kicked in?
I got the Patriot dialed in so I can cut a diameter from the DRO measurement and the part matches exactly to the accuracy of my digital calipers. (after a final final pass). The inital finishing pass leaves the part about 0.001" oversized, and a second cut gets it right on the money. When writting a CNC program, how do you compensate for tool flex? Do you take a couple of redundant passes? Or, maybe I shouldn't be so anal, I'm not making dowel pins