Has anyone tried this method of parting off? I've recently trialled it, and got very favourable results. Really nice parting blade with coolant being applied both over and under the insert. I ran a feedrate twice what I would normally run, and it cut well, with a better finish than normal. The only drawback is our U3000 doesn't have constant surface speed on the Y axis, and no amount of cheating managed to get it to do so (I did try coordinate rotation but it was a no go)