Lathe Cutting Tool for O-ring Grooves (and trepanning)

[PJs]

Thanks Paul! Your grind work is beautiful and the radii...Wow! Never heard of the tool material but took a look at Crucible's site. Lots of tungsten (18%) and seems to have a balanced all around toughness, hardness and abrasion resistance at 64-66HRC. Did you have to grind it with diamond or special stone and are they good for particular metals? Can't see much of a rake (clearance angle) to it? Thanks for the tip on these!

Looks like your 4 jaw was about maxed out on that plate but the finish looked great from what I could see!! Made a custom trepan/o-ring cutter out of a P1 cuttoff blade a while back to use on acrylic. The thin undersection of the P1 worked great for cooling from the hot plastic...slow to work but did fine with it. Thanks for sharing your great work! ~PJ