05-31-2015, 07:15 AM
Hi Ron, welcome.
I would say the two are the same system tools. Iscar had introduced those GTx (GTL/GTR/GTN) style parting inserts and blades in the 1970's or so. Since the patent has long expired and they had such and extensive market, other makers went after it.
You are correct that the chipbreaker (top form geometry) is what varies between the different manufacturers. The PTNT02 is the "general purpose" heavy feed rate parting geometry for plowing through to cutoff solid work. The biggest mistake people make with that one is not giving it enough feed. If you look at the GTN 3 NAC35A version, that's a more positive geometry that will work at lower feed rates and leave a smaller burr. I didn't see it offered in 2mm or 2.1mm wide.
That said there are newer, better products out there today if you want performance over cost alone. Other parting systems won't come as cheap, but do secure the insert against a positive stop in the blade or monoblock holder, and offer premium carbide. You get what you pay for....except in AUS. Man, you guys get taken to the cleaners on tooling there for anything other than cheap (Asian) import crap.
Good luck!
I would say the two are the same system tools. Iscar had introduced those GTx (GTL/GTR/GTN) style parting inserts and blades in the 1970's or so. Since the patent has long expired and they had such and extensive market, other makers went after it.
You are correct that the chipbreaker (top form geometry) is what varies between the different manufacturers. The PTNT02 is the "general purpose" heavy feed rate parting geometry for plowing through to cutoff solid work. The biggest mistake people make with that one is not giving it enough feed. If you look at the GTN 3 NAC35A version, that's a more positive geometry that will work at lower feed rates and leave a smaller burr. I didn't see it offered in 2mm or 2.1mm wide.
That said there are newer, better products out there today if you want performance over cost alone. Other parting systems won't come as cheap, but do secure the insert against a positive stop in the blade or monoblock holder, and offer premium carbide. You get what you pay for....except in AUS. Man, you guys get taken to the cleaners on tooling there for anything other than cheap (Asian) import crap.
Good luck!