Re: Chuck Jaw Issues Unimat Selecta
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G'Day!
I am using tungsten carbide cutters, on all of my lathes, including the D-bed Lorch (which is as flimsy as they get) without any trouble. Of course I do not use Chinese TC cutters, I make my own from broken TC centre drills or from the broken solid carbide drill bits 1/8" in diameter, I made several holders out of key steel holding TC bits in with a 3 mm set screws. The TC bits I grind with diamond wheels in my tool and cutter grinder. Had no problems whatsoever, cutting hardened and tempered steel like butter. The HSS cutters I use mainly for brass and other non ferrous alloys and metals, sometimes I use HSS cutters with addition of cobalt on some steel parts.
Cheers, Dushan
You say you are using cheap carbide tools, are they the brazed tip type that are color coded?
I find them to be pretty bad. They just aren't sharp enough. For small lathes the cutters need to be razor sharp. Better with HSS or ccgt type indexable tips. Blunt cutters will rub rather than cut, you should check they are on centreline too. This could be your problem.?
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