For those of you using threading tools and inserts for barrel threads, whose tooling are you using. I have always ground my own lathe bits, but would like to try the inserts.

I use high speed because it cuts better at low speeds than carbide. I can't disengage fast enough with carbide. I made a holding fixture to grind the tool bits on a surface grinder. This way they are 30 degrees off the side so I only have to line it up to the barrel with a square. No more screwing around with a fish tail.

When I was in business I used Thin Bit. You can buy the hss inserts from them or grind your own.

I use this one https://www.arwarnerco.com/Kit...ader-NV-p/kit-31.htm

I use Kennametal inserts, threading upside down and backwards at around 240 rpm. Never have worry about a crash and spinning fast enough for a great finish.

I like carbide inserts for their repeatability and accuracy. I just install a new insert for the final couple thou resulting in a good finish

The upside down and backwards is pretty foolproof, but with an integral barrel, you just can't chance it due to the required tool relief
groove.

In this scenareio I grind my own HSS so I can get up real close to the shoulder and without the relief groove . You then have an easier chance of proper index.

Been grinding my own threading bits as I was taught in trade school years ago.

I use an Aloris tool that you can sharpen on your bench grinder and reset to height using the adjustment on the holder.

Aloris2 by jakefromclemson, on Flickr

Aloris1 by jakefromclemson, on Flickr

quote:

Originally posted by larry miller:
I can't disengage fast enough with carbide.

Run the tool upside-down and the lathe in reverse, cutting the thread from the shoulder back.
That way you can run at any speed you like without needing to disengage accurately.

I prefer HSS over Carbide. Ive used both and I cut threads under 350 rpm and HSS definitely works better. From my experience which is limited compared to alot of you, Carbide likes lots of speed and heavier cuts