Thanks! That means a lot coming from someone who has done as much machining as you have. I am constantly amazed by what you achieve on your G0704.
By coincidence, I had downloaded that TTS manual the night before you posted this. But somehow I had skipped over the part where they discussed grinding the collet.
I don't have any decent carbide insert lathe tools as all that I have are cheapos from Banggood. But what the heck, let's give it a go. I centered up the lathe tool as best I could with a wiggler.
Then I ran the calculations for RPM and feed. The results were surprising, at least to me. Using a Surface Speed of 100 and a diameter of 1.25" yielded an RPM of 320. This RPM and a 0.001" chipload per tooth per revolution gave a feed of 0.32" per minute. Wow, much slower than I would have guessed.
Here is the first pass. Looking halfway decent so far.
I took 0.015" on each pass. This was the last pass. These passes in the mill left some really nasty burrs, especially on the interior diameter. The collet now has the correct stickout so that the new Tormach TTS tool holders will work.
And here is the finished Novakon collet. I ended up doing the chamfers in my G0602 lathe. My Banggood insert lathe tools didn't have very much clearance for the ID chamfer, so in desperation I tried chamfering with my HSS lathe tool. To my surprise the HSS cut the Novakon collet like butter. Very hard butter.
I decided to take one of my no-name 3/4" collets and make a TTS collet adapter for my G0704 mill. This did not go nearly as well as the Novakon collet.
Evidently the no-name collet was harder than the Novakon collet. I ended up destroying two carbide inserts getting it to this point. And I still have some small ID burrs. Whereas I was able to cut chamfers on the Novakon collet with HSS, this no-name collet chewed up my HSS tools for lunch.
Next step is to setup the TTS holders with some tools, measure them on the surface plate, and enter the tool offsets into UCCNC. And then I have to measure my coolant pump flow rate for CL_MotoTech.