Hello, yes I am from outside the US. Since I knew it would be a pain getting the correct thread cut, I thought I'd just go with a metric one. The reason for a left-handed thread, in my head, was that it would be impossible to clean up the existing one due to the epoxy, so I thought, that cutting a left-handed one would make for a better joint, compared to weakening the existing one with a new right-handed cut, which would have a 99% chance of not lining up with the already existing thread groove.
The shaft is currently at 12.50 mm exactly, not a 0.01 mm over or under.
So, since English is not my native language, I would like to ask: what exactly is a tenon? Is it a piece of wood that gets plugged into the shaft, and gets the thread cut on it? Because before making this post, I assumed it was the shaft itself that had the ferrule thread cut onto it.
Since I only have access to a lathe, I was thinking of using a hand-cutting die and supporting it with the tailstock of the lathe. Would this not suffice? It would be pretty much perfectly perpendicular and concentric to the shaft.
I guess I only have 3 questions left for this thread, if I can pick your heads a little more:
1) Which thread cutting die do you recommend I get?
2) How do I start cutting the thread exactly where the old one was? Will I even be able to see it? From the answers above, I am guessing if I make many shallow passes with the lathe, that I can manage to locate the thread, and then just position the die on the shaft accordingly?
3) What is the difference between tomahawk, NX and Juma ferrules? How does it feel differently play-wise? Which gets the least dirty with chalk?
I assume that all of these ferrules are some proprietary plastic blend, so looking up technical data such as the Young's modulus would probably not be fruitful.
Thank you all for your replies, you guys are great. An amazing forum.