I'm looking to find a company that will turn down a predator 314 shaft . I want it 12mm I know it's going to void the warranty but it is what I want if you know some where to have it done please let me know
12.00mm is .472". The hole in the end of the shaft is .250".
.472" - .250" = .222"
Divide that in half to get the tenon/ferrule thickness gives you .111"
Split that in half you get a tenon wall that is .0555" thick and a ferrule wall that is .0555" thick.
Not enough. Even if the ferrule wall thickness might be thick enough the tenon is not.