Quote Originally Posted by newcastle View Post
What is the thread on a No.1 barrel anyway? The smith had done it before so he knew andha dteh stuff needed. I assume the threading can't be done by hand?
There is a slight difference between a No1 and No4 barrel, think Bruce in Oz had a few drawings ? 1" x 14 TPI whitworth (55 degree thread angle) I say an inch but think its around .997"
If you follow the steps in the link I posted you can't go wrong, just remember the pictures don't show the tail stock with the revolving centre. (practise makes perfect)