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Wrong.

I don't pretend to be any sort of "precision" engineer but that makes me wince. :(

They art actually cutting threads on the barrel, juse cutting an edge so the die can start threading more easily (much like if I want to cut my threads on a rod, I'd file a small chamfer on it first

poll007 wrote:They art actually cutting threads on the barrel, juse cutting an edge so the die can start threading more easily (much like if I want to cut my threads on a rod, I'd file a small chamfer on it first

It's more than just a chamfer - they are 'turning' down the barrel to the major diameter of the thread, prior to threading with a hand die. The full video would have another 15 mins of butchery with that horrible tool before they could start cutting the thread.

..

rox wrote:

poll007 wrote:They art actually cutting threads on the barrel, juse cutting an edge so the die can start threading more easily (much like if I want to cut my threads on a rod, I'd file a small chamfer on it first

It's more than just a chamfer - they are 'turning' down the barrel to the major diameter of the thread, prior to threading with a hand die. The full video would have another 15 mins of butchery with that horrible tool before they could start cutting the thread.

..

Correct me if wrong but wouldn't the major diameter be .625 for the threading, which from what i can recall is actually larger than the diameter of a mosin muzzle (I'm sure I've seen a finish mosin at one point get cut 5/8x24 without turning first)

poll007 wrote:

rox wrote:

poll007 wrote:They art actually cutting threads on the barrel, juse cutting an edge so the die can start threading more easily (much like if I want to cut my threads on a rod, I'd file a small chamfer on it first

It's more than just a chamfer - they are 'turning' down the barrel to the major diameter of the thread, prior to threading with a hand die. The full video would have another 15 mins of butchery with that horrible tool before they could start cutting the thread.

..

Correct me if wrong but wouldn't the major diameter be .625 for the threading, which from what i can recall is actually larger than the diameter of a mosin muzzle (I'm sure I've seen a finish mosin at one point get cut 5/8x24 without turning first)

I don't know the dimensions of that particular barrel, but it looks like he's doing this:





as described here:

https://gunsmithtalk.wordpress.com/2013 ... t-a-lathe/

and shown here:

https://www.youtube.com/watch?v=zY95wVA9s9U

..

you certainly seem to be right (i must of seen it done on a different sized barrel, not unusual as there's several variants for the mosin)
at least they seem to have secured it better than in the video link you posted

That is just wrong on so many levels.
Yee-hawwwww.

OMG!