Thread a .708" OD barrel?

DE Shooter · October 4, 2009, 10:46 AM

I have a 7.62x39 rifle with a .708" OD barrel. I would like to thread it to rcv various AK or AR muzzle devices....AK preferred. Is there a die available for this OD...24mm RH preferred. I have several different stocks but would need a bore guide.

brickeyee · October 4, 2009, 11:15 AM

Large diameter precision threading is best done on a lathe.

DE Shooter · October 4, 2009, 01:45 PM

Well I don't have a lathe available...if I did I would mill the barrel to a standard size and buy or rent a kit. I'd like to try and thread it myself to start the learning curve...always wanted to try. I stay with the tried and true for life on the line, SHTF pieces...this isn't one of them.

Harry Bonar · October 5, 2009, 08:29 AM

Sir;
I think there are dies made for this. However, your muzzle must corespond to the "major diameter" of the thread selected.
Getting that die started straight is important - a square, or die stock with a centering device would work also.
The barrel must go through the headstock of the lathe to thread it properly.
Harry B.

flyguy958 · October 5, 2009, 07:42 PM

Your barrel is smaller than 18mm, hard to get 24mm threads. I agree with brickeyee, threading a barrel without a lathe is almost impossible to get proper alignment.

If you want to learn more about machining buy a Machinist Handbook. Practice on scrap so you don't make scrap out of you barrel.

When I thread barrels I do not put then through the headstock. I use a plug for the breach and muzzle and run it between centers.

October 4, 2009, 10:46 AM	#1
DE Shooter Senior Member Join Date: January 20, 2009 Posts: 215	Thread a .708" OD barrel? I have a 7.62x39 rifle with a .708" OD barrel. I would like to thread it to rcv various AK or AR muzzle devices....AK preferred. Is there a die available for this OD...24mm RH preferred. I have several different stocks but would need a bore guide.

October 4, 2009, 01:45 PM	#3
DE Shooter Senior Member Join Date: January 20, 2009 Posts: 215	no lathe Well I don't have a lathe available...if I did I would mill the barrel to a standard size and buy or rent a kit. I'd like to try and thread it myself to start the learning curve...always wanted to try. I stay with the tried and true for life on the line, SHTF pieces...this isn't one of them.

October 5, 2009, 08:29 AM	#4
Harry Bonar Senior Member Join Date: December 5, 2004 Location: In the Vincent, Ohio general area. Posts: 1,804	die Sir; I think there are dies made for this. However, your muzzle must corespond to the "major diameter" of the thread selected. Getting that die started straight is important - a square, or die stock with a centering device would work also. The barrel must go through the headstock of the lathe to thread it properly. Harry B.

October 4, 2009, 11:15 AM	#2
brickeyee Senior Member Join Date: December 29, 2004 Posts: 3,351	Large diameter precision threading is best done on a lathe.

October 5, 2009, 07:42 PM	#5
flyguy958 Senior Member Join Date: June 27, 2009 Location: SC Posts: 200	Your barrel is smaller than 18mm, hard to get 24mm threads. I agree with brickeyee, threading a barrel without a lathe is almost impossible to get proper alignment. If you want to learn more about machining buy a Machinist Handbook. Practice on scrap so you don't make scrap out of you barrel. When I thread barrels I do not put then through the headstock. I use a plug for the breach and muzzle and run it between centers.