Barrel threading - on the action?

[rbernie]

I know of a gunsmith that advertises threading barrels for sporter rifles (bolt guns, mostly) for muzzle devices without removing the barrel and chucking it up on a lathe. I assume that the method used is to insert a dowel/pilot into the bore and index on that, and use a rotating cutter instead of rotating the action - correct?

How prevalent is it to thread barrels without removing them from the action, and how good of a job can be done in this fashion?

 

[triggerman770]

Barrel threading

If you are referring to threading the muzzle it can be done without removing the barrel from the receiver or using a lathe. He can use the proper size pilot and a proper size die to thread. If you are referring tp threading the chamber end, the barrel must be removed

 

[rbernie]

Sorry that I was unclear - I am speaking of threading the muzzle end to accept a muzzle device of some kind.

 

[dsm]

If the lathe is capable of handling the barrel and clearance for the action, there is no reason one can't indicate the barrel in order to thread the muzzle.

 

[triggerman770]

Barrel threading

I had rather remove them to thread, but having said that I have done it in a lathe with the barrel in the receiver using a 4 jaw chuck

 

[Jim K]

If the gunsmith has a lathe with a hollow headstock, threading and crowning muzzles is simple. Just stick the barrel through from the back of the headstock, clamp it down, and have at it. A bushing might or might not be needed.

Jim

 

[Zak Smith]

I agree with what dsm posted.

 

[isc]

I don't have a lathe, the barrels I've threaded were done with a die and TAT.

 

[Clark]

Just yesterday I had a barrel in the lathe without removing the action.

 

[Shimitup]

Clark,

That looks like a PM1236 with a paper towel under the gearbox. I do the same, Mine leaks too. It's been a good machine though. Is yours doing good work for you?

 

[Clark]

It did not leak until I tried to break in all the feed gears for the 100 hour oil change, and screwed up the gear shift. A key came loose and I screwed it to the shaft. I did not do the lower gear box gasket right.

The real leakage was from the carriage, after the 100 hour oil change, I over filled it, and it has taken months to leak down to the correct level.

 

[wildblue45]

Does anyone have a diagram of a home made barrel vise block.

Sorry, vise block for a AR-15.

 

[Shimitup]

I see that offset gasket, mine seems to be leaking at one of the lower shifter shafts. One ot these days I'll pull it off and see if it's a bad O ring, in ALL my spare time, not a high priority.