How much torque on barrels

[Dgd6mm]

I have only had him do one barrel and after he did that I switched to another smith. The new smith had to cut the barrel to get it to come off. Here is a photo. Pretty bad looking isn't it.

Since he is a friend of mine and has been asking me to let him do another barrel how do you guys think I could correct him?

I'd tell him he's a better comedian then a selftaught gunsmith.

To the torque question, on my Savage nut barrels and nutless, both just tap the wrench with my deadblow hammer after being snugged.

 

[Erik Cortina]

It's a pretty bad picture (out of focus), but what is that on the tenon face? Is it brass? Explain what happened there.

I can tell the gunsmith made a plunge cut in front of recoil lug to release tension on the barrel, it must have been on very tight!

 

[Eddie Harren]

I've been getting a faint whiff of fish ever since the first post. Just now the whole tuna hit me in the face.

 

[butchlambert]

You also Eddie?

 

[Jay Christopherson]

Something is not right with that picture. It looks like a big chunk of the face broke off or something, although the picture is pretty bad.

 

[Toolbreaker]

Looks like it sheared half of the first thread off. Maybe galled until it seized?

 

[Grimstod]

It's a pretty bad picture (out of focus), but what is that on the tenon face? Is it brass? Explain what happened there.

I can tell the gunsmith made a plunge cut in front of recoil lug to release tension on the barrel, it must have been on very tight!

The brass color is oil.
That chunk that is missing is a groove for the extractor claw that is oversized. Very unusual I know. It's a supper sloppy job. I would never do something like this myself. It's just bad bad bad.

Your right about that plunge cut. It was on so tight it would not move and to prevent twisting the receiver the plunge cut made getting it off easier.

 

[TAJ45]

To answer the question the OP asked of "How do I correct him?........(he is clueless).

I'd just ask in a general way how he arrived at the torque needed for bbls. See what his thought process is. Maybe he was thinking Newton pounds?

You do say he is a friend so you should have a bit of history with him in general conversations..........how sharp is he? Good mechanical head? Understands physical, mechanical relationships? You should have a feel if he has all his oars in the water.

 

[TAJ45]

Do you guys think turning a barrel 1/8 - 1/4 turn past stop is stressing the threads and receiver?

Hail Yes! If it is 20 tpi a quarter turn = .0125"
If 18 tpi a quarter turn = .013888"

I'm trying to envision a plain ol' lug nut and a spider/4 way lug wrench. Once everything is in even, firm contact, a quarter turn is a bunch with 230# of me pushing down and pulling up simultaneously. Your barrel was screaming imo.

 

[Bob3700]

We use a synthetic moly greese. There is also a product called lube-torque. It is moly based as well. Keeps threads between the action and bbls from galling.

Bob

 

[Grimstod]

To answer the question the OP asked of "How do I correct him?........(he is clueless).

I'd just ask in a general way how he arrived at the torque needed for bbls. See what his thought process is. Maybe he was thinking Newton pounds?

You do say he is a friend so you should have a bit of history with him in general conversations..........how sharp is he? Good mechanical head? Understands physical, mechanical relationships? You should have a feel if he has all his oars in the water.

He came to this conclusion with a Google search that brought him to another forum. I think it may have been Longrangehunting.
I will have to ask him if he is thinking of newtons pounds.

 

[TAJ45]

Ummm, the Newton pounds was just a tongue in cheek..........I don't know how close what he did would correlate.

Unfortunately, when it comes to reading and gathering knowledge/experience, it takes knowledge and experience to filter what is read on "the net".

 

[butchlambert]

Wouldn't that be newton-meters?

 

[TAJ45]

Yer Right Butch........Newton Meters is correct for the brain phardt.

 

[Grimstod]

Lol

 

[Tozguy]

Do you guys think turning a barrel 1/8 - 1/4 turn past stop is stressing the threads and receiver?

OK i'll bite, YES definitely!

 

[Tozguy]

I have only had him do one barrel and after he did that I switched to another smith. The new smith had to cut the barrel to get it to come off. Here is a photo. Pretty bad looking isn't it.

Since he is a friend of mine and has been asking me to let him do another barrel how do you guys think I could correct him?

He is a friend of yours but are you a friend of his? Friends can usually talk more easily than that. I'd start by telling him that you don't want another barrel done like the first one and see if he turns out to be the friend that you think he is.

 

[X Ring Accuracy]

Apparently self taught smiths are idiots. Too bad your smith had a hard time with this. Aint rocket science.

 

[NYM]

How many of the 38 gentlemen who posted actually build there own weapons? How many pay someone else to do there build? How many of the 38 gentlemen who posted are using a forged steel receiver designed in the 1800's to base a precision target rifle. Do you consider 27 degrees past contact over tightening? That is what is required to tighten the barrel back to the alignment
marks on the receiver barrel joint. This is of course after cleaning - checking all component threading for distortion and oiling. I love my Mosin This may help you understand. https://www.youtube.com/watch?v=YOjYro4w0Bc

 

[shortgrass]

How many of the 38 gentlemen who posted actually build there own weapons? How many pay someone else to do there build? How many of the 38 gentlemen who posted are using a forged steel receiver designed in the 1800's to base a precision target rifle. Do you consider 27 degrees past contact over tightening? That is what is required to tighten the barrel back to the alignment
marks on the receiver barrel joint. This is of course after cleaning - checking all component threading for distortion and oiling. I love my Mosin This may help you understand. https://www.youtube.com/watch?v=YOjYro4w0Bc

I count 10 that I know of, for sure! There are probably a couple more. NONE use 1880s' era receivers or would use 1880s' era receivers or would tighten to that excessive amount.