Replace P08 barrell - Page 2

sheepherder · 12-25-2009, 08:40 AM

Quote:

Originally Posted by Rick W.

I was wondering if anyone had a picture to share of a "setback tool" for use with new Luger barrel installations.

Yes; mine is shown below...

Quote:

Is this tool meant to be used manually or in a machine?

I prefer the pocket-sized carry-around model...

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You're certainly feeling frisky this Christmas morning...Kids get you up early???

alvin · 12-25-2009, 10:26 AM

What's the steel used on those German guns? I heard it's similar to 1030 carbon steel. Yield stength of 1030 is roughly 50000 psi at room temperature. Twisting the barrel permanently is not easy using hand tools.

Lugerdoc · 12-25-2009, 11:43 AM

With the jig shown above, I'd expect dinger front sight base, twisted barrel &/or enlarged chember. I learned the hard way, to chuck the barrel in the vise with brass shims, as close as possible to the wrench being used. 30+ years ago, before I had the proper tools, I mounted a 7.65mm 20 commerical barrel in a shop vise at the muzzle end, and found the barrel actually twisted 90 degrees before releasing from the receiver. Fortunately, I was not planning to save the shot out barrel, but would not do it that way again. TH

sheepherder · 12-25-2009, 12:29 PM

Quote:

Originally Posted by Lugerdoc

With the jig shown above, I'd expect dinger front sight base, twisted barrel &/or enlarged chember.

It's a quick & dirty photo mockup; using an old junk barrel. But I do use the cutoff tool to trim the barrel flange.

Don't know where you got the twisted barrel or enlarged chamber idea...

But that's OK...

Hawkeye · 12-25-2009, 03:50 PM

The receivers and the Slide are made of a High Carbon Alloys ,the barrels are a lot softer for some reason . I did a Rockwell; and a Halliburton test on the Barrel of one luger was worn out and they are surprisingly soft.
But the Barrels on handguns need to be soft to a point.,
The harmonics of the ignition and the compression of the bullet into the rileing would shatter anything that was to hard.
Yes a Luger Barrel will twist very easily with the Torque being put on them during installation.
Ive done it ,.and i have seen ti done several times , Mostly when a guns owner didn't like the fact that the front sight was pegged all the way to one side to correct windage.
That situation does look retarded , and it still takes a while for them to say OK to twisting their barrels a tiny bit .
But they like it a lot more later.

alvin · 12-25-2009, 08:47 PM

The following ebook is not directly gun related, but it's metal related or more specificly, steel related, I will post a link here. Some steel related chapters are interesting to read:

ebook(free): Steel Knowledge for Non-Professionals

The more I read, the more I feel this thing is complex.

Vlim · 12-26-2009, 08:35 AM

Dwight,

About the DWM gun smith: If he was 20 when the war ended, he would never have worked on, or around, the P08. I doubt that even DWM hired 4-year olds in 1929.

Vlim · 12-26-2009, 10:07 AM

Our forthcoming book will include a detailed overview of the steel types used in the production of the Swiss Parabellum, the late 1930s Mauser P08 and the post war Mauser Parabellum.

So I'm not going to give away too much at this point, but I can say that the late 1930s Mausers used a 36 Cr Ni Mo 4 steel type.

12-25-2009, 11:43 AM	#23
Lugerdoc Patron LugerForum Patron Join Date: Jun 2002 Location: POB 398 St.Charles,MO. 63302 Posts: 5,089 Thanks: 6 Thanked 737 Times in 484 Posts	With the jig shown above, I'd expect dinger front sight base, twisted barrel &/or enlarged chember. I learned the hard way, to chuck the barrel in the vise with brass shims, as close as possible to the wrench being used. 30+ years ago, before I had the proper tools, I mounted a 7.65mm 20 commerical barrel in a shop vise at the muzzle end, and found the barrel actually twisted 90 degrees before releasing from the receiver. Fortunately, I was not planning to save the shot out barrel, but would not do it that way again. TH __________________ Tom Heller POB 398 ST.Charles, MO. 63302 Tel 636-447-3006 lugerdoc@charter.net

12-25-2009, 10:26 AM	#22
alvin User Join Date: Jul 2007 Location: US Posts: 3,843 Thanks: 132 Thanked 729 Times in 438 Posts	What's the steel used on those German guns? I heard it's similar to 1030 carbon steel. Yield stength of 1030 is roughly 50000 psi at room temperature. Twisting the barrel permanently is not easy using hand tools.

12-25-2009, 03:50 PM	#25
Hawkeye User Join Date: Dec 2009 Posts: 14 Thanks: 0 Thanked 0 Times in 0 Posts	The receivers and the Slide are made of a High Carbon Alloys ,the barrels are a lot softer for some reason . I did a Rockwell; and a Halliburton test on the Barrel of one luger was worn out and they are surprisingly soft. But the Barrels on handguns need to be soft to a point., The harmonics of the ignition and the compression of the bullet into the rileing would shatter anything that was to hard. Yes a Luger Barrel will twist very easily with the Torque being put on them during installation. Ive done it ,.and i have seen ti done several times , Mostly when a guns owner didn't like the fact that the front sight was pegged all the way to one side to correct windage. That situation does look retarded , and it still takes a while for them to say OK to twisting their barrels a tiny bit . But they like it a lot more later.

12-25-2009, 08:47 PM	#26
alvin User Join Date: Jul 2007 Location: US Posts: 3,843 Thanks: 132 Thanked 729 Times in 438 Posts	The following ebook is not directly gun related, but it's metal related or more specificly, steel related, I will post a link here. Some steel related chapters are interesting to read: ebook(free): Steel Knowledge for Non-Professionals The more I read, the more I feel this thing is complex.

12-26-2009, 08:35 AM	#27
Vlim Moderator Lifetime LugerForum Patron Join Date: Oct 2002 Location: Europe Posts: 5,053 Thanks: 1,036 Thanked 3,990 Times in 1,205 Posts	Dwight, About the DWM gun smith: If he was 20 when the war ended, he would never have worked on, or around, the P08. I doubt that even DWM hired 4-year olds in 1929.

12-26-2009, 10:07 AM	#28
Vlim Moderator Lifetime LugerForum Patron Join Date: Oct 2002 Location: Europe Posts: 5,053 Thanks: 1,036 Thanked 3,990 Times in 1,205 Posts	Our forthcoming book will include a detailed overview of the steel types used in the production of the Swiss Parabellum, the late 1930s Mauser P08 and the post war Mauser Parabellum. So I'm not going to give away too much at this point, but I can say that the late 1930s Mausers used a 36 Cr Ni Mo 4 steel type.