Author Topic: Can someone explain...  (Read 252 times)

Offline Navy Six

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Can someone explain...
« on: January 23, 2020, 02:47:09 pm »
Since the weather broke a bit today, I took a 1996 vintage Pietta 51 Navy(.36) out to shoot. When I got home and took the gun apart to clean, I noticed one of the frame pins had sheared off, with one half staying in the frame and the other half in the barrel lug.  For some reason I put a magnet on the half in the barrel lug and it came right out. On closer examination, I noticed the pin was not solid but had some type of "core" with a metal jacket surrounding it. I can only compare it to a copper jacketed bullet with a lead core. The part that stayed in the frame looks identical. The "jacket" is very even and a noticeably different material. I have never had a pin shear off like this so I've never had to drill one out of the frame yet. I bought the gun brand new so I know the pin is original.
My question is this: Is this how these pins are normally constructed? I was just surprised at what I found.
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Offline Tuolumne Lawman

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Re: Can someone explain...
« Reply #1 on: January 23, 2020, 05:47:28 pm »
All the ones I have seen have solid steel pins.... :o
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Offline Coffinmaker

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Re: Can someone explain...
« Reply #2 on: January 24, 2020, 08:55:28 am »

PLUS ONE too The Lawman.

I have seen the pins come out of the frame.  I have not had one that had broken.  What you describe, sounds to me like a steel pin with a crystalized center.  There would be no economic reason to make a small part like that out of two different materials.

Offline Major 2

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Re: Can someone explain...
« Reply #3 on: January 24, 2020, 09:31:40 am »
"...sounds to me like a steel pin with a crystalized center. "

ditto ...I think Coffin maker is spot on
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Offline AntiqueSledMan

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Re: Can someone explain...
« Reply #4 on: January 27, 2020, 06:34:37 am »
Hello Navy Six.

Sounds like a case hardened pin to me, when parts are case hardened only the surface is hardened.
I know on a Thompson Shaft (Trade Marked) when you face it off, the end will give the appearance
of two different materials. I'll bet the center is soft.

AntiqueSledMan.

 

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