Rare part failure with S&W revolver

Sevens

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Got my first, a Model 17-6 in late 1988. S&W revolvers have been a part of my life since that time. I have other brands but 90% of my wheelguns are outta Springfield, Mass.

Occasionally there are problems... these are machines, it happens. We diagnose 'em and we fix 'em! Well on Saturday, I saw a failure that I have never seen before and also one that I've never read about!

My brother's first revolver and he's had it for about 14 months. 1970 vintage Highway Patrolman. We had a family shooting day at his house and he'd already shot half a box through it that afternoon. He loaded it, but it wouldn't cock and trigger wouldn't move. He handed it to me. I attempted to open it but could not.

I assumed the ejector rod had begun to unscrew. But that was NOT it! As the revolver was loaded (but not cocked, thankfully...) it was approached with caution. I quickly realized that we could not operate the action because the cylinder release was in the FORWARD position and yet the cylinder would not open.

I was able to manually to draw the thumbpiece back so that I could cautiously cock the revolver while pointing it down range. I cycled the action and all felt proper but yet the cylinder would NOT come open.

Manually drawing the cylinder release back, I elected to fire all six shots single-action, because the range was the safest place to unload this malfunctioning revolver.

Later, I was able to use a very slim pick to push the front lock on the ejector rod and finally, this freed the cylinder and allowed it to open. And I found what I suspected -- the center pin was gone. After taking it back home I was able to disassemble the cylinder with proper tools and I found that the last 1/4" tip of the center pin had snapped off and was in the wind, gone forever.

I was glad that tip was not inside the lockwork. I was also glad to find that unlike an ejector rod, this pin is not a fitted part so when I found one in my parts stash, the whole project was a clean and orderly fix.

I'm sure this has happened with a S&W revolver before but this is definitely not a common failure.
 
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Wow, never heard of that breaking. Perhaps someone was in the habit of flinging the action closed Hollywood style, which would be tough on that pin. N frame cylinders are pretty heavy.
 
Well I would have to guess no to the Hollywooding, simply because the yoke would get borked quickly from that treatment but the yoke is good to go.

Metal flaw in the pin, perhaps?
 
This same failure occured on a model 19 I was shooting in the 1980's.

It was fed a steady diet of factory .357's and the center pin sheared off.

The 19 was about 25 years old at the time. Smith & Wesson sent a new pin which was incorrect.

A new pin was ordered from Numrich which was the correct part.

Bruce
 
This same failure occured on a model 19 I was shooting in the 1980's.

It was fed a steady diet of factory .357's and the center pin sheared off.

The 19 was about 25 years old at the time. Smith & Wesson sent a new pin which was incorrect.

A new pin was ordered from Numrich which was the correct part.

Bruce
If we go by the adage that "older is better" then I'd say it was an even more rare failure for you than it was for me. This Highway Patrolman isn't a high mileage gun (best I can tell) and from 1970 whereas the one you describe would be either from the late 1950's or the mid-1960's at the latest.

This is nothing that I'm fretting about on any level, was likely just a metal flaw. I'm really, really hoping to hear of anyone else that has even heard of this failure.
 
As long as I have been here I have never seen a post about a center pin failure.

I looked in my parts and there was the broken pin and the pin S&W sent.

The difference is obvious in the spacing and diameter of the stop.

The 19 was an early model marked from 1958.



Not much of a picture but the problem is readily apparent. BTW I did clean up the end and it appears I used it as a punch.

Bruce
 
Something similar on my Model 60 years ago:
broke.jpg

Totally locked it up.
 
I have seen that failure a few times. It usually resulted from the extractor rod loosening and making it hard to open the cylinder and somebody using a mallet to open the cylinder, stressing the locking pin. If that is done repeatedly, that can weaken the rod, which can break at th sa35 t time or in the future. Probably a result of that type of abuse in the past. It is unlikely to happen again unless somebody does it again.
 
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