doublegunshop.com - home Forums Thread Like Summary - Hinge pin arrangement, explain?

A plea to the body:

Explain the possible hinge pin methods in common use for SXS shotguns. Removable, not, etc. I am familiar with tapered, driven out with or with out set screw. Threaded with slotted head. Not so much with covers or caps or irreplaceable like a Scott 700. I read somewhere of the Birmingham method, made in place and I assume not removable or replaceable.

Looking for some insight!

Thanks,

Chief

There are basically 3 types of hinge or joint pin ,
1 Solid ,as an integral part of the action body .Used by Webley and Westley Richards as well as many other maker in the past.
2 Loose pin which was driven into the body with an interference fit ,frequently with locking pins of some description .AyA still use this method for example .
3 Screw in .Self explanatory a pin that is threaded and screws into the action. These are depending on the gun a " through pin " as one that goes completely through the action , Purdey being a prime example .Or. A "hidden" pin that only goes through the centre part of the action with caps or cover plates to " fill " the holes on the action bars .On many boxlocks that used either a screw or knock in pin the caps could be removable or blind , as in fitted with no intention of them being removed .
Re-jointing any gun has to be considered on it merits , be it a new joint pin or welding up the hook ,depending on how far back the barrel needs to move .
I have tightened and re-jointed hundreds of guns building up hooks as well as making new over sized joint pins .
In some cases with knock in pins that have worked loose the hole in the body can become elongated so needs to be reamed out and a larger diameter pin made .Knocking out and turning has in my experience been largely waste of time .
As to jointing new guns with loose pins , it was the practice to joint with a slave pin ,then to ream through and fit a correct size matching pin .

The list doesn't include Parker who used a 1/4" stove bolt for a hinge pin.

Graham;

Thank you very much. It seems to me that these tasks are not for the amateur or the faint hearted, especially being able to "just break the smoke" on jointing a double rife. I would like to be standing in a shop to watch it being done.

Stephen Howell

I bought a Fabrique Nationale d' Armes 16 ga. with 30" Krupp steel barrels. I handled the gun in a Cabela's store near me and I really like the way it came up and because it was a 16 gauge, my favorite I bought it cheap. It was a little loose , off face, so looking into it there was a large screw over the hinge pin on the left side, this was just a cap removed it to find another screw that was the hinge pin. Could not loosen it and looked over it carefully and where the gun breaks there was a tiny screw that secured it and prevented the hinge pin from turning (how I don't know). Unscrewing the hinge pin I found out it was slightly egg-shaped so turned it 180 deg. and lightly drilled a new spot for the set screw. The gun is a pleasure to shoot as it weighs 6 lbs. 1oz., 65mm chambers (2 9/16") side clips, Greener cross bolt. Made 1924-1927?

C'est magnifique, mais c'est ne pas la guerre...

On a shotgun the ideal would be >.002" /.004" . Please note the word ideal .
On a double rifle if would have been enough to " break the smoke " ,as in enough not to bare .

Graham

Salut Ted



Celle-ci en 32 mm a son record de 46 canards en une seule cartouche en 1946.

I think you would find it pretty boring after the first 30 minutes .
Graham