doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Trigger work and heat treating

Should trigger or sear parts be re heat treated after work is done to lighten a trigger or correct a doubling problem?

Example, Fox 12ga that would double. Some light sear edge adjustment fixed the problem. Does the part need to be cooked again after the work is done to keep it from wearing?

up

It's like twice baked potatoes

If the work done did involve heating the part to loose all it's hardness and strength, then, yeah, re-heat-treating would be called for.

Assuming there is a problem with the current part, checking the current hardness would be the first thing to do. It does not necessarily need to involve a hardness testing machine: for instance, simply touch it with a file to compare the bite with that of other desirable chunks of steel (do this on a harmless spot and don't use your best file either).

If it is a case hardened part, then re treatment would call for case hardening again if the outer layer of metal has been removed. If the case hardened layer is still there, then re-heat-treating is easy if it is necessary.

Don't forget the annealing afterwards - those post operative treatments are the most important.


Meanwhile, just giving the sear a slight oil stone touch up should not eat out a layer of case hardening, and if we are talking about a plain part heat treated to the core, then no amount of hand adjustment rubbing will get it soft.

That's a bummer, the harder you rub, the softer it gets.

And memory goes next.



So, anybody know, where the internals of a fox case hardened or hardened all the way through.

Bubba at some point worked on the sear, leaving a gun that would double. Had the sear touched up again and took care of the problem.

Wondering if I need to do something so it doesn't just wear back into a problem.

I know what SixBears meant, but don't "Anneal" after you finish. If re-hardening becomes necessary you just want to "Temper" it at say 300°-350°F. An inadverdant slip up on terminology I'm sure, but annealing is a process which removes all hardening & leaves a part dead-soft. I can give no advice though as to what type of steel Fox used for these parts.