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Welding on Firing Pin to make it longer.

Discussion in 'Gunsmithing and Repairs' started by LRShooting, Feb 1, 2014.

  1. LRShooting

    LRShooting Well-Known Member

    I was wondering if I could weld a small bead on the end of the firing pin on my Stevens 987 22lr. It had been used a lot before I saved it from going to the junkyard. The firing pin was completely wore out and wouldn't fire. After a few strokes with a file to sharpen it, it worked a little better, but misfires occur pretty often. The firing pin just barely leaves a dent and protrusion is minimal. It needs to be made longer and I think a small weld bead on the end would work with some file work and measuring. I need a better opinion then my own though. I haven't done it before.

    Heres the link if you wanna see what the firing pin looks like. I don't feel like taking pictures. https://www.gunpartscorp.com/ad/109990.htm#109990G
  2. birdshot8's

    birdshot8's Well-Known Member

    You sould get specs and measure yours to see if it is a length issue. I would weld on the base if it was needed. Also You would probably have some temper issues after welding. You could probably get a new one form numrich or such.
  3. LRShooting

    LRShooting Well-Known Member

    Yea, specs are gonna be kinda hard to find. Numrich is the URL I have up. I bought all new springs, new magazine guide, and a couple other things for the 987 off Numrich. They have most stuff. Ill try to find some specs first to make sure.
    If you look at the firing pin, you cant weld on the base. The way its made does not allow me to do so. The T-shaped butt of the FP fits snug into the hammer. So the only option is on the tip. Temper would be an issue though. Never thought of that really. Welds are usually pretty hard, but it depends on what it would do to the firing pin around the weld. Ill have to do some research. I suppose at any rate, its not gonna cost me any more to try and fix it first if there's gonna be a temper problem no matter what. I need to find the specs first and make sure that's the problem though like you said.
  4. birdshot8's

    birdshot8's Well-Known Member

    i looked at your link. Check the areas inside the firing pin channel for a build up which could have prevented the firing pin from traveling forward.
  5. rcmodel

    rcmodel Member in memoriam

    Might be possible to heat it cherry red in the thick section and peen it to stretch it another few thousandths?

    You would still have the tempering issue to deal with, but I think you would be alright if you quenched it in oil from cherry red.

    Then polish it and draw to temper to a yellow-brown color (500 degrees).

    BTW: I have ask a mod to move this to the Gunsmithing Forum.

  6. jmorris

    jmorris Well-Known Member

    I have built up entire jaws for bolt and cable cutters with 4130 filler rod and a TIG welder. Should be an easy job if you have the proper equipment.
  7. LAGS

    LAGS Well-Known Member

    I agree with RCmodel about trying to Peen the end longer.
    And if that doesnt work, then try welding the tip area and Oil hardening it.
    It is a 22 and is not as critical as a centerfire rifles firing pin as far as strength.
    But it will need to be harder than just cold rolled steel.
    If you are going to heat it up, Make sure you use a Heat sink of some sort to prevent the whole firing pin from getting heated up.
    Something like clamping two pieces of steel on the sides with Vise grips, so you can work on just the tip area.
    I have no idea of your skill level , or if you are going to be doing the welding yourself.
    But If I were you, I would opt for ordering a new firing pin if the inside of the Bolt body is clean.
    Welding of parts, is the last option I would try, and only if new parts can not be found.
    Also try Jack First Guns for the parts.
  8. I know you said all new springs but your sure its not a weak firing spring issue?
    Sounds like a fun project. Good luck!
  9. LRShooting

    LRShooting Well-Known Member

    Parts are available. My link is a source for pretty much every part to build that 987 from scratch. Has quite a bit of stuff for every other gun too. Or at least the ones I have checked out. One question though, why would welding the firing pin be the last option? I mean, buying one means $20-25, when welding means basically nothing but a little time. Is Could welding cause issues that would mess up other stuff? Like I said, I haven't done it before, so I wanna make sure I am not gonna end up being worse off then I started.

    As far as skill level, I am not trained professionally in anyway, but I have been welding for probably 10 years. Pretty frequently too. Farm equipment always breaks :cuss: I have some expierence with hardening in oil and water. I have everything I would need including oxy-acetylene torch, MIG, bench grinder, hammers, anvils, etc... No shortage on tools.

    Basically, if the general consensus here is don't do it, Im not going too. I don't feel like screwing up something else. The 987 is so simple though that it would take something really major to damage it badly. Its not a target gun or anything, but more of just a plinker and "utility" gun for draggin' along with me coon hunting and checkin trap lines.

    BTW: Thanks everybody for the replies. This site is great for figuring out stuff.
  10. LRShooting

    LRShooting Well-Known Member

    Yea, it feels pretty solid when i pull the trigger.

    This is only a minor detail of the project. The big part is in this thread http://www.thehighroad.org/showthread.php?t=740510 :D
  11. Oh wow. Very cool. After all that work I'd gladly pay $25 for a firing pin I could count on if it was available.
  12. LAGS

    LAGS Well-Known Member

    @ LRshooting.
    When you put it in the context of a Project gun and you are using it to Build your Skills, then I see your point.
    And if it doesnt work, then you can always get the part if you need too.
    I can relate to that. I often try things like what you are doing, so I know what works and what wont, when I find a gun that I can not get the right parts for.
    But Let me ask ?
    Have you checked the actual firing pin protrusion ?
    It should be between .035 and .040 "
    If it already is, and the tip has been cleaned up and De-Burred, then you have another issue.
    Also, I am not familiar with this action, or what area of the firing pin actually stops the forward progress of the pin when fired.
    There are sometimes ways to re fit the area of the stop and let the pin move forward a bit without lengthing it.
    But, Know your protrusion first , and carefully evaluate if anything else in the action functioning will be effected by the adjustments needed.
    But, If you find the area that stops the pin travel, It would be Best to do any Fitting or stoning on the Firing Pin Part and not what it stops against.
    That way you are still only talking about a firing pin replacement if it doesnt work.
    Last edited: Feb 1, 2014
  13. LRShooting

    LRShooting Well-Known Member

    Ok, thanks a lot. There is no way to trim a little off the firing pin to make it go further. The only way would be to put the slug on a lathe and trim it down a couple thousandths. I might as well get a new firing pin rather than do that. Its a really weird design so its hard to tell unless you see a diagram or take it apart yourself. Ill check protrusion and see.
  14. rcmodel

    rcmodel Member in memoriam

    Something else to check is excess headspace from bolt wear over the years.

    Or, a ding in the barrel face under the firing pin from dry-firing.

    Either will cause soft firing pin strikes.

  15. LRShooting

    LRShooting Well-Known Member

    I checked protrusion. Measured .025".
  16. gamestalker

    gamestalker member

    I like RC's idea. I would suspect that if it's short, it's only short by a few thou, so peening in the center might lengthen it just enough. It would probably be much easier to do than welding material onto it.

  17. rcmodel

    rcmodel Member in memoriam

    Correct protrusion doesn't matter if you have excess headspace.
    Or a ding in the breech face from dry firing.

  18. LRShooting

    LRShooting Well-Known Member

    I checked headspace and everything. Heres the deal with this gun though. Its a semi, and there really ends up being no such thing as headspace. If you take the barrel off, the bolt will go .035" farther. Face of bolt and breech are both good and flat too. Also no firing pin marks. Thank you for the suggestions though. It narrows everything down and makes sure it isn't something else.
  19. Tilos

    Tilos Well-Known Member

    Maybe I missed something but, sorry, I have to ask
    Why not just buy the pin you linked to?

    That or file/thin the lump at the rear that limits the forward travel
  20. jmorris

    jmorris Well-Known Member

    If you had a TIG and the correct filler rod you would be fine. Maybe a MIG and some Kasenit, if you don't blow the part away.

    If the part already needs to be replaced, what are you going to loose trying to repair it?

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