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Thread: I hate pins.

  1. #1
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    Default I hate pins.

    So one of my rifles came with a rear sight leaf that had the a broken sight leaf pin in it and it has been a muther hugger to get out. I've broken at least 4 1/16" punches and only managed to move it out about 1/4 of the total distance I need. It has to be oversized because before I even started punching it (before any swelling) it was incredibly stiff. I used liquid wrench, and keep punching but don't want to buy any more punches.

    Does anybody have any ideas on how I could get it the rest of the way out? I am trying to do everything except drill it out. I don't want to risk damaging the hole any more since it is a matching part of the rifle.

    In addition, does anybody know the exact width of the pin? It seems like a 3mm to me but was wondering if anybody knew for certain?

    Also if anyone has any correct pins I'll be in the market for some here in a bit!

    Thanks in advance!

  2. #2
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    3mm? Thatís huge, are you sure this rifle has a pin and you arenít simply hammering on the milled leaf pivot? Just a guess off the top of my head the sight leaf pins are closer to 1mm which would make your 1/16 punch larger than the pin. Also did your punches break or just bend? Most 1/16 punches arenít tempered nearly the same as larger punches and simply bend a lot, for starting purposes itís always good to keep a short punch around, take one of the broken or bent ones and cut it off about 3/8-1/2 from the start of the main body diameter and that will give you a much stiffer starter punch just to get things moving. Iíve never encountered a sight pin that was very seized at all though, so double check whatís going on here? A picture might be worth a thousand words.

  3. #3
    Member GEM's Avatar
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    Best to post a picture.

  4. #4
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    Well there's honestly not much to show, just a broken pin sticking out of the leaf on one side and the hole on the other. It's not a milled solid leaf; it has the pin hole in it. As I said I did manage to move the pin partly out.

    I could be very wrong with my 3mm guess. I'm no metric expert. Either way the pin was too large and whoever installed it... I don't know how they did because it's horrendously tight.

    The 1/16" punches I have are smaller than the pin, but the only punches I have that fit the hole. They bent at first, then I straighten them out, and repeat. One punch broke short and like you said it had more strength and that's how I got it to budge as far as it did. I've removed lots of these pins before but none have given me the fight that this one has.

    Any idea on a larger punch or even one thats the same size as the pin itself? I'm getting desperate and the drill is looking more and more appealing.

  5. #5
    Senior Member Eh jbmauser's Avatar
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    I use a Snap-on 1/16" pin punch part no. PPC402A for removing rear sight leaf pins. Never had one that didn't tap out easily so I'm not sure what's going on with your sight. I have found a small amount of heat to be helpful on various other jobs I've done when removing tight fitting pins/parts. Obviously too much heat isn't a good thing so you would have to be very careful. Melting the solder or discoloration of the parts is a possibility if done incorrectly.
    WTB: Rough milled, blued, unnumbered floor plate as found on late MO rifles. Unnumbered MO bands, both KM and standard type, MO KM stocks including an unaccepted one, MO bands and stock 5897, upper band 0643

  6. #6
    Senior Member moconfed's Avatar
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    What year and code is the rifle?
    In thanks for you all in the forums, I offer this, albeit small:
    If anyone has any questions regarding garage doors and openers, feel free to ask. Been working on them for 25 years.

  7. #7
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    Quote Originally Posted by moconfed View Post
    What year and code is the rifle?
    It's a 1936 S/42. Not all matching but alot of the parts are and I'd like to keep the few matching parts in good shape.

  8. #8
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    I'd put it through a couple of heating and cooling cycles while using a penetrating oil in between.

    Boiling hot water is excellent for this; it will heat the area thoroughly, won't affect bluing or solder. Dries instantly.

    If you pour it on let it air dry for a minute, then hit it with your oil of choice. The latent heat and the nature of oil will draw the oil into the tiniest reaches of the assembly.

    Having a good solid bench set-up, proper tools and good lighting should be a given.

  9. #9
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    Sounds like the pins are probably 1.5mm then. I typed up a response last night and then pushed a button and the whole thing disappeared, donít you just hate that!! If itís that tight there is a chance that someone replaced it in its life with a non standard pin that is possibly oversized because this should not be an interference fit pin. Iíve only ever used some brass punches turned down to the exact size and theyíve never given any trouble even with just brass. Good luck and Merry Christmas!

  10. #10
    Senior Member moconfed's Avatar
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    You mentioned not all parts match. Does the rear sight base match the receiver? What is the barrel code? Is your front sight base cut for a hood?
    In thanks for you all in the forums, I offer this, albeit small:
    If anyone has any questions regarding garage doors and openers, feel free to ask. Been working on them for 25 years.

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