How should one get a complete replacement bolt for a NDM 86?
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Thread: How should one get a complete replacement bolt for a NDM 86?

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    How should one get a complete replacement bolt for a NDM 86?

    I screwed up my NDM 86 bolt decades ago by firing it when it was piercing primers. The bolt hole for the firing pin is no longer in spec.

    How should I replace the bolt? Not sure that fixing the original bolt is possible.

    The Russian trade agreement seemingly won't let me buy one from Russia and the Chinese seem not to be an option either.

    Do I have to go back to just leaving it the rear of my gun safe?

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    pictures would be great in explaining what happened.

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    For a 7.62x54 or 51? if 54, try contacting the SVD accessories on gunbroker and be willing to spend lots! if it's a 51, you'd have to have someone that has one borrow it to you to have a machinist make a duplicate.

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    I did this to myself in the late 1980's. I did not save the Yugo commercial 7.62x54R cases but they looked like the pierced ones at this site - Dragunov
    The pierced primers acted like little blow torches and damaged the firing pin hole - enlarging it - in the bolt face. I tried for over a year to get it fixed - a gunsmith tried to manufacture a new firing pin - but it still pierced primers - so it just sits in the back of my safe. When I get in a cynical mood, I wonder if they actually did anything with the rifle. Even if I do get a new firing pin, I would still want to have a new bolt just so I have a standard size hole for the firing pin.

    The various trade agreements and embargos seem to prevent me from getting a new bolt assembly from either China or Russia, but perhaps one of the former Soviet states is exporting them now?

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    You stand a better chance of finding someone to repair it.

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    Any suggestions on a gunsmith for this job?

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    I would think a good machinist could probably bore out the firing pin hole and sleeve it.
    WTB:
    SVD: stock and handguards, FSB, gas regulator, 1200 meter rear sight
    Chicom: trigger guard, spiker FSB, gas block, underfolder rear trunnion

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    Any recommendation for someone who has successfully done such a sleeve?

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    I wonder if welding it up and re heat treating would be possible and then re drill the hole. You will find occasional SVD bolts on gunbroker..usually 400 plus if they do come up. look up Genuinemilitaria on gunbroker..hes in Poland. x54r parts usually..

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    Will do, he has 3000 positive feedback on gunbroker under Genuine-Militaria even though a guy on AR15.com called him a scammer in a 2010 thread.

    Right now, I am willing to try anything reasonable to fix this rifle.

    It is the most evil looking weapon I have, would like to make it no longer the most disappointing weapon I have too.

    *Realized that he was the first guy I emailed who responded - states the bolts are forbidden to him. He has 11 pages of stuff on gunbroker - interesting items.

    Will keep checking gunbroker on at least a weekly basis.

    Thanks
    Last edited by rogerbutthead; 05-21-2015 at 12:43 PM.

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    It shouldn't be difficult to repair for someone who is a decent machinist/welder. With a TIG machine and someone who is good, they should be able to fill the original hole without affecting the temper on the lugs. Then it would just need to be milled flat and put in a lathe and redrilled. You should try TurboThis and see if it's something he could do. He's pretty damned talented although he's a busy guy.

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    I took the rifle out of storage but my camera is not cooperating with me. Seemingly I can video but not take pics? Pretty inept technically. Can't find the damn instructions.

    The video is of an invalid type? Anyway the firing pin enlargement is not as large as I remember so I will try the new firing pin attempt first.

    Thanks.


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    dvs
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    hard to tell from the video on the size of the FP hole. if you can get your camera working take some from slightly off center and a side angle of the FP hole.

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    pics - sorry I am total crap at photography. Kinda looks like the firing pin hole was superimposed over a cloverleaf pattern.
    Attached Images

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    DSC00729.JPGDSC00733.JPG
    two more pics, many more were more blurry than these. My eyesight is poor, sorry.
    Attached Images
    Last edited by rogerbutthead; 05-21-2015 at 10:36 PM.

 

 
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