fixing buggered gun screws

Discussion in 'Gunsmithing Forum' started by TINCANBANDIT, Jan 3, 2014.

  1. TINCANBANDIT

    TINCANBANDIT Member

    395
    16
    18
    I have found lots of guns with buggered up screws because someone used the wrong type of screw driver on them. you should always use a HOLLOW ground screw driver.

    [​IMG]

    The results of using the wrong screwdriver look like this:


    [​IMG]

    Fortunately, the repair is easy and anyone can do at home with minimal tools

    The first step is to "peen" the metal back into shape, you will need a brand new ball peen hammer (or an old one with a freshly ground and polished face). the face of the hammer must be smooth or your results will vary as the dents in the hammer face will affect the surface of the screw head.

    Once you have the hammer, find a piece of steel (1/4 or thicker) and drill a hole just slightly larger than the threads of the screw

    [​IMG]

    Wrap the threads of the screw with masking tape and seat it in the hole

    [​IMG]

    next gently "peen" the metal back down, remember to move the hammer around and don't strike it too hard. the object is to push the metal back down close to its original location.

    Next take a parallel needle file that is the correct width for the slot and file the slot so that you remove the extra metal.
    (sorry I forgot to take a picture of that part)

    The next step is polishing: get your self a piece of pine wood (any soft wood will suffice), some sand paper (220 & 600 grits), some WD-40 (or other lightweight cutting oil) and a drill. Wrap the screw threads with tape again and chuck it into the drill motor.

    [​IMG]

    Then lay the sand paper onto the pine board and coat with cutting oil, press firmly on to the paper and spin the screw. You can push hard here as the wood will yield to the pressure and create a depression for the screw head. You will need to move it around as the sand paper will get torn up. Start with the 220 grit and finish with the 600 grit (go even higher for a nicer finish)

    [​IMG]
    The next step is re-finishing the screws. I used cold blue which is fine for small parts as it is next to impossible to hot salts blue tiny parts.....



    [​IMG]
     
  2. JonM

    JonM Moderator

    20,110
    15
    38
    Very handy.
     

  3. Steel_Talon

    Steel_Talon New Member

    1,766
    0
    0
    Thanks for the "How to"
     
  4. John_Deer

    John_Deer New Member

    6,624
    1
    0
    Hopefully this is one trick I will never have to use. I don't buy guns with buggered up screws. I have proper tools here.
     
  5. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    7
    2
    0
    excellent tip! much better than my method with a file. :D
     
  6. Solon

    Solon New Member

    37
    0
    0
    Excellent tip and photos. I really like using the soft pine and sandpaper idea.
     
  7. jdsingleshot

    jdsingleshot Member

    55
    0
    6
    When I have done that I have used a small punch so I can steer the metal back in place more precisely. you can do this with dents and gouges in receivers too.

    Jim
     
  8. clr8ter

    clr8ter New Member

    4,015
    0
    0
    On such a simple, cheap item, why not just buy a new one?
     
  9. dwmiller

    dwmiller Well-Known Member

    3,494
    164
    63
    Because they are a PITA to find correct screws. That's why gunsmiths keep drawers full of old parts...

    Brownells makes a set of edge cut files to make the screw slots, easier than a needle file. Cuts cleaner also. Consider case hardening the screw heads to prevent future gauling. Product called Casinite does it simple and quick. Heat with a torch and dunk in the goop. Instant surface hardened part. Good stuff.... ;)
     
    Last edited: Jan 26, 2014
  10. jdsingleshot

    jdsingleshot Member

    55
    0
    6
    Depending on income, some would say the same thing about the whole gun.

    My position is, since the screw is so easy to fix, why be lazy and buy a new one?
     
  11. deg

    deg Active Member Lifetime Supporter

    2,355
    24
    38
    I hear ya. However, for me it isn’t about the $3 for a new screw, it’s the satisfaction of making the repair or maybe just keeping it original or….I don’t know if I really know; I just enjoy fixing it.
     
  12. jason79

    jason79 New Member

    52
    0
    0
    I was going to say the same thing, I enjoy the challenge of fixing something, then looking at it. Why buy a new one if the old one just needs a face lift. Thanks for sharing, I will definitely use this method next time.


    Sent from my iPhone using Firearms Talk
     
  13. molonlabexx

    molonlabexx New Member

    980
    0
    0
    This is awesome!! I bought a Winchester gunsmith screw set. Should be here soon. Expect a review!!
     
  14. Axxe55

    Axxe55 The Apocalypse Is Coming.....

    7
    2
    0
    some screws are a certain size and length for a particular application and sometimes it's easier to repair them than to replace them. some screws are very specialized and hard to find to replace.

    the ability to be able to repair something even as simple as a screw, is many times an invaluable skill that doesn't leave you at the mercy or trying to find a replacement.
     
  15. Franklin1995

    Franklin1995 New Member

    565
    0
    0
    Thanks for the explanation. I did not realize that you had to use a certain type of screw driver. Learn something every day :)
     
  16. Highpower

    Highpower New Member

    1,546
    0
    0
    ... As well as a guide that makes it simple to keep the new slot centered and straight across your screw head.

    [​IMG]

    Great post TCB. Chucking a screw in a small drill press also works well for quickly re-contouring or crowning a screw head with a file. Before polishing with the wood block and sandpaper of course.
     
  17. dwmiller

    dwmiller Well-Known Member

    3,494
    164
    63
    Nice! I hadn't seen the guide before, so I built my own. Wood block with screw holes in a line down the middle. Two slotted blocks to hold the edge file.

    I think after looking at the guide I'll be adding another tool. I especially like the replacable guides.... ;)
     
  18. Highpower

    Highpower New Member

    1,546
    0
    0
    You won't regret it. The guide rollers are thoroughly hardened. I don't think you would ever wear them out. It is nice to be able to take them off to clean and oil them from time to time though.
     
  19. Tactical_Lever

    Tactical_Lever New Member

    27
    0
    0
    Good stuff! Its these little day to day skills and tricks that are slowly being lost. Reminds me of the first time hearing that someone took their rifle to a store to get a scope mounted.

    I was as follows: "What?.. Really? You don't own a couple of screw drivers??"