how do u remove a screw that has a stripped head? | FerrariChat

how do u remove a screw that has a stripped head?

Discussion in 'Technical Q&A' started by ross, May 12, 2005.

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  1. ross

    ross Three Time F1 World Champ
    Owner Silver Subscribed

    Mar 25, 2002
    37,965
    houston/geneva
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    Ross
    am faced with removing a screw to allow me access to another part, and the phillips head on it has been stripped such that i cant get any leverage on it and cannot get it off....
     
  2. richard_wallace

    richard_wallace Formula 3

    Feb 6, 2004
    1,957
    Cincinnati, Ohio
    Full Name:
    Richard Wallace
    Sears and other Hardware stores will carry a tool to remove screws with stripped heads... A good thing to have in your tool box - If I remember costs about 10 bucks...
     
  3. f355spider

    f355spider F1 World Champ
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    May 29, 2001
    18,044
    USA
  4. thecarreaper

    thecarreaper F1 World Champ
    Silver Subscribed

    Sep 30, 2003
    18,054
    Savannah
    drill the remains of the head off until you just break through the head. use a drill bit one size smaller than the hole size of the fastener itself. remove your part or panel and use vise grips to remove the remaining stem of the fastner. if you cant get the head to just pop off once you have drilled though the head, (not through the whole thing !) take a punch the same size as the hole you drilled and pop the head off. i do this with steel and titainium stuff all day on airplanes at work. cars are a piece of cake, even the old valuable ones. :)
     
  5. Dane

    Dane Formula 3
    Owner

    Apr 25, 2002
    1,512
    Michael hit it on the head (no pun intended). That's very similar to how I've done it.
     
  6. donaldh2o

    donaldh2o Karting

    Nov 10, 2003
    143
    Irvine CA
    Full Name:
    Don
    Ok, I've done this dozens of times, even on my old Ferrari ('76 308).

    If its a large screw, then drilling it out might work. If the part is still on the car then you are stuck drilling it out with a hand held drill which is very unstable and inaccurate. Generally, the material the screw is screwed into is much softer than the screw itself and you'll likely end up just drilling a hole into the material as the drill continuously slips off the screw.

    I have a very small pair of Vice Grips (3" or 4" inches), the needle nose version. Often, if the screw cap is still intact, laying the Vice Grips flush against the surface so it grips both sides of the screw cap it will get the thing off. Sometimes I have to adjust the pressure on the Vice Grips so that they actually crush the screw cap. Then slowly, very slowly, remove the screw.

    Another method is to bare down on the screw with a good philips head screw driver while tapping the end of the screwdriver with a small hammer as you try to unscrew it. The tapping does two things: It breaks the screw threads loose from the material and it kind of restores the philips pattern in the screw cap.

    Good Luck!
     
  7. geekstreet

    geekstreet Karting

    Feb 7, 2005
    220
    Sydney
    Full Name:
    Cam
    Tried an impact-driver (the one you hit with a hammer, not a torque-wrench) with a philips head bit?
     
  8. Verell

    Verell F1 Veteran
    Consultant Owner

    May 5, 2001
    7,022
    Groton, MA
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    Verell Boaen
    If you can't just drill the head off & remove the part so you can get at the body with vice grips (easiest alternative), try a 'Screw Out' from Sears & other places:

    http://www.sears.com/sr/javasr/product.do?BV_UseBVCookie=Yes&vertical=TOOL&pid=00952154000

    A screw out digs itself into the screw head & backs it out. Has worked for me a couple of times. There's actually a video showing them in operation if you click on 'details' you'll see the gadget to click on for the video.

    If you have to actually drill the screw out, use a cobalt drill bit. It's made for drilling metal & will take out a hardened steel fastener. Use a cobalt drill noticably smaller than the screw you're removing, less chance of taking out the threads.

    What size is this infamous screw?
     
  9. Jdubbya

    Jdubbya The $10 Trillion Man
    Silver Subscribed

    Dec 28, 2003
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    John
    You can also try cutting a new or larger slot in it with a small die grinder or dremel tool. This only works if the head is large enough and there will be enough meat left for the screwdriver to grab.
     
  10. Chiaro_Slag

    Chiaro_Slag F1 Veteran

    Oct 31, 2003
    7,789
    CA
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    Jerry
    Bob Villa just sold me - I don't even need it right now & I'm getting my a$$ over to Sears to get one. :)

    Thanks
     
  11. ross

    ross Three Time F1 World Champ
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    Mar 25, 2002
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    Ross
    thanks guys. i think i will try the sears tool.
    the problem with this screw, about 5 mil head size, is that the distance between it and the next surface is only about 6 inches, so a small handled screwdriver is the only that fits and you cant get enough leverage on it, and not a lot else fits in there. add to that the screw lies flush within a recessed hole and it get hard.
    anyway, will try the sears tool.
     
  12. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
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    Phil Hughes
    You can put a blob of valve grinding paste on the tip of your best fitting screwdriver to help grip.

    Or PVA wood/paper glue and grit off the floor if you don't have valve grind paste....
     
  13. Verell

    Verell F1 Veteran
    Consultant Owner

    May 5, 2001
    7,022
    Groton, MA
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    Verell Boaen
    Da*n, that's a tough one all right.

    Hmm, Have seen power screwdrivers with a 90 degree head somewhere (Sears? Harbor Freight?)

    Also, sears has small ratchet wrenches that take 1/4" Hex bits, try one with the screw remover. That way can ratchet with room to push the end into the screw.Think they are usually with the ratcheting 90 degree screwdrivers.

    Good luck, you're going to need it fer sure.

    Ferrarifixer, the valve grinding past is a good one! Suspect that household abrasive cleaner would be an substitute.
     
  14. Matt Morgan, "Kermit"

    Matt Morgan, "Kermit" Formula Junior

    Nov 12, 2003
    405
    Ferndale, WA
    I'd say the Sears one MUST be the easiest to use. Just look at his hands, they aren't even dirty! LOL
     

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