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Thread: Buggered bolt

  1. #11
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,832
    I'm Geoff.

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    I see somebody else has mentioned snapping screw extractors.

  2. #12
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,177
    I'm Steve.

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    Plenty of penetrating oil and cut a slot using a Dremel or similar cutting wheel. Can make as wide as slot as needed.
    This method, scaled up, worked on a buggered Torx M10 bolt on a VW Passat half shaft but using a 1mm thick cutting disc on an angle grinder.
    I then used a air hammer wrench with a slotted bit too extract said bolt.
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  3. #13
    Join Date: Nov 2011

    Location: Wakefield west yorkshire

    Posts: 1,332
    I'm James.

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    Quote Originally Posted by Oddball View Post
    Screw extractors are ok if you think the threads nice and loose but snap them off and its a world of hurt because then you have a hardened piece that you defo cannot drill out .
    Any chance you could mig a nut onto the existing rounded off allen head ?
    Mig? There's no way of gripping the outside of the bolt, smooth round shallow dome and the inner Allen recess has rounded off too much. A 10 minute job it should've been
    cambridge audio azur 651w power amp, novafidelity x40 music server/pre/dac, tannoy dc4t]
    , van damme blue series interconnects, van damme studio blue 4mm speaker cable, klotz mc 5000 ,klotz silver hybrid, thanks Brian, fisual hollywood optical cable,, pioneer bdp170, akg k 550

  4. #14
    Join Date: Nov 2011

    Location: Wakefield west yorkshire

    Posts: 1,332
    I'm James.

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    Quote Originally Posted by CageyH View Post
    If buying screw extractors, get decent ones because if you have one snap, you have a bigger problem.
    If drilling stainless, I would suggest cobalt drills, use a slow drill speed and cutting lubricant.

    You can't get a set of mole grips on the head?

    Try soaking the bolt with a decent dismantling lubricant, like plus gas for a few days. Then try the mole grips.
    Another way of getting the bolt out is to hammer a torx bit into the allen bolt, but I don't like doing this. It damages the tools.
    Thanks for the suggestion of drill bit.i reckon it's the way I'll go as drilling the middle of the bolt worked well , though it was ages ago since I've done it.theres no way of gripping the bolt at all now the Allen recess has rounded off.
    cambridge audio azur 651w power amp, novafidelity x40 music server/pre/dac, tannoy dc4t]
    , van damme blue series interconnects, van damme studio blue 4mm speaker cable, klotz mc 5000 ,klotz silver hybrid, thanks Brian, fisual hollywood optical cable,, pioneer bdp170, akg k 550

  5. #15
    Join Date: Oct 2017

    Location: Ontario, Canada

    Posts: 570
    I'm Svend.

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    If the allen hole still has a bit of original shape to it, not totally rounded off, you could try this stuff: http://www.screwgrab.eu

    I've used it on many a stripped screw and allen head, and it's amazing stuff. Grips like a mad thing. Everyone's tool kit should have a little bottle of this.

    Good luck!
    Svend

  6. #16
    Join Date: Nov 2011

    Location: Wakefield west yorkshire

    Posts: 1,332
    I'm James.

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    Quote Originally Posted by Svend N View Post
    If the allen hole still has a bit of original shape to it, not totally rounded off, you could try this stuff: http://www.screwgrab.eu

    I've used it on many a stripped screw and allen head, and it's amazing stuff. Grips like a mad thing. Everyone's tool kit should have a little bottle of this.

    Good luck!
    Svend
    Cheers Svend
    cambridge audio azur 651w power amp, novafidelity x40 music server/pre/dac, tannoy dc4t]
    , van damme blue series interconnects, van damme studio blue 4mm speaker cable, klotz mc 5000 ,klotz silver hybrid, thanks Brian, fisual hollywood optical cable,, pioneer bdp170, akg k 550

  7. #17
    Join Date: Jun 2014

    Location: Chorley Lancs

    Posts: 1,579
    I'm Steve.

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    Quote Originally Posted by Ian7633 View Post
    I think this is the tool that Steve was talking about.

    https://www.ebay.co.uk/itm/5-Screw-E...UAAOSwCcZaLtyf
    Cheers Ian, that's it exactly.
    'I'm not crazy, my mother had me tested'

  8. #18
    Join Date: Jun 2014

    Location: Chorley Lancs

    Posts: 1,579
    I'm Steve.

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    Quote Originally Posted by Svend N View Post
    If the allen hole still has a bit of original shape to it, not totally rounded off, you could try this stuff: http://www.screwgrab.eu

    I've used it on many a stripped screw and allen head, and it's amazing stuff. Grips like a mad thing. Everyone's tool kit should have a little bottle of this.

    Good luck!
    Svend
    Interesting stuff Svend, never come across that before.
    'I'm not crazy, my mother had me tested'

  9. #19
    Join Date: Oct 2017

    Location: Ontario, Canada

    Posts: 570
    I'm Svend.

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    Steve, this stuff has saved me hours of aggravation trying to get stripped screws and allen bolts out. I now reach for this at the first sign of trouble. One small drop is all it takes. Highly recommended!

    Edit: just checked, and it's available on Amazon UK for 6.50 gbp

  10. #20
    Join Date: Jun 2014

    Location: Chorley Lancs

    Posts: 1,579
    I'm Steve.

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    I think I can make room for it in my van. It can go on the "only need it 1% of the time, but when I do I need it 100%" shelf.
    'I'm not crazy, my mother had me tested'

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