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Removing anchor bolts that were hammered in the wrong way!

Discussion in 'General DIY' started by Tom Arrandale, 18 Oct 2020.

  1. Tom Arrandale

    Tom Arrandale

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    Hi all

    I got some carbon steel shield anchor bolts from b&q to install a pull up bar on an external wall.
    https://www.diy.com/departments/diall-carbon-steel-shield-anchor-l-105mm-pack-of-4/1517972_BQ.prd

    Got a friend round to install it. Holes drilled, anchor bolts all hammered in, started screwing in the bolts and realised they were in the wrong way.

    Has anyone had experience removing these? My friend thinks he can drill into it and pull it out but i'm not so sure given how tight they were when getting hammered in.

    Help/advice will be appeciated.
     

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  3. flameport

    flameport

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    Drill new holes, and get a new friend to fit new bolts into them.
     
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  4. Mottie

    Mottie

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  5. johnny2007

    johnny2007

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    How can they be in the wrong way?
    Did he bang the bolt heads in the (oversized) hole????
     
  6. Keithmac

    Keithmac

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    Surely you'd have to have the bolt partially installed so the tapered cone wouldn't fall out?.

    You've got a cat in hells chance of drilling that out and having a usable hole at the end of it.
     
  7. Alec_t

    Alec_t

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    Try unscrewing the bolt a few turns, then hit the head in. That should remove the sideways force which the cone exerts and enable the bolt assembly to be withdrawn using a bit of leverage under the bolt head.
     
  8. johnny2007

    johnny2007

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    From what i understood he banged the bolt in, head first, so the cone is now sticking out.
    Hopefully I misunderstood...
    Pictures please.
     
  9. Keithmac

    Keithmac

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    That's what it sounded like to me too.
     
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  11. whall3y

    whall3y

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    Yes, I really want to see those pictures.... o_O
     
  12. Munroist

    Munroist

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    (is that mackay out of porridge?)
     
  13. whall3y

    whall3y

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    Excellent comparison... A great episode from a great BBC series.... Yes it was Fulton Mackay.
     
  14. Keithmac

    Keithmac

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  15. Munroist

    Munroist

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    Still puzled as to what the OP has done - I'm wondering if they have knocked the sleeves in without the bolt, I can't think how else you could do it wrong - they can't have knocked it in the wrong way around!
     
  16. whall3y

    whall3y

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    They are shield anchors so I would have expected them to be tapped in without the bolt. Just looks like they have been tapped in the wrong way around.
     
  17. johnny2007

    johnny2007

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    The conical nut would fall off without the bolt.
     
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