Rusted bolts

Discussion in 'General DIY' started by amwc, 15 Feb 2010.

  1. amwc

    amwc

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    Hi
    I need to drill out some rusted bolts from a cast iron housing the bolts dont go all the way through though so I'm a bit worried about doing it myself just wondering if anyone knew who was the right trade to take this problem too?
     
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  3. gorgeousgordy

    gorgeousgordy

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    Can you describe the problem a little deeper and if possible include photos
     
  4. amwc

    amwc

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    Its a door of a cast iron stove the bolts go in from the back and hold the glass in place. whilst replacing the glass the bolts sheared off leaving about 5mm in the door flush with the door . If the bolts went all the way through i'd just wack a drill through them but they only go half way through into the thread thats in the cast iron. I'm not sure how to put a photo on I'll have a go in a bit.

    Thanks
     
  5. gorgeousgordy

    gorgeousgordy

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    You need to get some stud extractors. You drill a small hole on the broken sted and then screw the extractor in but it has a left hand thread so when it grips it starts to turn the stud.
    To be honest if you can get the door off I would take it to my local engineering shop and slip them a tenner.
     
  6. Burnerman

    Burnerman

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    Sykes Pickavant do a set of splined extractors that work very well......a hole is drilled into the sheared stud, and a hardened spline tapped in. A hexagon that fits on the spline is then used to extract the stud.
    These worked perfectly for me when the hexagon of a tapered spark plug snapped off in situ...worth every penny.
    John :)
     
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  8. Bodgeit and scarper ltd

    Bodgeit and scarper ltd

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    your having a laugh
     
  9. gorgeousgordy

    gorgeousgordy

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    My local engineer makes stuff up for me and I pay him in Guiness.
     
  10. dave.m

    dave.m

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  11. Blagard

    Blagard

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    I had a similar problem a long time ago. Because of the limited depth of the stud I found it near impossible to get an extractor to get any purchase on offending stud. ( edit: the stud was also fairly small diameter around 5mm)

    In the end I cleaned up the surface of the stud where it sheared off so I could find the centre as accurately as possible. Then I started to drill it out in progressively larger drill size until I could make out the last remaining bit in the threads themselves. I was able to pick out the coil of thread remanents leaving behind the original thread in the base material. Took a long time but got there in the end.

    As I had two to do! - The second attempt was off centre on the drilling out but I still got out half the thread exposed and the other side then broke free anyway!
     
  12. DIYnot Local

    DIYnot Local

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    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

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