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  1. #1
    Join Date
    May 2011
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    Default Removing sheared bolts

    We've probably all come across the situation of a sheared off bolt. This clip shows an easy simple way of centring the drill bit. https://www.youtube.com/watch?v=dJfkCj3FWBs
    Unfortunately, it doesn't show how to do one that has sheared of flush!!!
    Kryn
    To grow old is mandatory, growing up is optional.

  2. #2
    Join Date
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    Default

    Good one , Kryn.

    I see myself on the lathe drilling out a series of cap head bolts for such an eventuality.

    I wonder how hard are the cap heads?

    Grahame

  3. #3
    Join Date
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    Default

    You could use stainless steel cap screws Grahame.
    Chris

  4. #4
    BobL is offline Member: Blue and white apron brigade
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    Default

    Quote Originally Posted by KBs PensNmore View Post
    We've probably all come across the situation of a sheared off bolt. This clip shows an easy simple way of centring the drill bit. https://www.youtube.com/watch?v=dJfkCj3FWBs
    Unfortunately, it doesn't show how to do one that has sheared of flush!!!
    Kryn
    If the bolt is large enough I've been able to grind the top flat and just centre punch and drill a hole in the broken bolt for an easy-out.

    Headaches start when the bolts are small or are broken at an angle just below the surface, then I proceed was follows

    If the part with the broken off bolt contains a number of coplanar bolt holes I have used the gasket, or the opposite side of the part that shows the bolt pattern, to accurately mark and drill out in/on a piece of 1/4" thick steel the position of any two (unbroken) bolt holes. Also mark out where the broken bolt hole is but drill that to suit an easy-out. Then bolt that piece of steel to the two unbroken bolt holes and the broken bolt hole should like up accurately so you can use that as a drill guide to drill a hole in the bolt for the easy-out.

    If there are no other bolt holes available a piece of metal can be sometimes be clamped to the workpiece with the same effect.

  5. #5
    Join Date
    Feb 2003
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    formerly from Sydney (north of The Harbour), NSW, Oz
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    68
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    Default

    Quote Originally Posted by KBs PensNmore View Post
    We've probably all come across the situation of a sheared off bolt. This clip shows an easy simple way of centring the drill bit. https://www.youtube.com/watch?v=dJfkCj3FWBs
    He's using VIX bits !! self centering bits, also used to drill holes for hinge screws.

    Kryn, thanks for sharing
    regards from Canmore

    ian

  6. #6
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    Default

    What do you mean, the wording is all around the place, if new australian I apologise.

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