Best way to remove a broken bolt extractor?

Discussion in 'The Garage' started by kirkster70, Nov 30, 2011.

  1. kirkster70

    kirkster70 moto junkie

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    I broke 2) snap-on bolt extractors in one day. Drilling out the hardened steel of the extractor with a common drill bit isn't happening.

    Anyone have a good suggestion on how to extract the extractor??
    #1
  2. griffo1962

    griffo1962 Long timer

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    :ear:ear

    Someone with actual knowledge may pipe up soon but there is a process called something like ed??? something like an arc welder but it disintegrates the bolt/extractor..

    good luck :1drink
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  3. Skippii

    Skippii Milkshakes, my lad.

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    Weld something to what's left of the extractor.
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  4. Skippii

    Skippii Milkshakes, my lad.

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    Carbon arc gouging, maybe? That would get rid of the extractor.
    Same with a Thermic Lance.

    I'd worry that both would be somewhat...um...destructive to the workpeice. I do some to recall there was something else more specifically used for this, now that you mention it, though....something like a modified plasma cutter or something....I can't think what it was called.
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  5. kirkster70

    kirkster70 moto junkie

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    DUH! Why in the world I didn't think of that, I have no idea! Ha Ha! :lol3 I can be the biggest doofus sometimes.

    I did think of giving it a short blast with a plasma cutter but thought better of it. I'm sure I'd do more harm than good.


    Next time I'm on break from work, I'll give the welder a try. Thanks for the idea, Skippii!

    I was thinking along the lines of there might be some sort of diamond tipped drill bit sharp enough to cut the hardened steel that I didn't know about.
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  6. Benesesso

    Benesesso Long timer

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    Carbon arc is destructive? (heh heh) EDM would work, but you don't need it. Either weld something to it or use a carbide burr in a high speed die grinder.

    [​IMG]
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  7. kirkster70

    kirkster70 moto junkie

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    Welding it is. Thanks, Benesesso.
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  8. GreaseMonkey

    GreaseMonkey Preshrunk & Cottony

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    How big is this extractor? My suggestion is using a carbide dental burr in a dremel, but seeing a pic might help form a different opinion. My concern with welding is the risk of welding something to the side, and now you have an easy out welded into the hole. It doesn't even have to be much, like a tiny slag spatter.
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  9. P B G

    P B G Long timer

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    You minimize the risk by welding through a nut. would also help to know if the hardware is in aluminum.
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  10. concours

    concours WFO for 44 years

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    Rocklinizer. At BIG, fancy machine shops everywhere...
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  11. Bounder

    Bounder ExternallyDisplaced

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    Spark erosion?
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  12. willys

    willys Long timer

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    Been here....done this!!!! It works but takes time with very minimal damage to the part. When there isn't enough material close enough to weld to, that is......still a better bet IMHO when dealing with a delicate bike engine, etc.:freaky
    #12
  13. ohgood

    ohgood Just givver tha berries !!!

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    mmm, hope there aren't any bearings or seals between the work an the ground... :eek1

    have you tried an impact driver on the ez out or a left hand cobalt drill on whatever is stuck ?
    #13
  14. slidewayes

    slidewayes slidewayes

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    Electrical Discharge Machine Is the correct way to remove broken drill bits ,taps and other hard tools(ez outs) and not destroy the part you were trying to save in the first place. Find em fast in the yellow pages
    #14
  15. willys

    willys Long timer

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    I should say used a dremel to grind away the stuck part ....but I have also welded one too.:freaky
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  16. TallPaul

    TallPaul Adventurer

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    Once you've managed to get the stud extractor out, throw the set in the bin, they're the tools of the devil! Best way to remove a sheared stud/bolt is either try and weld something on it and wind it out, or if thats not possible, drill it out with a left-hand drill bit, start small & work up.
    #16
  17. ttpete

    ttpete Rectum Non Bustibus

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    AMEN, brother. Every motorcycle forum has these exact same posts, time after time. Nobody pays one bit of attention to them, either. How is it so difficult to understand that a tapered screw extractor is going to expand the bolt and make it impossible to ever move it? A large part of being a good mechanic is knowing when to STOP before making the situation worse, and get expert help.
    #17
  18. griffo1962

    griffo1962 Long timer

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    so many times you see posts like this.... if they had only stopped a few seconds/turns before........:evil
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  19. GreaseMonkey

    GreaseMonkey Preshrunk & Cottony

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    To me the main issue is not that most extractors are tapered (as some aren't) but when a bolt is stuck enough to shear the head off why do people think that something else is going make it wind out of there like some sort of magical key....
    #19
  20. Bruce Caldwell

    Bruce Caldwell Long timer

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    I broke a pinch bolt in one of my fork legs & then broke an extractor off in the remander of said pinch bolt. I used carbide & diamond dental burs in a handpiece I have for artistic uses to slowly grind it away but a dremel would work too.
    #20