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| Pete. |
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Pete.
Super Spammer
Joined: 22 Aug 2006
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 Posted: 14:21 - 10 Apr 2016  Post subject: Broken stud extractor - how to remove. |
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I helped a guy today who had a broken-off stud extractor stuck in an exhaust stud. These are too hard to drill so I used an old machinist's trick for removing busted centre drill ends.
I took a 11mm diameter centre drill with a broken end and ground it as shown below. I also made a drilling guide to keep it aligned central over the broken stud.
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a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good  |
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| Pete. |
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Pete.
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Joined: 22 Aug 2006
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Posted: 14:25 - 10 Apr 2016  Post subject: |
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Used the tool to drill over the top of the stud extractor which was sheared off below surface. I cut as much of the ally out from around the stud as I could, even hit the stud with my welder to melt the top down a bit to gain a bit of extra depth.
Once it was cored out as far as I could I built the top of the stud up with weld.
____________________
a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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| Pete. |
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Pete.
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| Posted: 14:28 - 10 Apr 2016 Post subject: |
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Once the weld was high enough I welded a nut to it and with all the heat involved it screwed out easily with a spanner.
The drilling guide did a great job and there was plenty of thread left so I just made an extended stud to go into the original thread.
Done start to finish in about 2.5hrs.
____________________
a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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| ondabike |
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ondabike
Borekit Bruiser
Joined: 01 Apr 2016
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Posted: 14:31 - 10 Apr 2016  Post subject: |
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Excellent demo Pete, will try that if I have to  |
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| zzpza |
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zzpza
Derestricted Danger
Joined: 10 Feb 2015
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| Posted: 14:50 - 10 Apr 2016 Post subject: |
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Impressive work, not sure I have the skill to manage that!
I've been waiting for an opportunity (hopefully on none of my bikes) to try this method:
https://www.youtube.com/watch?v=fqZYgReuywM |
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| Islander |
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Islander
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Joined: 05 Aug 2012
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| Posted: 15:18 - 10 Apr 2016 Post subject: |
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It's an old watch/clockmakers trick and it does work. It's a lot slower than Pete's method though |
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| Pete. |
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Pete.
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Joined: 22 Aug 2006
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Posted: 16:00 - 10 Apr 2016  Post subject: |
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| Islander wrote: |
It's an old watch/clockmakers trick and it does work. It's a lot slower than Pete's method though |
Also couldn't be done in place. The guy had already removed the cylinder head but I could have done it in place though it would have been a lot more awkward.
The best bit about this was I didn't have to use a lathe or mill, just an angle grinder, battery drill and welder so it's possible for anyone with those tools, all you have to do is get hold of a centre drill which are pretty cheap.
____________________
a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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Old Thread Alert!
The last post was made 9 years, 295 days ago. Instead of replying here, would creating a new thread be more useful? |
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