drilling out bolts...

Started by Archbish, June 28, 2006, 08:23:24 AM

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Archbish

Quote from: Adriansturgess^^^^No but I\'ve used a left handed screwdriver.....
*sigh*

Had a girlfriend once that was left handed.  Looked most uncomfortable during certain activities...
Everyone wants to be like ArchBish,
Cos the Bish is never glum.
Its hard to be unhappy
when the sun shines out your bum

Grizzly

Are they Nutserts or captive nuts?

If you look at the nut part (the bit fastened to the car) does it look like an Insert (does it have like a washer part protruding) or is it a captive nut (all you can see is the broken bolt stuck out)?

If its a Nutsert you can grind the head off it and drop it into the box section and it should drop out the drain hole. or if its a Captive nut you could get a dot punch and knock it through with a Big hammer then ither way you could use a Nutsert to replace the thread.

Grizzly

Quote from: richard cashi had a similar problem with something but i got quite far in then then drill bit snapped, how the hell do you drill a drill bit??
Its very hard to get a Broken drill/Extractor out, the only way that realy works if its not to far in is to Shatter it with a Dot punch and a hammer.

grinder

Quote from: GrizzlyIts very hard to get a Broken drill/Extractor out, the only way that realy works if its not to far in is to Shatter it with a Dot punch and a hammer.

brute strengh , stupidity and a big hammer works a treat to be honest

i snapped a bolt on the wing on mine aswell - so i just cheated and welded the wing back on :D


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Jonathan_F

Bish.
You are going to need at least a 6mm drill and extractor. You can try drilling a pilot hole about Ø2mm but I would take it steady with a 7 or 8mm drill. Use the slowest speed and apply plenty of pressure evenly. There will likely be hard parts in the steel of the bolt. Use grease as lubricant and carefully re-sharpen the drill on a bench grinder. (WD40 is too thin unless someone is stood constantly spraying it)
An alternate method is to drill Ø8.5 bang on down the center and tap out the old threads.
Patience on the drilling and you shouldn\'t break anymore.

Good luck.
Jon

Archbish

cool - cheers guys...  I\'ll give it a whirl...
Everyone wants to be like ArchBish,
Cos the Bish is never glum.
Its hard to be unhappy
when the sun shines out your bum

Rx-7 turbz

you know any sparkys/pipefitters get a cutting compound off them, i have cuts holes through steel girders with a 32mm hole saw so shouldnt have to much trouble