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 How to extract a snapped head bolt..

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mynameismud76



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PostSubject: How to extract a snapped head bolt..   Wed Jun 30, 2010 3:16 am



Hi guys,

Snapped a head bolt on a 4 bolt head. There's nothing poking out..it's quite someways down there.

I'm thinking about drilling it out, but doubt I can do it without knackering the thread.

There's this tap bit that unscrews a screw as you tap the thread..what's that tap called?

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YANTO
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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 4:29 am

Try PM'ing Mark fella...

He's got allsorts of voodoo black magic trickery type stuff in his toolbox rofl

Unfortunately, I don't have a spare 4 bolter knocking about

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mynameismud76



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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 4:39 am

Cool, cheers buddy. It be sweet if he has..he's just down the road from me.

She still runs, just 3 bolt..LOL.
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WOL

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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 5:10 am

In which case, just run it til its dead lol

If you get a reverse drill bit (don't know what they're called lol) but they drill into the core of the bolt then they grip and the bolt begins to unthread out of the hole, very clever really GOOD

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mynameismud76



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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 6:02 am



Hi Wol!! =)

Ya, gonna have to get one of those as well..read from the post Jay sent that sometimes, the reverse drill bit is all that's required.

Cheers for the info =)
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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 7:37 am

Well your more than welcome to pop on down Mud an we can see what we can do for you

I have got some stud extractors (3 sets actually lol whistling)

But they may struggle with it being a high tensile head bolt

You may get lucky if its left a stump out of the head (ive had one do that to me), you can remove the head an then clamp some good mole grips on it an twist it out

We can only try GOOD

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mynameismud76



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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 8:22 am



Oo man, cheers for that..might have to take you up on it =)

Perhaps I shall take the head off (if possible) and assess the damage. It may be like you say, just a mole grip job.

As it is (witht the head on it) there's nothing poking out the top, and the bit that snapped off has around 5 or 6 rings of thread on it. There might be around 10mm of the bolt left in the crank case.

If I need to pop over, what time will be good for you?
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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 8:40 am

mynameismud76 wrote:


Oo man, cheers for that..might have to take you up on it =)

Perhaps I shall take the head off (if possible) and assess the damage. It may be like you say, just a mole grip job.

As it is (witht the head on it) there's nothing poking out the top, and the bit that snapped off has around 5 or 6 rings of thread on it. There might be around 10mm of the bolt left in the crank case.

If I need to pop over, what time will be good for you?


Anytime bud GOOD

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mynameismud76



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PostSubject: Re: How to extract a snapped head bolt..   Wed Jun 30, 2010 8:57 am



Cool, cheers.

I shall holler when I've got the head off.

I'll either be asking if you've a head bolt, or on my knees balling...lol.
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mynameismud76



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PostSubject: Re: How to extract a snapped head bolt..   Fri Jul 02, 2010 9:21 am



Got the FTX put back together. A great big thank you to Mark for all the help =)

Broke the clutch bell days before, and broke another today.

A guy has mentioned he's quite sure that the chasis flex could be a cause, hence recommended alloy chasis or a full metal roll cage.

What's happening in the chasis flex that's breaking the clutch bells? First clutch bell broke where the shaft goes into the bell, and the second one snapped in the middle of the shaft (right in between the two clutch mount bearings).

It'd be great to know if chasis flex is causing this, instead of throwing clutch bells at it!! LOL

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PostSubject: Re: How to extract a snapped head bolt..   Fri Jul 02, 2010 10:03 pm

your very welcome fella ........... ANYTIME GOOD


Chassis flex 'COULD' be the reason

Have others been complaining of the same thing ??


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PostSubject: Re: How to extract a snapped head bolt..   Fri Jul 02, 2010 10:55 pm

Chassis flex would put unwanted tension on the bell, and at high speed would cause the bell to give in I guess

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PostSubject: Re: How to extract a snapped head bolt..   Sat Jul 03, 2010 12:42 am

HOSS wrote:
your very welcome fella ........... ANYTIME GOOD


Chassis flex 'COULD' be the reason

Have others been complaining of the same thing ??


wol wrote:
Chassis flex would put unwanted tension on the bell, and at high speed would cause the bell to give in I guess



Cool, just going to get another clutch bell. Need it anyhows.

Yes I can see how the chasis flex can cause alignment to go out and stresses the clutch bell.
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