broken chain mystery

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lee
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Re: broken chain mystery

Post by lee » 12 Apr 2015, 16:06

Got a pic of the same link from the side?

It looks like it had fractured a while ago by the corrosion on the exposed metal?
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SMUDGER
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Re: broken chain mystery

Post by SMUDGER » 12 Apr 2015, 16:07

Looks like that's a tight spot on chain where there is very little movement and its stressed
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lee
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Re: broken chain mystery

Post by lee » 12 Apr 2015, 16:36

SMUDGER wrote:Looks like that's a tight spot on chain where there is very little movement and its stressed
Were you the kid at school who copied off everyone? :lol:
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Re: broken chain mystery

Post by SMUDGER » 12 Apr 2015, 16:38

lee wrote:
SMUDGER wrote:Looks like that's a tight spot on chain where there is very little movement and its stressed
Were you the kid at school who copied off everyone? Image
Haha I don't read other ppl comments lol
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lee
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Re: broken chain mystery

Post by lee » 12 Apr 2015, 17:13

SMUDGER wrote:
lee wrote:
SMUDGER wrote:Looks like that's a tight spot on chain where there is very little movement and its stressed
Were you the kid at school who copied off everyone? Image
Haha I don't read other ppl comments lol
Yeah yeah ...
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ned
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Re: broken chain mystery

Post by ned » 12 Apr 2015, 18:18

[quote="lee"]Got a pic of the same link from the side?

It looks like it had fractured a while ago by the corrosion on the exposed metal?[/quote
that was my thought.
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Dooffle
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Re: broken chain mystery

Post by Dooffle » 12 Apr 2015, 22:15

Doubtful that corrosion would have caused the failure, unless it was very badly pitted. It's also possible that acid cleaning has compounded a slight flaw in the material.

Was it the soft link (joining link)? If so it is likely that a stress fracture was caused buy the link being peened.
The pin looks in good condition so unlikely to be caused by a tight link. The cause could also be from a single high force incident ie sudden impact.
Could have been a small inclusion in the material.
Without a good look at the fracture face to asses the type of break it's hard to say.
PS this is the sort of thing I do for a day job.




Last year I had an expensive chain (£120) break, clean through a link, stress fracture. Nowhere near the soft link.
Bought a chain for £60 due to emergency, I have only just adjusted it after 2.5k miles, including 2 trackdays.
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Cabernet
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Re: broken chain mystery

Post by Cabernet » 13 Apr 2015, 06:44

I love ❤ my shaft.
A Kentish man living in Manchester.

"As soon as he (Tozzi) started with the personal remarks I assumed he was struggling with the rest of his case", Ross Brawn 2009,
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pch1
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Re: broken chain mystery

Post by pch1 » 13 Apr 2015, 10:18

Dooffle wrote:
face to asses...
PS this is the sort of thing I do for a day job.

Face to arses? Don't think I'd like your job mate, sounds a bit shit if you ask me lol

Viva BMW shaft drive \o/
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Re: broken chain mystery

Post by pch1 » 13 Apr 2015, 10:19

Cabernet wrote:I love Image my shaft.
Dirty buggerer, although you should have written "I love to get shafted" ha ha ha
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