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PostPosted: Tue Jun 05, 2012 5:00 pm 
Dirt Disciple

Joined: Fri May 25, 2012 12:09 am
Posts: 10
Location: Northern Ireland (near Belfast)
Hi there!

Two weeks ago, I finally decided to do what I had been planning for years, to refurbish my 1994 Orange Clockwork.

About 1999 I managed to separate the drive side chain stay from its dropout. I welded it (TIG IIRC), rebuilt it and happily rode it for another year or so before moving onto another bike build - but it’s been at the back of my mind ever since.

I found lots of spares, my old Deore LX groupset (in great condition!), Onza bar ends and a pair of Pace RC35s that need some TLC.

Moist with anticipation I retrieved my old frame from its resting place in my parent’s garage and brought it back to mine. The plan was to strip and tidy the frame before leaving it in to be powder coated in something tastefully citrus.

Image

Closer inspection revealed the cold flaccid truth…

On the bottom of the chain stay, just after the weld, there is a small crack all the way through the tubing. Apparently my annealing/stress relieving skills weren’t up to much.

Image

I did a quick tidy job on the weld area and was able to trace the crack most of the way around the tube. The crack becomes quite shallow around the top of the chain stay and gradually fades out. I’m not confident about finding the exact start/stop points of the crack so that I can drill a couple of holes (to prevent further propagation).

Image

I’m thinking about getting the frame TIG welded again by sombody else but I’d quite like some advice on how best to proceed. Should I first try to carefully force the crack into completion so that it can’t propagate under the weld? After the weld, what is the best way to relieve stress\anneal the stay so that I am not faced with the same type of failure again?

The other issue that may well be the end of it all is the two massive dents on each chain stay beside the bottom bracket tube. I don’t remember these happening, they look like hammer dents! :(

Image

Can the dents be safely filled with some low temperature brazing? Or is this a rear triangle disaster waiting to happen?

The frame has sentimental value for me, I’d really like to get it fixed up and safe to ride – is it a lost cause?

I suppose option number two is an orange and white rattle can job and retirement to my wall of broken dreams…


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PostPosted: Tue Jun 05, 2012 7:32 pm 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
Posts: 6843
Location: Nth Somerset, UK
Depending on where in the world you are, you may well have a specialist frame builder within sensible distance, and as your frame is steel, then there is every chance that it can be repaired, although how far you want to go will depend on the depth of your pocket and the price you put on sentimental value.

If you tell us your location, I bet someone here will know a local engineer who can make things good.


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PostPosted: Tue Jun 05, 2012 8:10 pm 
Dirt Disciple

Joined: Fri May 25, 2012 12:09 am
Posts: 10
Location: Northern Ireland (near Belfast)
My pockets are fairly deep, but that's more to do with exit holes left by money burning its way out again. ;)

Currently I'm in Northern Ireland (near Belfast).

I did look at one frame builder's web site, to replace both stays. I could have nearly bought two second hand clockworks for what he was charging.

But I will definitely consider a professional if the price isn't too high. Any recommendations would be appreciated.


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PostPosted: Tue Jun 05, 2012 8:19 pm 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
Posts: 6843
Location: Nth Somerset, UK
Dillinger wrote:
My pockets are fairly deep, but that's more to do with exit holes left by money burning its way out again. ;)


Ahhh yes, Retrobikers know that feeling well. :wink:


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PostPosted: Wed Jun 06, 2012 1:36 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Fri Feb 06, 2009 11:13 pm
Posts: 9719
Location: Skipton
Tough one really as if you're planning on a re-paint it'd be easy enough to pick up another Clockwork frame that isn't damaged. Saying that, it won't be your original one :?


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PostPosted: Wed Jun 06, 2012 3:45 pm 
Retro Guru
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Joined: Fri Jun 12, 2009 11:58 pm
Posts: 801
Location: Quantocks
A good framebuilder could easily sort that, though tbh a warning about the ultimate strength left in the end of the chainstay would be expected. But doable imo.

As has been said, another clockwork frame & refinish would be a better bet really & maybe just laquer up your repair & hang it on a wall for keeps sake.


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PostPosted: Wed Jun 06, 2012 4:00 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader

Joined: Sat Jul 21, 2007 9:48 am
Posts: 6976
Location: Bristle
you can easily get another clockwork frame for not much more than a framebuilder will charge to fix that


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