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Brake stop torn off

dnrcdnrc Posts: 159
edited July 2010 in Workshop
Hi all, i've got a little issue.

I bought a second hand bike recently and have been replacing bits and stripping/rebuilding it.

Part of this was replacing the brake cables.

Problem is, the end of the old cable in the cable stop at the back end of the top tube was stuck in pretty good and in trying to get it out this happened:

dscn0226small.jpg

Oh censored ! it's not come right off but i'm not best pleased obviously.

Is the frame likely to still be OK? What's going to be the best approach to repair it?

I was thinking epoxy or liquid metal??

Any input appreciated.[/img]

Posts

  • Smokin JoeSmokin Joe Posts: 2,706
    They were only fixed to the tube using silver solder as far as I know and provided you cover the bare metal with paint there should be no damage. It should be easy to find a band on cable guide on the web or in the spares box of a long establised LBS and just run the outer casing the full lenght to the caliper.

    That's how it was done till well into the seventies when braze ons took over.
  • Weejie54Weejie54 Posts: 750
    Is that actually a hole underneath?

    If so, you would be better getting a patch brazed in before covering with paint.
  • Monty DogMonty Dog Posts: 20,614
    What's the frame material? If it's aluminium alloy, frame is very difficult to repair - a weld repair will change the material propoerties and it will probably lead to a fialure at some point in the future. For steel, a framebuilder might be able to run some braze in there - but it will still be a weak point - some would suggest sweating in a new toptube. If it was me, I'd try and repair it with aluminium-filled epoxy and keep an eye on it.
    Make mine an Italian, with Campagnolo on the side..
  • Weejie54Weejie54 Posts: 750
    It does actually look like aluminium. Question would be as to whether there is corrosion at that point. Epoxy may be the only solution.
  • John.TJohn.T Posts: 3,698
    If that is a hole and the frame is aluminium then I think it is done for. It looks as if it has been bodged before.
    My Fleet.
  • dnrcdnrc Posts: 159
    it is aluminium. there was previously corrosion there, i guess that's why it was so hard to get the old cable end out.

    Is it ruined?? I've not had the thing a week!
  • Weejie54Weejie54 Posts: 750
    Probably best to ask a framebuilder. One who does aluminium repairs:

    http://www.daveyatescycles.co.uk/
  • White LineWhite Line Posts: 887
    I'd try removing the cable stop, then filing the hole so that it's nice and round so there are not sharp corners for stress to build up. Then fill it or cover it somehow.

    It'd still be risky to ride, but would have less chance of cracking. :?

    I'm sure if Redddraggon sees this he'd have a more informed opinion.

    Best of luck though. Hope you get it sorted. :)
    Emiliana the CAAD9
  • gethmetalgethmetal Posts: 208
    As a welder/fabricator by trade, I'd scrap it.
  • Monty DogMonty Dog Posts: 20,614
    You'd never be able to weld it if it's aluminium - you'll blow some nice holes in it though!
    Make mine an Italian, with Campagnolo on the side..
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