US-sized washers in UK or spare Cantilever yoke?

Discussion in 'Bicycle Mechanics and Repairs' started by Hawk, 11 Jul 2012.

  1. Hawk

    Hawk Well-Known Member

    Location:
    Bearsden, Glasgow
    I've lost a washer off my brake system. It is used to clamp my main brake cable at the yoke on my cantilevers, so I prob can't do without it.

    Unfortunately, this is a US designed bike and so uses a washer that I have worked out is a US size, it's 1/4" washer of the SAE standard.

    I'm finding it really difficult to track down a washer in this size in the UK.
    It's internal diameter is 7.14mm. The commonly available UK sizes are M6 which is around 6mm internal and M8 which is around 8mm internal.

    Does anyone know where I can track one of these down? Perhaps I could get away with drilling, say, an M6 to a slightly larger size?

    Alternatively, how hard would it be to track down a new cantilever yoke assembly?

    Cheers
    Anton
     
  2. sidevalve

    sidevalve Über Member

    Almost all the old imperial bolt [and therefore washer] sizes are still available from engineering suppliers. You're problem will be in finding a small quantity [assuming you don't actually want 999 spares]. You have two options 1 - open out an M6 [a small file might be easier than a drill but you will need a small vice of some sort to hold the washer]. 2 - try your local model engineering shop [NOT toyshop] they will have dozens of sizes from metric to imperial to BA and one of them WILL fit.
     
  3. TheDoctor

    TheDoctor Resistance is futile! Moderator

    Location:
    Stevenage
    If all you need is a Canti yoke, they're dirt cheap and easily available.
    PM me your address, I'm sure I've got a spare one.
     
  4. TheDoctor

    TheDoctor Resistance is futile! Moderator

    Location:
    Stevenage
  5. rollinstok

    rollinstok Well-Known Member

    Location:
    morecambe
    An engineers merchant will probably give you a couple of 1/4" washers.. check the thickness of the washer too as they are available in a few different patterns
     
    Hawk likes this.
  6. OP
    OP
    Hawk

    Hawk Well-Known Member

    Location:
    Bearsden, Glasgow
    Yes, actually! My LBS specialise in high performance parts and the cheapest they had was £8-10 or so!!

    Currently improvising with an M8 washer but that's definitely not a permanent solution
     
  7. TheDoctor

    TheDoctor Resistance is futile! Moderator

    Location:
    Stevenage
    Well, that one was £5.99 in a Halfords near you.
    I do have an old one - I'll get it in the post tomorrow.
     
  8. OP
    OP
    Hawk

    Hawk Well-Known Member

    Location:
    Bearsden, Glasgow
    Legendary.
     
  9. US designed bike????
     
  10. OP
    OP
    Hawk

    Hawk Well-Known Member

    Location:
    Bearsden, Glasgow
    It's a Specialized (tricross), so designed in the USA and built in Taiwan I believe. Why is this surprising??
     
  11. Well, because, unless it's something old and/or unusual it'll be Metric not Imperial. And built using Japanese parts. The fact that it was 'designed in the USA' isn't really relevent.

    I was kinda hoping you had something rare and exotic.....
     
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