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Thread: Lock Wire

  1. #1
    Join Date
    Feb 2007
    Location
    Billericay, Essex, England.
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    834

    Lock Wire

    Simple question but can't find the answer anywhere.

    What size lock wire is used for diff mounting bolts, calipers etc??

    Many thanks

    Sean
    Too many idiots, not enough villages!

  2. #2
    Join Date
    Feb 2013
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    Surrey
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    178
    I'd use at least 20 swg (0.036",0.914mm). You could go bigger,19 or 18 swg, but I think 20 swg is plenty strong enough.
    DAX Cobra MK3 chassis, MK4 shell. RV8.

  3. #3
    Join Date
    Mar 2014
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    Aerospace standard is 0.8mm. That’s what I’ve used.
    AK Gen II - Delivery May '15

  4. #4
    Join Date
    Feb 2007
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    Billericay, Essex, England.
    Posts
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    Thanks both for your feedback.

    I've measured what Dax have used when they installed the diff and it appears to be approx. 0.7mm.

    Think I'll step up slightly to around 0.8mm

    Now, 9" pliers or 6" pliers??

    Sean
    Too many idiots, not enough villages!

  5. #5
    Join Date
    Sep 2014
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    aberdeenshire Scotland
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    6" every time, much nicer to use, and that is backed up with 43 years as a Helicopter enginer.

    Cheers
    Shuggie

  6. #6
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    Perfect!

    Sean
    Too many idiots, not enough villages!

  7. #7
    Join Date
    Oct 2005
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    Cape Town, RSA
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    127
    Don't worry too much about the wire diameter. The bolt is tight from torqueing it, the wire keeps you from losing it (as in turning out and dropping on the street) - not loosening it. I hope the heli engineer agrees with me, a Can Am mechanic of 20 years
    Nothing is as it seems...

  8. #8
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    Mar 2014
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    Quote Originally Posted by dominik View Post
    Don't worry too much about the wire diameter. The bolt is tight from torqueing it, the wire keeps you from losing it (as in turning out and dropping on the street) - not loosening it. I hope the heli engineer agrees with me, a Can Am mechanic of 20 years
    Please tell me you're joking???

    If the lockwire only stops you from losing the bolt then I'm afraid you've antilocked it! The lockwire should be tight enough to prevent the bolt moving.

    Hope the Helicopter engineer agrees with a 20 year fixed wing engineer?
    AK Gen II - Delivery May '15

  9. #9
    Join Date
    Feb 2013
    Location
    Surrey
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    178
    I have to agree with Richie. I too am a licensed aircraft engineer. Locked means locked.

    Quote Originally Posted by Richie View Post
    Please tell me you're joking???

    If the lockwire only stops you from losing the bolt then I'm afraid you've antilocked it! The lockwire should be tight enough to prevent the bolt moving.

    Hope the Helicopter engineer agrees with a 20 year fixed wing engineer?
    DAX Cobra MK3 chassis, MK4 shell. RV8.

  10. #10
    Join Date
    Apr 2005
    Location
    Worcestershire
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    1,979
    I'm a licensed dog walker and Stella drinker, I've never fitted a lock wire to anything and I have two IVA badges on my swimming trunks.
    Regards

    Craig Perry

    No, I'm not "repairing" it, I'm fine tuning its performance.

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