Broken Rear Axle

Discussion in 'Bicycle Repair' started by LR Jerry, Mar 14, 2015.

  1. LR Jerry

    LR Jerry Well-Known Member

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    A few months ago the rear axle broke in my Staton Inc hub. It broke where the snap ring groove is. So I had David redesign me a new axle. The new axle no longer has snap ring grooves. Instead it now uses sleeves to hold the sealed bearings in place.
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    Last edited: Mar 14, 2015

  2. LR Jerry

    LR Jerry Well-Known Member

  3. LR Jerry

    LR Jerry Well-Known Member

  4. LR Jerry

    LR Jerry Well-Known Member

    I'm now running a 7 speed 34-13 rear freewheel. The 18.75 reduction gear box has 17t gear on it which runs to a 44t gear on the shiftkit. This drives a 34t chainring which drives the rear freewheel. Reduction range is 48.53-18.56. The new axle and gear setup has been working great. All gears are shifting up and down automatically very smoothly.

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    Last edited: Mar 14, 2015
  5. currentresident

    currentresident New Member

    Ask him what it was made of. Axles typically use 4140 steel which is slightly stronger than the 4130 steel used in frames. There is a company which makes screws out of Aremet 100 which has a tensile strength of 300000 psi rather than the 120000 psi of 4130 with comparable enlongation. There is a market for custom axles if wants to make them.
  6. LR Jerry

    LR Jerry Well-Known Member

    The Staton-Inc Axle is CNC machined out of 41L42 CRS and zinc plated. In defense of what is standardly sold with the Staton hub, I was told I'm the first to have reported breaking one in the company's 32 year history. I rode on it for two years before it broke. In my case I'm 250 lbs and live in the mountains of Tennessee. We have up to 30% grade hills here. Also with any real hard material score lines weaken it at that point. Glass cutters actually do controlled breaks using score lines. I believe this is more of the reason it broke. David already does custom machining all you have to do is let him know what it is you want.
    Last edited: Apr 4, 2015