7 Comments

  1. Jose G Garcia
    October 12, 2017 @ 8:42 PM

    I vote aluminum all the way, wish the axles were aluminum tubing as well. Galvanized is good but still rusts away in time.

    Reply

  2. Clarence Alexander
    July 19, 2018 @ 6:56 AM

    I have doubts about the illustration for the Double Eye Leaf Spring being correct. Usually DE Leafs are used on twin axles with a rocker bracket in between to share the load between the 2 leafs. The way it is shown will cause an extremely high resistance to flexing under load. For the indicated single axle application a Single Eye with Slipper may be better.
    Now you will have to re-argue your case and redo the FEA.

    Reply

    • The Mechanic
      July 19, 2018 @ 7:30 AM

      Excellent observation. I wondered who would point that out first. Congrats! What you don’t see are the FEA constraints allowing the back bracket to slide so it does not bind (or “high resistance to flexing”) effectively making it a slipper as you mention. It simplifies the FEA because we’re not trying to study the spring or mechanism, only forces on the frame. You are right, the analysis is not perfect, but it’s good enough to highlight the point. Thanks for reading.

      Reply

  3. Roni Sumich
    August 4, 2018 @ 10:53 AM

    Looking to order a goose neck 20 ft 7000 lbs axles. Trying to decide what axle to use. The trailer will be loaded to the max 11,000 lbs evenly loaded over the length of the trailer. Was leaning to a torsion axle but now am more confused if it will be the best choice. Thanks for the article it has great info. Just not sure which is the best way to go, any advise would be appreciated.

    Reply

    • The Mechanic
      August 13, 2018 @ 8:32 AM

      Hey thanks for the question. The only successful multi-torsion axles I have seen are light loads. They don’t share the load, so one axle is always more loaded than the other, and I have heard terrible stories about tire failures, etc.. I would much rather see springs with some rubber damping for some of the effect, but still have full load sharing. I like torsion axles a lot for the right application — not so much here. Good luck with your project.

      Reply

  4. Trix Gaimo
    August 19, 2018 @ 8:37 PM

    Educational article. I plan to build a trailer for a 20-footer shipping container van (about 3,500 kg) which will be modified into a living space (tiny house). What do you recommend, a spring or torsion type? Thanks.

    Reply

    • The Mechanic
      August 22, 2018 @ 10:14 AM

      For that weight, I’d do a tandem set of axles using leaf springs. Good luck with your project!

      Reply

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