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trailer axle U-bolts - what steel?

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  • trailer axle U-bolts - what steel?

    I'm building a trailer. It's looking like I may need to make my own U-bolts. Are these special steel? It's pretty important that they not fail.

    Do you know what kind of steel I should use?

    I'm stumped.

    metalmagpie

  • #2
    There are places around that make u-bolts cheap. Probably not worth doing yourself.

    Some info.....


    http://gittspring.com/measuring-support/

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    • #3
      Northerntool, $25 for set of 4, with two mounting plates, for 3" , 6'000 # axle, plus other sizes.

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      • #4
        Much of the higher-grade automotive stuff is just a medium carbon such as 1045, although later models (last 20 years) have some bits of 4140

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        • #5
          Dozens of places online-

          https://www.dsuban.com/custom-u-bolts/

          They are usually medium carbon steel like mentioned already,but also feature rolled threads which will be 20-25% stronger than cut threads.
          I just need one more tool,just one!

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          • #6
            Yes, I can order custom u-bolts. But I don't see why I should.

            I think I'll just make some with 1045 rod.

            metalmagpie

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            • #7
              Recently I built a trailer and needed U-bolts of an odd size. Found a local place like mentioned that made them on the spot for $7 each with nuts and washers.
              Andy

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              • #8
                Last ones I made I used 4140 because I had it on hand.
                *** I always wanted a welding stinger that looked like the north end of a south bound chicken. Often my welds look like somebody pointed the wrong end of a chicken at the joint and squeezed until something came out. Might as well look the part.

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                • #9
                  Most towns have a place that specializes in commercial truck suspensions and springs. They can custom make them for you.

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