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Thread: trailer axle U-bolts - what steel?

  1. #1
    Join Date
    Oct 2002
    Location
    Kirkland, Washington
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    2,088

    Default 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. #2
    Join Date
    Aug 2007
    Location
    Custer WA
    Posts
    583

    Default

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

    Some info.....


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

  3. #3
    Join Date
    Aug 2018
    Location
    Loveland,CO
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    123

    Default

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

  4. #4
    Join Date
    Jul 2017
    Location
    Buffalo NY USA
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    312

    Default

    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

  5. #5
    Join Date
    Jan 2003
    Location
    On the Oil Coast,USA
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    19,383

    Default

    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!

  6. #6
    Join Date
    Oct 2002
    Location
    Kirkland, Washington
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    Default

    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

  7. #7
    Join Date
    Dec 2009
    Location
    Stevens Point, WI
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    8,043

    Default

    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

  8. #8
    Join Date
    Jan 2014
    Location
    In the desert
    Posts
    1,273

    Default

    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.

  9. #9

    Default

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

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