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  1. #1
    ptscon's Avatar
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    Question Bunk brackets, vertical or on angle?

    When attaching bunk swivel brackets to a trailer frame with u-bolts are the brackets supposed to be totally vertical or on an angle.

    Also, the brackets have little dimples that I think are supposed to bend in once torqued to prevent slipping on the frame. Am I understanding this right? If I torque a 3/8 ubolt to spec, which is about 31-ftlb, it's not enough to have any effect on those dimples and eventually the bracket will tilt over a bit since there's a bit of free space between the ubolt and frame.



  2. #2
    Click avatar for tech links/info K447's Avatar
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    I would expect the dimples are to provide traction against the metal of the trailer frame, so they would remain raised and press into the surface of the frame metal for grip.

    I have seen these sort of brackets mounted vertical and I have seen them mounted at right angles to the hull surface. I tend to lean towards having the bunk brackets mounted perpendicular to the hull surface (and therefore also perpendicular to the bunk bottom surface). The hull weight will press downwards while the hull V shape will tend to press the bunks outwards. Angled bracket mounts would resist both forces.

  3. #3
    ptscon's Avatar
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    Hmm ok, think I will switch over to 1/2" u-bolts either way ..torque spec jumps from 31 to 75 when using 1/2, 3/8 one just doesn't feel right for a heavy 4-stroke ski.

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