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Thread: Jib crane

  1. #26
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    Re: Jib crane

    Name:  IMG_20211128_201851684.jpg
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Size:  92.0 KB Didn't get a lot of time to work on this over the weekend. Cut beam to length, and coped end to weld to hinge tube. Had to drill a couple holes in hinge tube to plug weld in a spacer tube to space the bushings apart. Used schedule 80 2" pipe which is a little loose in the hinge tube. I didn't really want to rely solely on a press fit to keep the bushings from sliding in further. The bushings will protrude an 1/8" on each end of the hinge tube to act as a smoother running thrust surface.
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  3. #27
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    Re: Jib crane

    I would machine a bushing with a flange on one end, this would serve two functions. One would be to keep the bushing from traveling into the tube, the other would be to act as a bearing surface.
    Mike

  4. #28
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    Re: Jib crane

    Name:  IMG_20211128_205645164.jpg
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Size:  105.9 KB Fit up and tacking the hinge tube to beam. Short end of tube will be the top of jib crane.
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  6. #29
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    Re: Jib crane

    Name:  IMG_20211128_214213103.jpg
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Size:  81.4 KB Nothing out of Instagram just .035 hard wire ran hot and fast. Under the stiffener is full welded. Enough fun for one day.
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  8. #30
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    Re: Jib crane

    Quote Originally Posted by leightrepairs View Post
    I would machine a bushing with a flange on one end, this would serve two functions. One would be to keep the bushing from traveling into the tube, the other would be to act as a bearing surface.
    Too late for that, this does the same thing. Also the material I had wouldn't allow for much of a flange. Also with the tie rod there won't be a lot of stress on the pin area. In reality the hinge tube and pin could be shorter as well being a tie rod design. The rise on the tie rod will be less than ideal but keep in mind only a 880 lb max hoist is being utilized.

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  10. #31
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    Re: Jib crane

    Do you have room to add 1/8" nylon thrust washer to spread that load over a wider area? Size it to fit over the bushing you have to prevent (reduce) deformation.
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  11. #32
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    Re: Jib crane

    Quote Originally Posted by _Dom View Post
    Do you have room to add 1/8" nylon thrust washer to spread that load over a wider area? Size it to fit over the bushing you have to prevent (reduce) deformation.
    Bushing is 1.25" approx Id. Just over 2.5" od. I could slip something around it if it needs it as my hinge plates are roughly 4" wide. I don't think I'll need it but it could be done later if needed. In reality if it did deform slightly ( and it would only be the bottom one) it probably wouldn't matter much anyway as there is lots of contact internally on the pin.
    .

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  13. #33
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    Re: Jib crane

    Name:  IMG_20211130_185105450.jpg
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    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

  14. #34
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    Re: Jib crane

    Changed the design some. There is a brace going from the column to the existing beam above where this will mount. I didn't want to remove the brace or loose headroom by mounting this lower. The 45 degree angle will clear the brace and still keep the pivot point on the same axis. Welded it all up last night and didn't get any pictures until after priming. Just Rust-Oleum rusty metal primer put on with a brush. Didn't see any sense in spraying as it's around 35 degrees or so outside and spraying inside is a huge hassle and a major mess.

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  16. #35
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    Re: Jib crane

    I spayed mine and regretted it, as I got yellow on things I didn't won't too

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  17. #36
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    Re: Jib crane

    For bearings I went with large and small taper roller bearings apposed at the bottom to stop any lifting, and 2 large deep groove bearings up top.
    All large bearings are 65mm inner and 100mm outside from memory.

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  18. #37
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    Re: Jib crane

    Sorry forgot photo

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  19. #38
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    Re: Jib crane

    Name:  IMG_20211201_182345153.jpg
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Size:  79.8 KB. Primer wasn't fully dry but good enough to press bushing in. Started good and tool quite a bit of force on the screw of a 24" bessey clamp to press them in. Haven't used cast nylon before so I wasn't sure what to expect. Bushings were 4 thousandths over so a decent press fit. Internal diameter stayed pretty true at 1.253, which should be good for the 1.25 pin
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  20. #39
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    Re: Jib crane

    Name:  IMG_20211201_183045910.jpg
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Size:  86.1 KB Pin pushes in and turns freely but doesn't drop thru, pretty much the fit I wanted.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

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  22. #40
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    Re: Jib crane

    Name:  IMG_20211202_185849407.jpg
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Size:  111.4 KB not a whole lot done but none the less a few more pieces to the puzzle. Got the right hand threaded part done and the internal left hand thread done on the adjuster sleeve.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

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  24. #41
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    Re: Jib crane

    Not a whole lot done today. Had to deal with the first real snow of the year. Name:  IMG_20211205_191616971.jpg
Views: 269
Size:  143.8 KB Threaded the external left and right hand ends , installed the clevis and tensioned it up. Next up is the other portion of hinge which is some welding and drilling some 11/16" holes for 5/8" square bend U bolts.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

  25. #42
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    Re: Jib crane

    its amazing how just plugging away at a project a few hours here and there at the end of a period of time there was a lot that got done. Its looking good
    Do not argue with an idiot. He will drag you down to his level and beat you with experience.

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  27. #43
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    Re: Jib crane

    Quote Originally Posted by idacal View Post
    its amazing how just plugging away at a project a few hours here and there at the end of a period of time there was a lot that got done. Its looking good
    Ain't that the truth. All in all this is pretty simple, basically 3 major pieces, the beam with hinge, the column mount hinge and the trolley I'm building to obtain the maximum amount of headroom. Then of course paint and installation. Really wanting to finish this up as I've aquired materials for 2 more projects. Incedentlly the first project is in the form of some sheets of 16 gauge, which now is a lesser priority.

  28. #44
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    Re: Jib crane

    Name:  IMG_20211209_183106661.jpg
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Size:  70.6 KB Another piece to the puzzle. 1.25" holes in 3/4"x4" stationary hinge mounts. The 8" channel it's welded to is drilled to accept 5/8" square bend U bolts that will clamp this to the column. Nothing like Rust-Oleum red oxide primer and a cheap harbor freight chip brush to put on a cheap durable coating.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

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  30. #45
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    Re: Jib crane

    For years one of my "trademarks" on irrigation fit-ups was lots of red Rustoleum and lots of brush marks.

  31. #46
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    Re: Jib crane

    Quote Originally Posted by 12V71 View Post
    For years one of my "trademarks" on irrigation fit-ups was lots of red Rustoleum and lots of brush marks.
    No doubt. That's what you get with the throwaway brushes. I'll break out the good stuff when it's time to paint.

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  33. #47
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    Re: Jib crane

    I stocked up on throwaway brushes yesterday at the Dollar Store. I could buy packs of 5 with various sizes for $4 Cdn. so they come in very handy when you just want to get some paint/primer on something and run (no puns or runs intended...). For the money they aren't too horrible to work with ....
    The harder you fall, the higher you bounce...

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  34. #48
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    Re: Jib crane

    Quote Originally Posted by whtbaron View Post
    I stocked up on throwaway brushes yesterday at the Dollar Store. I could buy packs of 5 with various sizes for $4 Cdn. so they come in very handy when you just want to get some paint/primer on something and run (no puns or runs intended...). For the money they aren't too horrible to work with ....
    For sure. They work good on the drill press, mill, lathe or whatever for removing chips. Oh yeah and keep one handy when using a carbide Burr on a die grinder, you will thank me later.

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  36. #49
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    Re: Jib crane

    Quote Originally Posted by 12V71 View Post
    For years one of my "trademarks" on irrigation fit-ups was lots of red Rustoleum and lots of brush marks.
    Mystery solved. I have long ďadmiredĒ your work..
    :

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  38. #50
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    Re: Jib crane

    Quote Originally Posted by whtbaron View Post
    I stocked up on throwaway brushes yesterday at the Dollar Store. I could buy packs of 5 with various sizes for $4 Cdn. so they come in very handy when you just want to get some paint/primer on something and run (no puns or runs intended...). For the money they aren't too horrible to work with ....
    I bought a pack where the handles fell off when you looked at them.

    Iím so cheap I try to reuse them at least a few times now before discarding.


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    :

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