Announcement

Collapse
No announcement yet.

Home made jib crane with photos

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Home made jib crane with photos

    Hi,
    I have been having a hard time lifting things on and off the mill and the lathe for some time and usually had to get a hand off someone (usually my son) to give me a lift. The problem is not age but a broken disc in my neck and after a MI scan and surgery (the operation was unsuccessful) the doctors told me I had an 80 year old spine at the ripe old age of 38 that was 4 years ago. About 12 months ago I had the son in-law help lift the 250mm (10”) rotary and he nearly dropped it, so I decided to build a crane to do the lifting as I still wanted to lift things on my own but safely.

    After some research on the internet (not much out there) I built this jib crane last year but only put it up at Christmas. It was made of scrap that I picked up in a dumpster and the main post a mate gave to me.
    The beam is 150mm x 75 (6"x3") and is 2.3 mtrs (7.5ft) long made up of 2 pieces welded together. The vertical leg is 1mtr (3.2ft) long.

    The bearings retainers are from the rear diff of a Nissan 720 4x4 pickup with a standard 30mm inner bearing in the top retainer and the bottom one with the original taper bearing from the axle. There is a 40mm (13/4”) square trailer axle machined at both ends to suit the bearings welded to the back of the crane. I made plates up to go around them and welded them to the crane as extra insurance.

    I made the brackets up to hold the bearing retainers out of 10mm (3/8") plate and they bolt onto the 100x100mm (4"x4") thick wall post. They bolt on to the post with 4 x 20mm (3/4) HT bolts top and bottom. I welded the nuts to a 300mm x 90 x 6mm ((1’x 3 1/2”x1/4”) plates top and bottom and then slid the plates inside the post while it was laying on the ground. A couple of small countersunk bolts hold them in place until the post goes up and the bolts go in. The top plates are 150 x 150x 10mm (6”x6”x3/ with the same 20mm bolts and the bottom plate is 300x175x20mm (1’x7”x3/4) with 5x 16mm (5/ pins into the concrete. I made the dummy bolts at the bottom because it has to be removed to another location latter. They have a hex head but no thread and are hammered 75mm (3”)into the tight fitting hole in the concrete.

    You will see in the photo that I made up some temporary angle brackets with thread bar to do the final adjustments to the post when the crane was up, before welding the bottom. I was lucky I did that as when I first put it up it needed to go higher than I thought. So I lifted it 150mm higher and had to redrill more holes and plug up the old ones.
    The beam trolley is made up to suit the electric winch my wife bought me for a Christmas present. I had an old beam trolley that I got the wheels off.

    Just after getting it up I decided I needed a cable festoon for the electric wires so I found a deal on eBay plastic wheels and made some trolleys up out of 3mm (1/8”) plate.
    I made it so the controller is separate from the winch and left provision for the power controls that I will be fitting latter to move it in and out and side to side.

    I haven’t used it much as I am doing renovations on the house but it will be a big help in the future.
    All up it only cost me $25Aus dollars and that was for the stickers and the festoon wheels.

    This is the first time I have put together a post so I hope I haven’t left anything out and I hope it’s understandable.

    Davo








    Edit,
    I just looked up this thread for another member and found Glacern must have canceled there photo hosting so the pictures where all gone.
    Last edited by Davo J; 02-24-2013, 03:43 AM. Reason: Glacern don't support picture storage any more?

  • #2
    Wow! Think you could stop by Garner, NC, USA and do the same for me? On second thought, the drive from Australia may get a bit damp.

    That's exactly what my shop needs. I have the hoist already but haven't been able to find the steel for the crane. I've been looking off and on for a year but nobody seems to want to scrap I beam that I can find.

    A few points, I think the picture links are broken, unless the few I clicked on are the only ones broken.

    Second, how did you mount this to the floor (maybe shown in a picture I can't see) Did you have to reinforce the concrete somehow? Did you flair the base so it has a wider footprint or simply use a plate?

    How did you determine the 500 kilo weight rating? The failure point of the main beam?
    Dan from Raleigh, NC

    If it's stupid but it works, it's not stupid.
    _____________________
    "What is your host's purpose for the party? Surely not for you to enjoy yourself; if that were their sole purpose, they'd have sent champagne and women over to your place by taxi." P.J. O'Rourke

    Comment


    • #3
      Hi
      The measurements of the base are in the post above. I'm no engineer, I looked on different websites in the US and they are using this size beam for their 1000lb crane so that translates to around 500kg. There are shear calculators online if you look around. The main thing is the post, this crane has around 1.2 ton push/pull thrust when fully loaded at the end with 500kg.


      Comment


      • #4
        Deleted post
        Last edited by Davo J; 02-23-2010, 08:35 AM.

        Comment


        • #5
          Incorrect links

          Davo.

          This is the message I get from your links:

          The page you tried to access does not exist on this server. This page may not exist due to the following reasons:

          You are the owner of this web site and you have not uploaded (or incorrectly uploaded) your web site. For information on uploading your web site using FTP client software or web design software, click here for FTP Upload Information.

          The URL that you have entered in your browser is incorrect. Please re-enter the URL and try again.

          The Link that you clicked on incorrectly points to this page. Please contact the owner of this web site to inform them of this situation.
          These two pics came up fine here:





          As soon as I saw the "Davo" I guessed that you are in OZ - and as soon as I saw the Hafco mill, I was sure of it.

          Comment


          • #6
            Some more







            Last edited by Davo J; 02-24-2013, 03:45 AM. Reason: Same Glacern problem as above

            Comment


            • #7
              Some more







              Last edited by Davo J; 02-24-2013, 03:46 AM. Reason: Same Glacern problem as above

              Comment


              • #8
                And last







                Last edited by Davo J; 02-24-2013, 03:47 AM.

                Comment


                • #9
                  All fixed now Oldtiffie.
                  Davo

                  Comment


                  • #10
                    wow, very pro looking. I'm tired just looking at how much work that was
                    .

                    Comment


                    • #11
                      Very impressed.

                      Thanks Davo.

                      I am very impressed!!

                      How have you countered the lateral thrust from the column to the roof structure? I can see some lateral horizontal tubing at the truss bottom chord level - wind brace?

                      Comment


                      • #12
                        Yeh, it took me about 2 weeks to clean out the shed to get it in there and another week to clean up and organise everything on top of the job. The new shed is getting an overhead crane not realy looking forward to building that one.
                        Davo

                        Comment


                        • #13
                          Thanks Oldtiffie,
                          My shed was desighed by my father in-law who has passed now. He was a chief drartsman in the mines each truss will is capable of lifting 3 ton. Where you see that heavy wall pipe over head going to the truss there is a 2"x2"x1/4"criss cross brace that starts on the other side of that post which it's tied into. There is also one on the wall behind the crane on the next section down. I have had no movment on it with 150kg at full reach.
                          Davo

                          Comment


                          • #14
                            Great work! I've got at last count, four bad disks in my neck, one in the middle and one at the bottom. I hope yours hold up better since you caught it sooner. I was a basket case by the time I had significant symptoms. Now I have Evil Kanevil's 80 YO spine.

                            I have a similar power hoist. So far just been hanging it off the rafters to lift lighter weights. I fir use it to lift itself LOL Also handy to get stuff up in the attic of the house.

                            Comment


                            • #15
                              By George you Aussies don't mess around--that is a nice piece of work!

                              Eventually I'll get tired of loading thing on and off my mill. Recent use of 2 tandem 6" Kurt vises is getting close. Meanwhile, I rely on one of those scissor tables to at least keep the travel short.

                              But a jib crane, that would be sweet.

                              Cheers,

                              BW
                              ---------------------------------------------------

                              http://www.cnccookbook.com/index.htm
                              Try G-Wizard Machinist's Calculator for free:
                              http://www.cnccookbook.com/CCGWizard.html

                              Comment

                              Working...
                              X