Announcement

Collapse
No announcement yet.

Shop Crane Modification

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

  • Shop Crane Modification

    I would like to modify my 2 ton shop crane to add an electric driven hydraulic pump to raise and lower the hydraulic ram. I could attach it to the back of the crane. Raising the ram by hand takes a bit of time. I'm not looking to use a winch of any type. Any ideas on what I might use or how to do it? Thank you.

  • #2
    https://www.ebay.com/itm/13-Quart-Do...0AAOSwlj9d6hVd

    https://www.ebay.com/itm/10-Quart-Si....c101195.m1851

    https://www.ebay.com/itm/8-Quart-Sin....c101196.m2219
    Check the pump rate vs whatever cylinder you have. If the pump flows too much you don't want it as you can't have an excessive ram speed.
    Note that these are 12v DC which might be a pain to deal with.



    Or go air powered.
    https://www.ebay.com/itm/TEMCo-Air-H...MAAOSw61dbs52-
    Last edited by I make chips; 01-10-2021, 12:15 PM.

    Comment


    • #3
      As long as the pump produces adequate pressure (8,000-10,000psi) there's no reason you can't. Do you specifically want electric, or would air over hydraulic work?

      https://www.harborfreight.com/8-ton-...ack-56215.html
      I just need one more tool,just one!

      Comment


      • #4
        I make chips, wierdscience...Thank you both for the response. The shop crane is from Harbor Freight and has an 8 ton long ram. I specifically wanted electric as it's a little easier for me in my garage.

        Comment


        • #5
          If you need to lift somewhere near the capacity of the hoist, then this might be your best bet-

          https://www.ebay.com/itm/Electric-Hy...75.c100623.m-1
          I just need one more tool,just one!

          Comment


          • #6
            wierdscience...You beat me to it. I was wondering what I might use if I were to lift something near the capacity of the crane. It's 2 ton. I may never lift anything that heavy but none-the-less, I would have it if I needed it.

            Comment


            • #7
              Originally posted by lovemesomemachines View Post
              wierdscience...You beat me to it. I was wondering what I might use if I were to lift something near the capacity of the crane. It's 2 ton. I may never lift anything that heavy but none-the-less, I would have it if I needed it.
              It's 2 ton of lift but the cylinder is pushing up with quite a bit more. I'd have to measure my own hoist but I'm pretty sure the pivot to 2 ton lift position is pretty easily 4 times the distance from pivot to cylinder attachment. So you'd need an 8 ton cylinder to lift two tons.

              Mind you.... in reality I'm not sure I want to see an actual 2 tons being lifted by these things. At least not if we expect to wheel it around anywhere. Even a little under 1000lbs and they seem pretty rickety. So perhaps something a touch less lift ability than 8 tons for the cylinder would be a nice safety feature. Or perhaps an 8 ton cylinder with a pressure limit on the hydraulic delivery. And then be mindful of that limit.

              Chilliwack BC, Canada

              Comment


              • #8
                BCRider...Yes, mine has an 8 ton ram/cylinder. At least that's what it says on the label. I don't expect that I will need to lift anything to the limit of the crane, however, never say never.

                Comment


                • #9
                  I'm not sure I want to see an actual 2 tons being lifted by these things
                  I've had trouble lifting half that with mine. Back raises up rather than the load. Yes, I set it to the specified arm length, or better.
                  "A machinist's (WHAP!) best friend (WHAP! WHAP!) is his hammer. (WHAP!)" - Fred Tanner, foreman, Lunenburg Foundry and Engineering machine shop, circa 1979

                  Comment


                  • #10
                    Many industries are moving away from hydraulic/pneumatic linear motion entirely, no oil leaks, precise position control, lower noise and longer maintenance intervals.
                    Look into electric cylinders which are simply lead screw driven replacements for hydraulic cylinders.
                    https://www.nookindustries.com/produ...tric-cylinder/

                    Comment


                    • #11
                      Bented...Thank you for the post. Great idea. If they have one that is the same physical footprint of the hydraulic ram that's on my crane, I would buy it.

                      Comment


                      • #12
                        If you go with an air over hydro unit be aware that the motion is extremely jerky, not at all smooth. It is simply a one-stroke pump that cycles very fast. Most are annoyingly noisy too, not to mention slow.
                        Southwest Utah

                        Comment


                        • #13
                          Originally posted by chipmaker4130 View Post
                          If you go with an air over hydro unit be aware that the motion is extremely jerky, not at all smooth. It is simply a one-stroke pump that cycles very fast. Most are annoyingly noisy too, not to mention slow.
                          BOTH jerky AND slow?

                          I can easily see jerky, although a restrictor orifice in the hydraulic line would fix that, as well as making it slow. Jerky seems to imply fast, or faster than wanted.
                          2801 3147 6749 8779 4900 4900 4900

                          Keep eye on ball.
                          Hashim Khan


                          It's just a box of rain, I don't know who put it there.

                          Comment


                          • #14
                            Nope, they're both. The output piston is tiny to get the pressure increase, hence the 'slow'. The piston stroke is very sudden, hence the 'jerky'. The noise? Well, just like a mini version of a jackhammer on the end of a trackhoe. (OK, not that noisy but it'll wake the household if indoors.)
                            Southwest Utah

                            Comment


                            • #15
                              Love me some pictures, or it didn't happen.

                              -Doozer
                              DZER

                              Comment

                              Working...
                              X