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Repair of 12.5 Ton Log Splitter

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  • Repair of 12.5 Ton Log Splitter

    The slider bracket that attaches to the ram on my friend’s 12.5 ton log splitter failed.
    -Picture 1 & 2 show log splitter with the bent slider bracket with cracked welds.
    -Picture 3 show the initial weld crack which is rusty as well as the final weld crack which is clean.
    -Picture 4 shows a crack in the bend which initiated at the notch from the clamp on the brake used to bend the plate. The direction of the crack made it difficult to grind out the crack so I cut the entire corner off of the bracket and re-welded it.
    -Picture 5 shows the bracket prepared and ready for tack welding. I added a rib extension because I felt that the original rib was too short. This and the poor penetration of the welds are the root cause of the problem.
    -Picture 6 & 7 show a close ups of the welds.
    -Picture 8 shows the penetration on the back side of the outside corner weld.
    -Picture 9 shows the bracket all done.
    It will be painted and re-installed tomorrow.
    Attached Files
    Last edited by Don52; 08-08-2010, 09:23 AM.
    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Miller Spectrum 375 Plasma Torch

  • #2
    Repair of 12.5 Ton Log Splitter

    Here are the rest of the pictures:
    Attached Files
    Last edited by Don52; 08-08-2010, 06:27 AM. Reason: Get Pictures in correct order
    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport
    Miller Spectrum 375 Plasma Torch

    Comment


    • #3
      Repair of 12.5 Ton Log Splitter

      In my opinion a log splitter should be designed to stall the hydraulic ram before it bends the slider bracket, even if the log is not cut square and makes contact with the bottom of the slider bracket. The 100% penetration groove weld with the fillet weld on top and the extended rib that I added will improve the strength of the rib connection to the base plate. If you look at attached pictures 10 and 11 you can see the various plates of the slider bracket are all bent. My friend wanted to know what could be done to beef up the bracket so it wouldn’t bend any more. It seems like it might be easier to re-make the entire thing out of thicker metal. What do you think?
      Attached Files
      Miller Thunderbolt
      Smith Oxyacetylene Torch
      Miller Dynasty 200DX
      Lincoln SP-250 MIG Welder
      Clausing/Coldchester 15" Lathe
      16" DuAll Saw
      15" Drill Press
      7" x 9" Swivel Head Horizontal Band Saw
      20 Ton Arbor Press
      Bridgeport
      Miller Spectrum 375 Plasma Torch

      Comment


      • #4
        Originally posted by Don52 View Post
        In my opinion a log splitter should be designed to stall the hydraulic ram before it bends the slider bracket, even if the log is not cut square and makes contact with the bottom of the slider bracket. The 100% penetration groove weld with the fillet weld on top and the extended rib that I added will improve the strength of the rib connection to the base plate. If you look at attached pictures 10 and 11 you can see the various plates of the slider bracket are all bent. My friend wanted to know what could be done to beef up the bracket so it wouldn’t bend any more. It seems like it might be easier to re-make the entire thing out of thicker metal. What do you think?
        I agree the base plate needs to be thicker..Pull the cover on the control valve to adjust the dump valve if you want it to stall sooner..
        Steve

        Bobcat 250EFI

        Syncrowave 250

        Millermatic 350P

        Hypertherm 1250

        A Bunch of tools

        And a forklift to move the heavy stuff with..

        Torchmate 2x2 CNC Plasma

        It's Miller Time - Get Back To Work!

        Comment


        • #5
          Thanks for the comments.

          The truth is that the splitter will most likely keep working with bent base and top plates, so we may never have to rebuild the bracket. The show stopper was when the welds on the ribs failed and the bracket bent over. If the bracket ever fails again I would be inclined to redesign and re-make it with properly sized plates, as you suggested.

          One observation that someone else made was that the right side of both of the rib welds were cold lap. Do you agree?
          Attached Files
          Miller Thunderbolt
          Smith Oxyacetylene Torch
          Miller Dynasty 200DX
          Lincoln SP-250 MIG Welder
          Clausing/Coldchester 15" Lathe
          16" DuAll Saw
          15" Drill Press
          7" x 9" Swivel Head Horizontal Band Saw
          20 Ton Arbor Press
          Bridgeport
          Miller Spectrum 375 Plasma Torch

          Comment


          • #6
            Originally posted by Don52 View Post

            One observation that someone else made was that the right side of both of the rib welds were cold lap. Do you agree?
            Lots of bad welds come out of factories where 7 dollar an hour welders are the norm or they are machine welded and no one ever looks at the parts. I just had a Genuine HD trans part come in my shop to be bored out and it had the ugliest machine weld on it i have seen in a while. The bead even skipped a few spots and didn't burn in to what they were welding...Bob
            Bob Wright

            Spool Gun conversion. How To Do It. Below.
            http://www.millerwelds.com/resources...php?albumid=48

            Comment


            • #7
              For your splitter I'd make a new slider / traveller and have it on-hand n case the repairs cannot overcome the too light materials used.

              I made this splitter and it's a beast. The 3/4" slider plate has bowed slightly after about 6 or 7 cords of Birch, Pine, and other. It travels fine, no problem. At the max 28gpm it has a 4-second cycle but I run the 20hp Honda at just above idle for an output of 11gpm and it's plenty fast for one guy.

              Last edited by Johnny; 08-13-2010, 07:09 AM.
              MillerMatic 140 Auto-Set

              Comment


              • #8
                Originally posted by Johnny View Post
                For your splitter I'd make a new slider / traveller and have it on-hand n case the repairs cannot overcome the too light materials used.
                Good idea.
                I made this splitter and it's a beast. The 3/4" slider plate has bowed slightly after about 6 or 7 cords of Birch, Pine, and other. It travels fine, no problem. At the max 28gpm it has a 4-second cycle but I run the 20hp Honda at just above idle for an output of 11gpm and it's plenty fast for one guy.
                You made a nice looking log splitter.
                Miller Thunderbolt
                Smith Oxyacetylene Torch
                Miller Dynasty 200DX
                Lincoln SP-250 MIG Welder
                Clausing/Coldchester 15" Lathe
                16" DuAll Saw
                15" Drill Press
                7" x 9" Swivel Head Horizontal Band Saw
                20 Ton Arbor Press
                Bridgeport
                Miller Spectrum 375 Plasma Torch

                Comment


                • #9
                  Thank You.

                  I haven't been here since the post- vacationing in Crater Lake.
                  MillerMatic 140 Auto-Set

                  Comment


                  • #10
                    Originally posted by Don52 View Post
                    One observation that someone else made was that the right side of both of the rib welds were cold lap. Do you agree?
                    Perhaps some fault can be attached to weld quality, but even a sound weld can be expected to fail in a flawed design.

                    Comment

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