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  • Commercial Tree Stand Repair

    I didn't realize that a commercial Christmas tree stand could cost $472. Figure 1 below shows a typical one.

    1. Commercial Tree Stand
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    One of the engineers that I work with dropped off an heavy duty Christmas tree stand to be repaired. Originally it had 4x 1/2"-13 UNC PEM type nuts pressed into tabs that held screws that contacted the tree as shown below. Two of the four PEM nuts had pulled out.

    2. Broken Tree Stand
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    3. PEM Threaded insert
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    My friend had replaced the missing PEM nut with two nuts as shown below.

    4. Nut to replace missing insert
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    The tab that supported the PEM nut was kind of wimpy as shown below.

    5. Not much metal on tab
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    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Lincoln LE 31 MP
    Lincoln 210 MP
    Clausing/Colchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

  • #2
    Some of the tabs were bent right at the hole instead of the base of the tab.

    6. Bent tab
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    The other problem was that the base of spike that supported the tree was cracked where it was attached to the water pan.

    7. Crack at base of spike
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    After I removed the spike from the pan, I found that there was a cold lap joint on the weld that attached the spike to the pan. The rusty metal in the next two pictures show that there was large areas of the weld with no penetration.

    8. Cold lap on weld-1
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    9. Cold lap on Weld-2
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    This defective weld also minimized the foot print supporting the spike, The minimum foot print in conjunction with the damaged PEM nuts caused a moment on the base of the spike that cracked the bottom of the pan as shown below. This is a problem because it would cause the tree water to leak out of the pan.

    10. Bottom of stand
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    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Lincoln LE 31 MP
    Lincoln 210 MP
    Clausing/Colchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

    Comment


    • #3
      11. Crack on bottom near spike
      Click image for larger version  Name:	11. Crack on bottom near spike.jpg Views:	59 Size:	62.7 KB ID:	608653

      I cut out a disk to beef up the area where the spike attaches to the pan.

      12. Cutting disk
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      13. Disk cut
      Click image for larger version  Name:	13. Disk cut.jpg Views:	54 Size:	142.8 KB ID:	608655

      I TIG plug welded the spike to the disk as shown below and then fillet welded the top of the spike to the disk on the other side (not shown in this picture)

      14. Spike plug welded
      Click image for larger version  Name:	14. Spike plug welded.jpg Views:	54 Size:	121.7 KB ID:	608656

      Next I MIG welded the spike/disk assembly to the bottom of the pan as shown below.

      15. Spike replaced-1
      Click image for larger version  Name:	15. Spike replaced-1.jpg Views:	55 Size:	59.5 KB ID:	608657
      Last edited by Don52; 05-30-2020, 11:26 AM.
      Miller Thunderbolt
      Smith Oxyacetylene Torch
      Miller Dynasty 200DX
      Lincoln SP-250 MIG Welder
      Lincoln LE 31 MP
      Lincoln 210 MP
      Clausing/Colchester 15" Lathe
      16" DuAll Saw
      15" Drill Press
      7" x 9" Swivel Head Horizontal Band Saw
      20 Ton Arbor Press
      Bridgeport

      Comment


      • #4
        Nice, Gotta love Jacobs Rubber flex collets...Bob
        Bob Wright

        Comment


        • #5
          16. Spike replaced-2
          Click image for larger version  Name:	16. Spike replaced-2.jpg Views:	56 Size:	69.9 KB ID:	608660

          I also TIG welded the spike to the bottom of the original pan.

          17. Spike welded to top-1
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          18. Spike welded to top-2
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          I decided to remove the wimpy tabs and replace them with thicker wider tabs. Notice the fill-in weld shown in the upper left hand view. (You have to work with the geometry that you are dealt.)

          19. SolidWorks drawing of new tab
          Click image for larger version  Name:	19. SolidWorks drawing of new tab.jpg Views:	53 Size:	66.7 KB ID:	608663

          I tap drilled the tabs for 1/2"-13 UNC threads. I wanted to orient the flats of the nut parallel to the chamfer so I made a threaded arbor to align the tap drilled hole in the tab with the threaded hole in the nut.

          20. Nut alignment arbor
          Click image for larger version  Name:	20. Nut alignment arbor.jpg Views:	53 Size:	187.8 KB ID:	608664
          Last edited by Don52; 05-30-2020, 11:27 AM.
          Miller Thunderbolt
          Smith Oxyacetylene Torch
          Miller Dynasty 200DX
          Lincoln SP-250 MIG Welder
          Lincoln LE 31 MP
          Lincoln 210 MP
          Clausing/Colchester 15" Lathe
          16" DuAll Saw
          15" Drill Press
          7" x 9" Swivel Head Horizontal Band Saw
          20 Ton Arbor Press
          Bridgeport

          Comment


          • #6

            Next I TIG welded the nut to the tab.

            21. Nut in place for welding
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            22. Nut TIG welded
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            Then I ran a 1/2"-13 UNC tap thru the nut and tapped the tab as shown below.

            23. Tab tapped
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            24. Tab - nut asm done
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            Next I cut off the four tabs.

            25. Old tab cut off
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            Miller Thunderbolt
            Smith Oxyacetylene Torch
            Miller Dynasty 200DX
            Lincoln SP-250 MIG Welder
            Lincoln LE 31 MP
            Lincoln 210 MP
            Clausing/Colchester 15" Lathe
            16" DuAll Saw
            15" Drill Press
            7" x 9" Swivel Head Horizontal Band Saw
            20 Ton Arbor Press
            Bridgeport

            Comment


            • #7
              Then I clamped the new tab/nut assembly in place.

              26. New tab clamped in place
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              Finally I TIG welded the tabs to the base.

              27. Weld on bottom of brace
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              28. Top weld on tab
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              29. Bottom Weld on tab
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              And here it is all done except for painting.

              30. Tabs all welded
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              Miller Thunderbolt
              Smith Oxyacetylene Torch
              Miller Dynasty 200DX
              Lincoln SP-250 MIG Welder
              Lincoln LE 31 MP
              Lincoln 210 MP
              Clausing/Colchester 15" Lathe
              16" DuAll Saw
              15" Drill Press
              7" x 9" Swivel Head Horizontal Band Saw
              20 Ton Arbor Press
              Bridgeport

              Comment


              • #8

                Last but not least I painted it.

                31.Bottom Painted
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                32. Top Painted
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                33. All Done
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                -Don
                Miller Thunderbolt
                Smith Oxyacetylene Torch
                Miller Dynasty 200DX
                Lincoln SP-250 MIG Welder
                Lincoln LE 31 MP
                Lincoln 210 MP
                Clausing/Colchester 15" Lathe
                16" DuAll Saw
                15" Drill Press
                7" x 9" Swivel Head Horizontal Band Saw
                20 Ton Arbor Press
                Bridgeport

                Comment


                • #9
                  Now it’s a $1000 tree stand. Good work, Don.

                  Comment


                  • #10
                    Don, I bet they could use that for the tree at Rockefeller center. Another job well done.

                    Comment


                    • #11
                      Originally posted by aametalmaster View Post
                      Nice, Gotta love Jacobs Rubber flex collets...Bob
                      Yes, I like the Jacobs Rubber flex collets. They make my 15” lathe behave like a small lathe.

                      -Don
                      Miller Thunderbolt
                      Smith Oxyacetylene Torch
                      Miller Dynasty 200DX
                      Lincoln SP-250 MIG Welder
                      Lincoln LE 31 MP
                      Lincoln 210 MP
                      Clausing/Colchester 15" Lathe
                      16" DuAll Saw
                      15" Drill Press
                      7" x 9" Swivel Head Horizontal Band Saw
                      20 Ton Arbor Press
                      Bridgeport

                      Comment


                      • #12
                        Nice! I always love the final stages of repainting a project and making it look new again. Great job
                        Millermatic 252, Hypertherm Powermax30 XP, Hypertherm Powermax45 XP, LOTOS LTP5000D https://fabricationguy.com/

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