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  • collars for dumbell

    Hi, I wonder how they made the collars for this load able dumbell Handel.
    Attached Files

  • #2
    collars for dumbell

    I made one before with 50mm/2 inch washers but they were a bit thin

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    • #3
      collars for dumbell

      The bar and Handel is 2iinch/50mm

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      • #4
        There is too much paint on it to tell. Could be a casting, a forging, a welded assembly or machined from a large enough bar.--Meltedmetal

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        • #5
          Could be lathed. the ones with thread on the ends are.

          Ji
          Grip it and Rip it

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          • #6
            Here's better pics
            Attached Files

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            • #7
              Wow...

              Never have I seen something so simple be treated like it needs to be sent to NASA for analysis...!
              It is punched out of flat stock...like plate or bar.
              You can see the die marks on the edge...or punch marks, however you decide which one leaves them.
              MillerMatic 211 Auto-set w/MVP
              Just For Home Projects.

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              • #8
                collars for dumbell

                They cut from plate not punch if they are old it was oxyfuel. Newer ones are made using plasma or laser.

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                • #9
                  The discs are burned from plate. Either oxy/acet or plasma. My guess the ones in the pic are oxy/acet. With a burning machine doing a large qty. the cost would be cheap. To make just a few it wouldn't be profitable for resale.

                  Today plasma would most likely be used.
                  MM250
                  Trailblazer 250g
                  22a feeder
                  Lincoln ac/dc 225
                  Victor O/A
                  MM200 black face
                  Whitney 30 ton hydraulic punch
                  Lown 1/8x 36" power roller
                  Arco roto-phase model M
                  Vectrax 7x12 band saw
                  Miller spectrum 875
                  30a spoolgun w/wc-24
                  Syncrowave 250
                  RCCS-14

                  Comment


                  • #10
                    collars for dumbell

                    So they just plasma cut the holes out of a 1/2 inch 25mm plate?

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                    • #11
                      Originally posted by Bossman2000 View Post
                      So they just plasma cut the holes out of a 1/2 inch 25mm plate?
                      Yes.
                      MM250
                      Trailblazer 250g
                      22a feeder
                      Lincoln ac/dc 225
                      Victor O/A
                      MM200 black face
                      Whitney 30 ton hydraulic punch
                      Lown 1/8x 36" power roller
                      Arco roto-phase model M
                      Vectrax 7x12 band saw
                      Miller spectrum 875
                      30a spoolgun w/wc-24
                      Syncrowave 250
                      RCCS-14

                      Comment


                      • #12
                        collars for dumbell

                        Sound!

                        Comment


                        • #13
                          I would also say flame or plasma cut. Your later pictures show more detail. I sometimes lay a tape measure extended beside the part I am photographing to give a size reference in the photo. I find it helps when I refer to it later. I'm guessing you want to make some of these? Depending on how you are equipped and how many you want to make you could also machine them from solid bar or cut them from heavy walled tubing if you can find it in the right dimensions at a reasonable price. Plasma does do an acceptable job though.---Meltedmetal

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                          • #14
                            Not that I can prove it but...

                            ...I stick by my answer of "these are punched."
                            There is no way they would be cost effective "torched" out...for something so simple.
                            MillerMatic 211 Auto-set w/MVP
                            Just For Home Projects.

                            Comment


                            • #15
                              Cost effectiveness would depend on the equipment available and the number required. If I understand the Bossman, the center hole is 2 inches. They appear to be taller than they are thick and he says they are 1/2 thick so that would make the OD somewhere over 3 inches.
                              Meltedmetal

                              And my eyesight isn't what it used to be but I see torch marks. Haha. Mm

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