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Qualities of a good plumb bob

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  • #31

    Re: Qualities of a good plumb bob

    Re: Qualities of a good plumb bob

    Steve your plans reminds me of a plumb bob I used to own. About 35 years ago a friend was taking a machinist course and had to do a final project. I mentioned that I needed a 5 lb. plumb bob for forming elevator shafts. What he created was a thing of beauty based upon an old surveyor’s bob; polished brass, replaceable hardened steel point, knurled top, etc. The first time I used it my partner ever so carefully lowered it 10 stories down the shaft to me and I steadied it on our reference point while he tied the line off at the top. By the time I climbed back up those 10 floors the line was limp – someone had cut the line and absconded with my new plumb bob. After that we went back to our old stand-by, a large coffee can with a nail centered in the bottom and filled with concrete. While certainly a less elegant solution, it probably worked just as well.

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    • #32

      Re: Qualities of a good plumb bob

      Re: Qualities of a good plumb bob

      I am sure it will be very nice, is this for a Customer.

      Jacques



      Originally posted by schor_ View Post
      I was thinking of a stainless point threaded in with a few extra points as replacements.

      Still trying to dream up a nice shape to turn it to. As well as a means to attach the string line. I don't want this to be just a plain old ordinary plumb bob.

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      • #33

        Re: Qualities of a good plumb bob

        Re: Qualities of a good plumb bob

        It's for a friend. If it was a customer then I would have to charge too much.

        Originally posted by Jacques Leclerc View Post
        I am sure it will be very nice, is this for a Customer.

        Jacques
        Steve The Drill Sergeant
        Check out MyShopNotes on YouTube.

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        • #34

          Re: Qualities of a good plumb bob

          Re: Qualities of a good plumb bob

          Here is some photos of the ones I have with their attachment points
          DSCN1905.JPGDSCN1906.JPGDSCN1907.jpgDSCN1908.jpgDSCN1909.jpg
          sigpic
          Jerome
          Canada's South Coast
          Port Colborne On.
          Any society that would give up a little liberty to gain a little security will deserve neither and lose both.
          Benjamin Franklin

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          • #35

            Re: Qualities of a good plumb bob

            Re: Qualities of a good plumb bob

            I've got some materials together that I think would work well. I just hope my friend that wants a plumb bob is willing to take something that will be around 6" long or maybe longer. Bronze, brass, stainless and some Indian rosewood.

            IMG_00000324.jpgIMG_00000325.jpg

            Still dreaming up the shape it will end up being.
            Steve The Drill Sergeant
            Check out MyShopNotes on YouTube.

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            • #36

              Re: Qualities of a good plumb bob

              Re: Qualities of a good plumb bob

              Another data point for plumb bob usage: timber framers.

              I have not done any timber framing, but a Galoot acquaintance has (see http://forum.canadianwoodworking.com...82-Raising-Day). We asked Dan how he laid out the joinery on those big beams, and he said he used a framing square, chalk line and plumb bob. The plum bob was used to lay out the vertical cuts on the ends of the beams and the tenon shoulders. The chalk line was used to keep things lined up from one end to the other. So even if the beam was not as straight as one would like, the plumb bob kept all the joinery lined up, and the chalk line showed where excess material had to be cut away where a flat surface was required.

              Darrell
              who has a couple of plumb bobs, and has used one to site footings for a gazebo, but nothing as ambitious as a timber frame
              Wood Hoarder, Blade Sharpener, and Occasional Tool User

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              • #37

                Re: Qualities of a good plumb bob

                Re: Qualities of a good plumb bob

                Steve, using different metal will make this plum Bob very special.

                Jacques

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                • #38

                  Re: Qualities of a good plumb bob

                  Re: Qualities of a good plumb bob

                  Steve, are you planing to post the step by step the making of the plum bob.

                  Jacques



                  pl
                  Originally posted by schor View Post
                  I've got some materials together that I think would work well. I just hope my friend that wants a plumb bob is willing to take something that will be around 6" long or maybe longer. Bronze, brass, stainless and some Indian rosewood.

                  [ATTACH=CONFIG]69031[/ATTACH][ATTACH=CONFIG]69032[/ATTACH]

                  Still dreaming up the shape it will end up being.

                  Comment


                  • #39

                    Re: Qualities of a good plumb bob

                    Re: Qualities of a good plumb bob

                    I am taking some pics, not sure if I'll do a video. Videos of turning on the lathe can be boring.

                    Here's some of the parts to this multipart bob I am making. Indian rosewood on brass. This will be threaded onto the main bronze weight and have the steel point on it.

                    IMG_00000349.jpgIMG_00000348.jpg
                    Steve The Drill Sergeant
                    Check out MyShopNotes on YouTube.

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                    • #40

                      Re: Qualities of a good plumb bob

                      Re: Qualities of a good plumb bob

                      Maybe this gives you a better idea of the final point I'm going for with the bob. The rosewood is about 1.125 dia.

                      IMG_00000351.jpgIMG_00000350.jpg
                      Steve The Drill Sergeant
                      Check out MyShopNotes on YouTube.

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                      • #41

                        Re: Qualities of a good plumb bob

                        Re: Qualities of a good plumb bob

                        Looking good so far Steve. That is a particularly orange/yellow piece of Indian Rosewood; it goes well with the brass/bronze.

                        Ken

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                        • #42

                          Re: Qualities of a good plumb bob

                          Re: Qualities of a good plumb bob

                          Steve, just love the color of the rosewood metal. Great job.

                          Jacques

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                          • #43

                            Re: Qualities of a good plumb bob

                            Re: Qualities of a good plumb bob

                            I think I stole the idea of brass and rosewood from Jack.
                            Steve The Drill Sergeant
                            Check out MyShopNotes on YouTube.

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                            • #44

                              Re: Qualities of a good plumb bob

                              Re: Qualities of a good plumb bob

                              I've been thinking about the tip for the bob and am wondering if anyone knows of a threaded tip that can be bought anywhere/everywhere. That way The eventual owner of this bob can always source a new point.
                              Steve The Drill Sergeant
                              Check out MyShopNotes on YouTube.

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                              • #45

                                Re: Qualities of a good plumb bob

                                Re: Qualities of a good plumb bob

                                Originally posted by schor View Post
                                I've been thinking about the tip for the bob and am wondering if anyone knows of a threaded tip that can be bought anywhere/everywhere. That way The eventual owner of this bob can always source a new point.
                                Empire lists a PN for a replacement tip, #90832, but finding one might be real hard. http://www.empirelevel.com/string-to...bobs/index.php

                                What about just machining a couple? Or buying a cheap plumb bob to steal the point off?
                                Last edited by scooby074; 12-10-2013, 12:23 AM.

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