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Spinning metal? form question

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  • Spinning metal? form question

    I just glued up a form for a specialty headlight. I was told by my buddy the carpenter to use elmers glue, as good as anything. I laminated exterior 3/4" plywood.

    NOW for forming tools? Is a hardwood stick enough or do I need to build a fancy roller stick? I have 22ga mirror polished stainless to stretch over the form.

    Release agent? wax on form? Oil on stick? vegetable oil?

    David

  • #2
    David, attempted to spin once , need to invest some time to make proper tools. I bought a Lindsay book on spinning , was well worth the 4.00 . I do belive you will need a polished and hardened spoon to form the stainless along with some good cutting oil. also you may have to have the parts annealed several times to get the desired shape/depth. Stainless work hardens something fierce,when forming. We had some Aircraft header collectors made at a shop I worked at out of spun stainless, 7 annealing cycles to get the parts to final shape ,without cracks.Very expensive. Good luck, Maybe try aluminum first? Shawn

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    • #3
      Dave...

      Last time I saw anyone spinning metal was at a professional metal spinners.

      IIRC...they used a long metal bar with a ball race mounted on the end of it to form the metal,ordinary household bar soap as a lubricant.The end of the forming bar was tucked under the operators armpit for leverage.

      The work was held in place with a wooden disc against a running centre,tightened against the metal when it was running true.

      I seem to remember they made the actual former out of steel.

      Allan



      [This message has been edited by Allan Waterfall (edited 02-01-2005).]

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      • #4
        Maybe this will have some information that will help.

        Download this pdf file:

        http://prl.stanford.edu/documents/pdf/spinning.pdf

        ______________________________________

        [This message has been edited by Mike Burdick (edited 02-01-2005).]

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        • #5
          Hey David, good information on the above link. The book from Lindsay's goes into much greater detail, and at less than a six pack, is a pretty good bargain. Check'em out www.lindsaybks.com Good people to do business with, and more books on technical stuff than you can shake a stick at.
          Smitty.... Ride Hard, Die Fast

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          • #6
            I think what worries me.. is the thought of turning on that 24" cinncinatti lathe, hitting the metal with the tool the part comin spinning out like a hubcap off'n a tire smokin streetrod?

            Ever saw one? they will stick into a telephone pole. (We used to street race) Bad on the flagman.

            I'll have someone around the first time. The form is glued up, not turned to shape yet but glued. I may bolt it to a backing plate and spindle extension.

            David

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            • #7
              The Home Shop Machinist had a series on metal spinning a year or two back. Maybe the back issues are still available?

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              • #8
                <font face="Verdana, Arial" size="2">Originally posted by ibewgypsie:
                Release agent? wax on form? Oil on stick? vegetable oil?
                </font>
                Chill out, you're gettin' me excited. The wife has locked herself in the bathroom and the dog is hiding behind the sofa.

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                • #9
                  Stainless, huh?

                  Not the stuff most people would want to learn spinning on. It's extremely nasty to spin, to say the least. It'll be a challenge, but from your previous posts it's apparent you like challenges, so go for it.

                  A roller tool might be best.

                  Release agent...doubtful you'll get the material to lay over the form tightly, so I wouldn't worry about a release agent.

                  A word of caution.....be very careful working with stainless. It's dangerous material to spin.

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                  • #10
                    I saw a metal spinning DVD for sale on ebay.
                    I checked out the website it is a two dvd disc set, explains everything from making your own spinning tools to spinning all kinds of shapes. It might still be on ebay.

                    the website is

                    www.metalspinningworkshop.com

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                    • #11
                      A friend of mine is a hobby metal spinner. He gives this rule of thumb: When spinning soft metals (brass, aluminum, copper, etc.) use a hard tool (polished steel); and, when spinning hard materials use a soft tool (brass).

                      A professional metal spinner by the name of Paul Wiley wrote a book on the subject. Go to his Web site...

                      http://www.paulwileyspinning.com/

                      ...and click on "The Art of Metal Spinning"

                      Paul doesn't recommend spinning stainless steel, even if you are a professional. I've seen it done, but I also have sense enough to listen to someone with 40 years of professional experience.

                      Paul also has a Yahoo group, The Art of Metal Spinning.

                      Get a book and listen to a pro.

                      You can see some pictures of metal spinning at:

                      http://users.moscow.com/oiseming/lc_ant_p/pic_Spin.htm

                      It shows the size of the tool and the technique of holding the handle between the upper arm and body.

                      BTW, glycerin soap works well as a lubricant between the tool and the part being spun.

                      Regards,

                      Orrin
                      So many projects. So little time.

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                      • #12
                        well since it's a headlight, it would have a hole in the back, right?

                        if so you can run a bolt or all-thread trough it and into the die as a drawbar rather than just relying on tailstock pressure. then it's captive and cant come out and slice you up.

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