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tabman Inner circle USA 5946 Posts |
Any word on when the article is coming out, Bill??
-=tabman
...Your professional woodworking and "tender" loving care in the products you make, make the wait worthwhile. Thanks for all you do...
http://Sefalaljia.com |
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Bill Palmer Eternal Order Only Jonathan Townsend has more than 24314 Posts |
I haven't heard anything yet.
"The Swatter"
Founder of CODBAMMC My Chickasaw name is "Throws Money at Cups." www.cupsandballsmuseum.com |
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malaki Elite user 490 Posts |
Yes, this is an old thread, but some (like me) may still have an interest.
Metal spinning can be done on a wood lathe, but you must first buy or create a tool rest for the process. This consists of a post that fits into the banjo, topped with a flat bar of metal that has been welded to the post. The bar requires several holes be drilled down the length. These holes are for the leverage posts. These posts easily fit into the holes in the tool rest's bar holes and are easily moved from one hole to the next to allow you to move the tool further toward the tail stock so that the tool can be levered against the movable post, applying the leverage to the spinning metal. Metal becomes very fluid when spun, requiring you move the tool first one way, then back the other. As the tool is moved, you can see the ridge of metal move from the middle of the disc toward the edge and back again. If you spin in only one direction, the metal will become very thin. As the metal is spun, it is pressed against the wooden form, adopting it's shape. The tools for spinning metal can be purchased from Woodcraft, but only through their catalog. Lubrication is required to allow the tool to move easily across the metal disc, and eliminate much of the heat due to friction. Yes, metal spinning is potentially dangerous, just as working with any machinery can. Many wood turners like to get their hands involved when turning wood. This is a habit that must be resisted, for a metal disc spinning at about 1000rpm is basically a blade, and spinning metal can create some very sharp edges on the disc. Turning metal on the wood lathe can also be done, but it is advisable to only turn non-ferris metals (not steel). I have turned several metal items on the lathe, using the standard wood turning chisels, the most complex being a "shot cup" of brass. I was able to turn it to look like the tapered goblets that I perform with, just tall enough to allow the chop cup to make the ball vanish from the foot of the shot cup. The taper of the cup was perfect so that I could use the cup as a non-m******c chop cup. Worked very well, but found that I had gotten the top edge of the cup too thin when I realized that dislodging the ball from the cup was causing the top edge of the cup to buckle. I went to buy another 1.5" brass rod to turn a replacement, but found that because of the rise in the price of copper, the Metal Supermarket was charging about $35 for a 2" long blank. (Wow.) Turned the replacement out of sycamore, cutting two dados to inlay copper leaf to match the larger cups. As always, use good judgment and proven safety practices when using any power tools. |
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