jdbondy Posted July 7, 2016 Share #1 Posted July 7, 2016 My model of Pride of Baltimore 2 requires some thimbles. The model is in 3/16" scale, so the thimbles would have to be pretty small. I tried cutting segments of 1/16" brass rod with a Dremel cutting wheel and peening them with a jeweler's punch, but the results were not consistent or satisfactory. I recently acquired a Sherline metalworkers lathe, used and at good cost. So I am finally having to learn how to properly use it for metal turning. To this point I have only used it to turn some wood pens. So the first step was to clean the sawdust out of all the crevices of the lathe... I purchased 3/16" brass rod stock and cut off a suitable length (about 2"), then faced the cut surface smooth. (Oh, to get to this point, I had to learn how to grind my own cutting tool, then mount it so it was at the appropriate height. A process in and of itself.) Then I used a center drill to just barely touch the surface and create a dimple so my smaller drill bit wouldn't wander when drilling a center hole. I used a 0.031" drill bit (which required purchasing the small collet that accommodates such small bits, yet another step...) to drill a depth of about 0.1". I turned the outer dimension to 0.050", then used a triangular file to carefully file a groove into the outer surface of the cylinder near its end. Then I parted off a thickness around 0.025-0.030". Getting to this point required extensive trial and error as I learned how to eliminate vibration of the parting tool so it wouldn't fracture the cylinder instead of parting off the final product, and also learned how to adequately sharpen the cutting and parting tools. But it was worth the effort to get such a consistent product. Three photos are attached, the final picture obtained after blackening with Birchwood Casey. Thanks for the tip, Dr. Toni Levine! JD mtaylor, Canute, dgbot and 4 others 7 Quote Link to comment Share on other sites More sharing options...
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