Drill press by david j. gingery
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Look into draw filing as a faster alternative. When you get to the part where you're fitting the ways to the bed, you may be scraping. Really fun and you can divert the exit heat to a barbeque. I did some sand casting of aluminum and bronze with a charcoal furnace. Skipping the charcoal furnace will make things easier. That seems like a lot more metal than 50% more than the base gingery design, but you probably have more plans after the lathe is done.Īnd above all, have fun! It's a fantastic project. Then I saw molten aluminum hit bare concrete and explode due to the moisture content.Ī metric ton of ingots. I always thought is was just to contain spills. We poured aluminum in my metal shop class over a sandbox 12" deep, over a concrete floor.
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You may want/need extra ventilation.Īlso, pour over dry sand. Melting aluminum pistons in your electric furnace doesn't present much toxic gas issues. Read the Material Safety Data Sheet for that alloy. I'm not religiously devoted to any of the specifics in the Gingery design - I'm happy to devour and plagiarise any and all good ideas that will make the end result perform better or look nicer. If there's interest, I'll be sure to post some updates along this journey - starting probably with some CAD designs of the project. For a quick starting point, there's an old model in grabcad based on the books' drawings. However, I thought I'd throw out this open call to the community here in case somebody else has been looking at this before or would like to have a go at armchair lathe design :). There's been some efforts at various stages to improve on the lathe design itself - I've been scouring the internet for these for the past months. Side effect: I get a more usefully sized minilathe. Real handy, given the yanks' love of fractions. More precisely, 1 gingerian inch will be converted into 4 sensible centimetres. It's also got a heck of a lot more mass than alu.Ģ) I am scaling things up by about 1.575x. Two big changes I am making right off the bat to make things a bit more promising on that front:ġ) I am replacing the scrap aluminium with commercially produced, analysis-verified ingots of the ZL-12 alloy that has great bearing and vibration damping properties. Whether I can even beat the China lathes in my size class in end product remains to be seen. It isn't some misguided attempt at getting a lathe "the easy" or "the cheap" way :) And in anticipation of the likely thought in some of your heads - this is about the bootstrapping adventure, the side product of which is as good a lathe as I can reasonably make. I've embarked on the long and hard ride of building a lathe "from scrap", broadly following David J.