And it costs about one- tenth of the price.ĭelany is the creator of the low-cost screw-cutting lathe made from concrete and scrap metal. Vegetable oil with 10% acetone performs as well as WD-40 to free seized bolts. The impetus for their research was a collaboration between two key E4C members: Pat Delany, who is proving to be an idea factory at E4C, had the idea, and Alex Moseson, a professor of engineering at Drexel who develops technologies appropriate for emerging economies. They conducted side-by-side comparison tests of vegetable oil mixtures, WD-40 and automatic transmission fluid. That’s good news for people in rural developing areas where commercial lubricating sprays can be expensive, and vegetable oils are easy to find and even possible to make.Įngineering students at Drexel University in Philadelphia, Penn., made the discovery. And it costs about one-tenth of the price. Add more acetone, up to 30 percent, and the mixture works even better than WD 40 and still costs about one quarter the price of the commercial spray. A mixture of vegetable oil with 10 percent acetone, the active ingredient in nail polish remover and some paint thinners, works as well to free rusted bolts as WD 40. WD 40 lubricating spray may have some low-cost, do-it-yourself competition: vegetable oil and acetone.
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