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Message:: [QUOTE="Tom Maringer, post: 2707343, member: 7033"]I need to find some books on old-timey engineering. The problems we face include such things as: when is grease better than oil in a bronze journal bearing? If oil... how heavy of a weight? When a bearing is worn such that it starts thumping as pressure is placed and released, how do you decide when it's time to re-sleeve? (I was able to slip a 0.002" teflon shim into it, but not a 0.004" one) We're just stumbling along by trial and error with this stuff, hoping we don't do something terribly wrong. There may be some old guys still kicking that worked with maintaining these presses, I would love to sit and talk with them a while. I'm sure there were some tricks and tips we would love to know about. My wife is encouraging me to write a book because there is so little in print. Denis Cooper's THE ART AND CRAFT OF COINMAKING is the best one I know, and it's a great start, but it does not get into the nitty gritty details of tonnages and so forth. But I'd have to learn a lot more before I'd feel qualified to write a book.[/QUOTE]