> I've made gears and gear boxes of plexiglass like you are > referring to using laser cutters and waterjets Thanks. I'm still waiting back for a couple of responses. Why such a simple line of enquiry has gone pear-shaped I don't kn....well, actually I do know exactly why. I'd be surprised if this didn't end up with me getting very ticked off after 4 days and talking to someone's manager > And glycerin makes a nice clear lubricant for the gears once it is > assembled Probably won't use a lubricant as the speed will be low and also don't want to retain dust and fluff. Perhaps a little on the teeth faces if (I ever get these made and) they haven't got a smooth finish Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .