I belong to that group, there is some interesting information there. I was under the impression that during WWII using concrete in casting large machine parts was used because of lack of raw materials, and fairly common. I've always thought it would be fun to experiment with this technique, not only for a lathe but for a mill as well.
Chris > There is a yahoo group re-developing making a lathe from concrete. > They are baseing their stuff on a guy that made lathes for turning > large projectiles for the Navy. He had a couple of patents. > Basically he had a jig to hold his metal pieces that define the > critical dimensions. He poured the lathe, waited a couple of days, > un-did the forms. installed the jig and some metal pieces, then > poured a low temp metal alloy he developed (formula is lost) that > didn't shrink or expand when cooled to hold the metal pieces in place > in the concrete. > > Anyway, email me directly if you want to get the link to the group (I > just don't have it at hand or I would put it here). > > ... Jack ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
