General tips on milling/turning copper Practical Machinist
27/04/2012#0183;#32;General tips on milling/turning copper Hi, I''m a grad student with some basic machining experience, and I''m starting a project that requires some pieces to be machined out of OFHC copper (it has to be the high purity stuff for the best thermal conductivity and the fewest magnetic impurities) on both the lathe and mill.