TRANS-BAR machines are multi-spindle CNC transfer machines fed by non-rotating bars, ideally suited for the machining of turned parts on both directions and/or transversally in one single chucking; without costly secondary operations. Although these machines are quickly re-tooled like a two-spindle CNC lathe, they offer higher productivity than a multi-spindle screw machine, and even allow the complete processing of those parts that cannot be finished on lathes by re-chucking; either to complete second end, or transversal machining operations.