A set of compaction rams and/or die-plates for a tabletting machine has all of the compaction rams and/or die-plates of the set furnished with a code containing at least the following information: (a) a label for the set of compaction rams and die-plates; (b) an individual label for each compaction ram and/or die-plate within the set; (c) data effective to critically dimension the compaction ram and/or die-plate which contains the code; and (d) data containing service life information for the compaction ram and/or die-plate which contains the code.