The 5th axis adapter attaches to the 4th axis and allows a second rotary axis to be installed orthogonal to the 4th. On the H4 machine, this results an an A-C 5th axis setup. The resulting 5th axis can be used with the rotary vise, ER32 collet adapter, or a print bed for workholding and part processing. The counterweight balances the rotary axis and includes an M5 threaded hole for finer adjustment with heavy stock.