A high performance 11-axis CNC system from NUM has enabled machine tool manufacturer Sicmat to create a gear honing machine for posthardening fine finishing. The company claims that by using a new honing wheel with external teeth, and an ultra-precise application-specific CNC program developed by NUM, the Grono 250 machine provides the accuracy of gear shaving – but in a process that is applied after the gear has been case hardened – and eliminates the need for shaving and grinding stages.