The present invention relates to a key duplicating machine (1 ), preferably of laser keys or dimple keys. A key duplicating machine comprises a support structure (5) defining an alignment plane (XY), a feeler assembly (10) and a cutter assembly (20), which are movable with respect to said structure (5) from and towards the alignment plane (XY). The feeler assembly (10) and said cutter assembly (20) each define a longitudinal axis (Z1; Z2) for a feeler tool and a cutter tool, respectively. The feeler assembly (10) and the cutter assembly (20) comprise respective grasp members (140, 240) adapted to hold said feeler tool (19) and said cutter tool (21 ), respectively, and respective actuators (150, 250) adapted to control said respective grasp members (140, 240) to release said feeler tool (19) and said cutter tool (21 ), respectively.