Abstract: A device and method for calibrating swivel assemblies (21), particularly on cutting machines. Calibration of a tool on the machines mentioned above, portal robots, and the like, to the so-called Tool Center point (TCP) is done by a single movable measuring tip on the device, which has a direct operational connection of the tool, and a soft-ware-controlled measuring method for recording and repeatability of initial positions of a tool to be optimally adjusted. Determination of the TCP can be necessary after maintenance and repair work or after collisions on a machine tool or cutting machine. The device for calibrating swivel assemblies (21) includes a combination, as viewed from the frame (1), of three members, a first member (3), a second member (4), and a third member (5), displaceably connected among each other, with no play, to the frame (1) with no backlash by sliding joints (12, 13, 14) in all three axes of a Cartesian coordinate system.