Automatic tool changer

Tool changing device for tool systems, in which tool head (18) and tool holder (17) are connected by an automatic clamping unit with integrated clamping screw, consisting of a multi-axially movable lifting carriage (1) on which a rotatably mounted, motor-driven pivot arm (2). The swivel arm (2) has at its free end a gripper holder (4) with at least four tool places and an integrated clamping bit shaft (5). The Spannbitwelle (5) is provided at both ends with a profile (9), which can transmit torques. The Spannbitwelle (5) can be moved axially so that it can be coupled both left and right ax with the clamping screw of a tool holder (17).