Tool magazine shelf

A circular, annular tool magazine shelf of a tower construction, comprising:

• a base frame adapted for receiving
• a tool shelf which has a plurality of immovable tool deposit plates, arranged in vertical succession and in a circular ring, adapted for storing one or more machining tools, and
• a power-driven tool handling system adapted for transporting the one or more machining tools between the tool shelf and a machine-side pick-up tool magazine store;
• a spindle tower to which the power-driven tool handling system is attached, wherein the spindle tower is mounted rotatably about a vertical rotation shaft that is arranged at a center-point of the circular ring, wherein the base frame includes a monolithically constructed, plate-shaped foundation in which the vertical rotation shaft is mounted by way of a mounting arrangement,
• wherein the mounting arrangement includes a non-rotatable outer ring, which is provided with external toothing and is fixedly attached to the foundation, and an inner ring, which is fixedly attached to the spindle tower, and
• a first drive motor having a drive pinion for driving rotation of the spindle tower, and the first drive motor is rigidly attached to the spindle tower and operatively connected to the external toothing of the outer ring in such a way that when the spindle tower rotates, the drive pinion rolls together with the drive motor on the external toothing of the outer ring.