Tool holder interface of a machine tool, tool turret and tool holder for live tools

Tool holder interface of a machine tool, the tool holder interface configured to mount a tool holder with a tool for machining operations, the tool holder interface including,

• an interface body having at least one connecting slot for replaceably mounting a tool holder to the tool holder interface of the machine tool,
• a transmission shaft arranged at the connecting slot, wherein the transmission shaft is configured to transmit a drive torque to the mounted tool holder,
• wherein the transmission shaft has a torque receiving-side section for receiving the drive torque and a connecting-side section for connecting to the mounted tool holder,
• wherein at the connecting-side section a first gearing for transmitting the drive torque to a corresponding tool holder gearing of the mounted tool holder is provided and
• wherein at the torque receiving-side section a contacting part is provided for receiving the drive torque of a drive unit of the machine tool,
• wherein at the connecting-side section of the transmission shaft at least one mating surface is provided and the mating surface is arranged to contact to a corresponding outer contact surface of the mounted tool holder for interacting with the tool holder to remove a gap between the first gearing and the corresponding tool holder gearing of the mounted tool holder.