Verktygshållare

摘要

Present invention relates to a rotary tool holder comprising a holder for fixing a tool (6) and a moment defining and rotary detaching unit. The moment defining and rotary detaching unit comprises a magnetic based torque sensor (1), connected to a circuit that compares a first outgoing torque related signal with a second outgoing torque related, and/or produce a first and a second outgoing torque related signal. The tool holder is arranged to stop the rotation of the tool holder at a maximum achieved torque.