The BERG clamping force measuring system for the tool holders is designed for force measurement when the spindle is stationary! The measuring system consists of a handy sturdy display device in pocket calculator format and the measuring equipment required for the various application. The measured data can be transferred to any PC via a serial standard interface and represented in y/t. The measuring system includes a practical case for accommodating the display device, the measuring equipment, the charger and the connect ing cable.