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Torque and Force Contactless Sensor System


Together with a rotor and a stator, the DDU-4 measuring transducer forms a sensor system for contactless torque and axial force monitoring. The sensor of the system, which is designed as a cylindrical rotor based on the application of strain gauge technology, is attached to the tool-holder and firmly connected to it. It measures continuously and simultaneously torque and axial force values.

The preprocessing of measurement data and the tool-breakage monitoring both take place in the measuring transducer, which is the analyzing unit of the sensor system.


DDU-rotor and DDU-stator constitute a sensor system for contact-free monitoring of rotating and rigid tool holders. The sensor system is based on DMS technology. The rotor continuously measures the torque values acting on the tool as well as the feed forces. The transmission of the energy supply and the measurement data to the attached measuring transducer is carried out inductively via an air gap located between the rotor and a  stator (telemetrie).

Together with  a measuring transducer, the DDU sensor system can be used in combination with CTM and Genior Modular monitoring systems.

  • Highly sensitive measuring of torque and feed force on rotating and rigid tool holders
  • Identifies force deviations in tapping, drilling or threading processes
  • Generates alarms in case of broken, missing or worn tool (DDU stand-alone)
  • Can be used as a post-process measurement (go / no-go gage) to ensure the quality of threads
  • Used in stir friction welding applications or deburring processes (different industries)
  • Measures process forces in rotating assembling applications
  • 3 ranges for vertical force and 3 ranges for torque are calibrated
  • Strain gage sensor technology
  • Three measuring ranges for torque and 3 ranges for axial force  calibrated and therefore suitable for quality processes (QM)
  • Re-calibratable
  •  For single or multi spindle applications
  • Inductive signal transmission (standard)
  • Radio-based signal transmission (WISY)
  • Portable version of the DDU WISY system for mobile testing purposes


Data Sheet Flyer
English DDU: (471.09kB)
Italian - (0.98MB)
German DDU: (415.24kB)
French - (0.98MB)
Spanish - (0.97MB)
Japanese - (1.04MB)
Korean - (0.99MB)
Simplified Chinese - (1.05MB)
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