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The new Type 9171A  rotating, cutting force dynamometer (RCD) from Kistler Instruments is designed to accurately measure the high forces acting on a rotating tool during high-performance cutting (HPC) operations.

Mounted on the machine spindle in place of the normal toolholder, the RCD measures three forces and rotational torque even under very heavy loads at up to 12,000rev/min, allowing machining processes to be analysed and optimised for minimum tool wear. The new, four-component piezoelectric force sensor minimises the effects of centrifugal forces and powerful system electronics deliver excellent signal quality. Non-contact signal transmission eliminates wear and ensures a long, maintenance-free life.

According to the company, the Type 9171A RCD is both lightweight and robust, allowing operation at twice the spindle speed of previously available types and precision measuring of forces up to 30kN and torque up to 1,000Nm. The high rigidity and natural frequency of the dynamometer makes it especially suitable for HPC applications where a high volume of material is removed in a short time.

Further features and benefits

  • The large measuring range and the compact design make the RCD suitable for use with HSK-A100 and Capto C8 spindle interfaces often used in HPC operations.
  • A wide range of spindle adapters and toolholders are available, all of which may be interchanged by the user, allowing the Type 9171A RCD to be used on a variety of machine tools.
  • The associated signal conditioner provides system control, power supply and interface to the Kistler DynoWare software or other compatible data acquisition system. The output is available as an analogue ±10V signal. 

Kistler Instruments

Established in Winterthur (Switzerland) in 1957, the Kistler Group now has a worldwide presence with 23 group companies and 30 distributors ensuring prompt, local application support and short delivery times. With a staff of more than 1,000, the Kistler Group is one of the world’s leading providers of dynamic measuring instrumentation.

Kistler’s core competence is the development, production and use of sensors for measuring pressure, force and acceleration.  Kistler’s know-how and electronic systems can be used to prepare measuring signals for use in analyzing physical processes, controlling and optimizing industrial processes, improving product quality in manufacturing and improving performance in sports and rehabilitation.

Kistler offers a comprehensive range of sensors and systems for engine development, automotive engineering, plastics and metal processing, installation technology and biomechanics.

Heavy investment in research and development, 15% of staff worldwide are engaged in research and development, has generated a number of innovations using piezoelectric, piezoresistive and capacitive techniques to provide solutions to numerous force, pressure and acceleration measuring problems. These innovations include the world’s first commercial quartz sensor, two-wire constant current technology to integrate sensors with microelectronic circuitry, high-temperature pressure sensors for use up to 400 Deg C and three-component force measuring sensors.

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