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Form tester for large workpieces

The RONDCOM 55 universal form tester is designed to handle large workpieces weighing up to 60 kg. It enables measurement of roughness in addition to the form measurement.

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RONDCOM 55 is a highly accurate, rigid form tester with a rotary table on air bearings for workpieces up to 60 kg. A rotary table on air bearings is wear-free and does not come into contact with the system, meaning that drive vibrations do not affect the results. Air bearings do not need to be lubricated. The maximum possible rotational accuracies can only be achieved with air bearings. Fully automatic CNC orientation of the workpiece in less than one minute ensures effective measurements. High-performance servomotors control the necessary tilt and centering of the workpiece automatically. The patented CNC offset probe holder also enables the measurement of otherwise difficult to reach features with short, accurate styli. The offset probe holder enables collision-free measurements below the R axis. The sensor can be moved to the feature fully automatically. The stylus movesaround the tip – travel along the R axis is minimal; the procedure is faster and more accurate. RONDCOM 55 can be optionally used for roughness measurements in the Z and R axial direction.


  • Universal form tester with best rotational error in its class
  • Highly accurate, wear-free rotary table on air bearings for workpieces up to 60 kg
  • Higher throughput thanks to fast, automatic alignment in less than 60 seconds
  • Large deflection range of 2000 µm and high resolution of the IMR sensor of 2 nanometers for higher throughput and fast, automatic alignment
  • IMR sensor with safety function in all orientations for maximum protection of the stylus and sensor
  • High Z axis straightness of 0.15 µm (100 mm)
  • Optional linear scale for highly accurate measurements in the R axis direction


RONDCOM 55 is a universal form tester for the analysis of roughness, cylinder form, perpendicularity, parallelism, straightness, flatness, coaxiality, concentricity, thickness error and radial runout. With rotational error of just 10 nanometers, RONDCOM 55 is ideal for a wide range of precision parts that have a maximum diameter of 600 mm and weigh up to 60 kg.