Runout Testing

Checking of radial and axial runout – portable, efficient and extremely accurate

With Hofmann’s portable RO 7000, you can measure the runout of rotors and other cylindrical parts. The RO7000 is as precise as with a coordinate measuring machine, but at a fraction of the price and with significantly reduced effort!

With the new, universal RO 7000, you can measure rotors and cylindrical components of any size precisely and with accurate angular reference. Our software completely eliminates the influence of shaft axis movements on the supports. In addition to determining the radial and axial runout, you can also measure the electrical and mechanical runout with the RO 7000. All this, with little effort, with commercially available magnetic stands and a portable, very easy-to-use measuring device.

Technical Data

All important information about our Portable Runout Testing System at a glance - The RO 7000 data sheet.

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Technical Paper

Request our technical article and read about the methods our software is using and how we reliably eliminate systematic measurement errors.

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Watch this video to see how easily and quickly you can measure the runout of a cylindrical rotor with the RO 7000.

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Your Contact

Do you have questions, or want to know whether RO 7000 is the right measuring system for you? I look forward to hearing from you.

Dipl.-Ing. Christian Sinik
Tel.: +49 6157-949-137
Mail: Christian Sinik

Portable Runout Testing System

Type RO 7000

Runout quantifies a shaft radial or axial difference between ideal and actual surfaces or lengths. Runout will be checked during manufacturing or repair of a rotating shaft. Hofmann’s Portable Runout Inspection System RO 7000 provides a solution to measure radial and axial runout of rotors and other cylindrical parts in multiple axial planes. During a measurement, a rotor will be supported for example in a lathe, in V-blocks or on rollers. Rotors may be rotated by a motorized drive or manually. The system consists of a measuring controller to be hooked-up to a PC, a sensor set and the measuring software Orbistar.

The Software makes the difference
Orbistar helps to setup a specific measuring task, acquires and displays the measuring data, provides tools for data analysis and generates complete reports. At the same time the software compensates for the common influence of the shaft axis movement on the measurement. Therefore, special data evaluation algorithms and the use of reference sensors are key. This yields results which are comparable across different measuring devices.
Runout will be measured using proximity sensors which are supplied with brackets that interface to standard magnetic bases. The angular position will be captured with an encoder wheel, which is driven by the rotor surface, or using a speed sensor.

Electrical runout measurement included
A special feature of the RO 7000 is its capability to measure electrical runout simultaneously with a tactile (mechanical runout) and an eddy current senor (total runout). The electrical runout is the difference between the total and the mechanical runout, i.e. the systematic measurement error of the eddy current sensor. This measuring value is useful when inspecting traces used for shaft vibration measurements.

Special features

  • Measuring of radial and axial runout
  • Measuring of mechanical and electrical runout
  • portable system for universal application
  • flexible und simple handling
  • compatible with Hofmann’s stationary Runout-Testing-Machines UHR
  • Measuring software Orbistar 2
    • simple and intuitive Windows software
    • ad-hoc or offline measuring setup programming,
      data analysis and report generation
    • simple exchange of measuring data between Orbistar users
    • csv-file data export
    • compensation of the shaft axis movement 
for comparable measuring results
    • compensation of lateral and axial rotor axis movement
    • display of measuring values as x-y or polar diagram
      or as 3D diagram with multiple polar diagrams
      referenced to an axial rotor coordinate
    • analysis of measuring data including order analysis, eccentricity etc.
    • report templates editable to suit customer-specific requirements


  • Measurement of radial and axial runout of rotors in
    • manufacturing
    • maintenance, repair and overhaul
  • Measurement of
    • mechanical runout
    • total runout
    • electrical runout
  • With precise angular reference checking of the runout of measuring traces used for monitoring shaft vibrations acc. to ISO 20816-1, API 610, API 612, API 617 or API 687

Your Contact

Dipl.-Ing. Christian Sinik
Product Manager High-Speed Balancing Installations

Technical Sales
Tel.: +49 6157-949-137
Fax : +49 6157-949-100