Product quality
on the test rig

Highspeed-FZG-gear tension rig

The high-speed FZG test stand is based on the standard FZG test stand. This is also a testing machine with a power circuit. The gearbox and the test gearbox are connected by a functional shaft train and a torsion shaft. There is a clamping clutch on the functional shaft train to apply the load. The torque is measured at the torsion shaft. The test stand is driven by a speed-controlled asynchronous motor.


The associated oil unit for injection lubrication has a cooling and heating system that keeps the test transmission oil at the desired temperature. The temperature of the gear oil can be preset and controlled. The FZG high-speed gear tension test rig was developed jointly by Strama-MPS and the FZG at the Technical University of Munich and is constantly being further developed together. A target speed of 22,500 rpm with up to 600 Nm at the pinion can be achieved.

Highlights and tests

  • High rotational speed at the pinion (22,500 rpm)
  • Sump-type and injection lubrication
  • Torque is generated manually
  • Individual oil circuits for drive and test gear boxes
  • Specific FZG test wheels can be used
  • DGMK 833 / FVA 988 I "E-Fluids@HighSpeeds"
  • Further test procedures in development at the TUM (FZG)
  • Structure-born sound vibration monitoring
  • Measuring data available as .tdms files
  • Adjustable limit value monitoring

Technical data and equipment

  • Max. Speed at pinion: 22,500 rpm
  • Max. torque: 600 Nm
  • Max. power in the torque circuit:
    • Actual: 754 kW (18,000 rpm & 400 Nm at the pinion)
    • Target: 1413 kW (22,000 rpm & 600 Nm at the pinion)
  • Gear ratio: 1.5
  • Centre distance: 91.5 mm
  • Ø shaft test gear: standard Ø30 mm
  • Oil temperature Transmission gearbox: Water-cooled
    • Efficiency: 60 °C...140 °C
    • Freshness test: depending on the power in the tensioning circuit
  • Test gearbox oil temperature: 60 °C...140 °C (regulated, cooled and heated).
  • Soaking temperature for injection lubrication: 60°… 140 °C
  • Oil flow: 0.3 - 5 l/min
  • Total space requirement (L x W x H):
    • Test stand: approx. 2.5m x 0.9m x 1.7m
      • Lubrication unit: approx. 1.4m x 0.95m x 2.2m
  • Weight of test stand
    • Test stand: approx. 3 tonnes
      • Lubrication unit: approx. 720 kg

Contact Person

Thomas Mühlbauer

COO BU Test Rigs

P +49 9421 739-277


Josef Urmann

Head of Project

Management & Sales

Tel. +49 9421 739-325