ATESTEO torsion test benches with servohydraulic test facility

Components subjected to torsional stress are exposed to heavy strain day in and day out. To withstand this strain, durability (endurance) and breaking load can be tested in the early stages of vehicle development at the ATESTEO torsion test benches. Depending on the kind of torsion test bench, the parameters torque, angle of rotation, and frequency of vehicle components and other industrial components are measured.

At ATESTEO, component testing can be conducted on two different types of torsion test bench, depending on customer requirements. The servohydraulic torsion test bench for torsional loads can also generate less torque owing to its advantageous drive, allowing higher angels of rotation to be tested. The servohydraulic torsion test bench for linear loads permits testing of smaller angles of rotation owing to its high torque.

Component testing on the ATESTEO torsion test bench:

  • Testing of individual components from machines, equipment, and vehicles
  • Torsional and linear load tests
  • Flexibly adaptable test bench design
  • Possibility of multiaxial loads
  • Flexible adaptation of the test bench control
  • Flexible measurement data acquisition of up to 32 channels
  • Extensive choice of state-of-the-art measurement technology
  • Possible installation of strain gauge measurement points
Torsion test bench in in different designs for testing torsional and linear loads

Servohydraulic torsion test bench for torsional loads

The servohydraulic torsion test bench from ATESTEO permits accurate, this energy-efficient, testing of industrial components and components from vehicles. The servohydraulics create a variable speed system that permits low rotational speeds in addition to higher ones. The hydraulic supply of the torsion test bench is provided by a 91 litre/minute pump unit with 280 bar operating pressure and an upstream conditioning unit with two pressure accumulators. The servohydraulic torsion test bench from ATESTEO is additionally equipped with a Roell Amsler K7500 digital control system for servo drives.

Components tested on the torsion test bench

On the ATESTEO torsion test bench, a wide variety of components can be tested for their torsional load. Whether for automobile manufacturers, developers of transmissions and other vehicle components, or manufacturers of components for various industries — our servohydraulic torsion test benches can be used as you like for many customer requirements.

Testing vehicle components on the ATESTEO torsion test bench:

  • Clutch plates, clutch discs
  • Dual mass flywheels
  • Drive shafts, ball-and-socket joints
  • Cardan shafts, Cardan joints, universal joints
  • Hubs
  • Crankshafts
  • Transmission shafts, gearbox shafts, gear shafts
  • Differentials, differential gears
  • Flex discs, giubos
  • Transmission housings, gearbox housings
  • Stabilizers, anti-roll bars

Testing additional components on the ATESTEO torsion test bench:

  • Any shafts and axles
  • Tubes and pipes
  • Spindles
  • Torsion bars
  • Clutches
  • Threaded drives
  • Gear teeth
  • Flanges
  • Mounting and fixing elements

Test set-ups on the torsion test bench: case studies

Fatigue test of a drive shaft

  • Fatigue test on a coaxially tensioned drive shaft
  • 300,000 cycles / 2Hz /± 1296 Nm
  • Data acquisition (recording) of angle of rotation and torque (10 kNm torque measuring shaft)

Fatigue strength testing of an articulation

  • Strength testing of a drive shaft mounted (clamped) under articulation (10°/40°)
  • Dynamically surging application of a load to specified torques, finally to fracture
  • Data acquisition of angle of rotation and of torque (10 kNm measurement shaft)

Characteristic curves of a clutch disc

  • Determination of the characteristic curves of the pre-dampers and main damper springs of a clutch disc
  • Mounting through clamping the friction lining
  • Data acquisition (recording) of the rotational angle and torque through an additional 50 Nm/500 Nm measurement shaft

Characteristic curves of a dual mass flywheel

  • Determination of the characteristic curves of the pre-dampers and main damper springs of a dual mass flywheel
  • Dynamically surging application of a load to specified torques, finally to fracture
  • Data acquisition (recording) of rotational angle and torque (10 kNm measuring shaft)

Friction testing of a dual mass flywheel

  • Friction testing of a dual mass flywheel with overlapped axial load (clutch actuation)
  • Additional capturing and recording of torque (50 Nm measuring shaft) and axial force
Fatigue test of a drive shaft at the ATESTEO torsion test bench
Strength testing of a drive shaft at the ATESTEO torsion test bench
Determination of characteristic curves of a clutch disc on the ATESTEO torsion test bench

Performance characteristics of the ATESTEO torsion test bench

Torsional actuator

Static torsional moment (torque) 10.000 Nm
Dynamic torsional moment (torque) 8.000 Nm
Frequency range 0 – 50 Hz
Minimum load rise time 0,009 s/kNm
Maximum angle of rotation + 50°C

Angle sensor

Manufacturer Wachendorff
Operating principle incremental transducer (transmitter)
Measuring range + 110°
Resolution 0,01 °

Torque measuring shaft

Manufacturer Hottinger Baldwin Messtechnik
Operating principle strain gauges
Measuring range + 10.000 Nm
Linearity deviation 0,02 %

Temperature measuring point

Manufacturer Optris GmbH
Operating principle contactless over infrared
Measuring range -50°C to +900°C
System accuracy ±0,1 % or ± 1°C

Control / recording of measurement values

Type of control digital
Function (waveform) generator sine, sawtooth, rectangular, or triangular
Signal processing two AC channels and two DC channels
Measurement value acquisition PC with analogue devices card RTI-815F
Measurement points (standard) torsional moment (torque)/angle of torsion, two temperatures
Measurement points (additional) expandable up to 32 channels, e.g., strain gauges

Servohydraulic torsion test bench for linear loads

The servohydraulic one- or co-channel linear test bench from ATESTEO is used for special customer requirements — especially when it comes to testing tasks with a high torque of up to 20 kNm. It has a freely programmable PDES test bench control system for automated operation of the torsion test bench. The hydraulic supply is provided by a 4 litre/minute pump unit with 280 bar operating pressure and a pressure accumulator. Through extension with a torsion device, static and quasi-static torsion tests up to a torque of 20 kNm can be carried out.