Our highly qualified experts develop and operate test systems for qualifying wheels, tyres, wheel bearings, drive flange hubs and brake discs.
On our flat track tyre test bench, tyres are exactly measured, characterised and parameterised. On the drum test bench we perform endurance tests and cleat tests. AKR test cycles or individual BLNVs are run on the biaxial wheel test bench (ZWARP). Our second ZWARP, the BSP (brake disc test bench), is equipped for testing brake discs and has a much higher performance. It permits you to simulate variable driving speeds and controlled braking torque. The axle drive dynamics test bench (FDAP) is used in our test centre for simulating operational loads under even more realistic conditions in combination with the vehicle axle.
Specially developed test benches like the 'radial' impact test bench (in compliance with AKR specifications), are used for pre-damaging wheels and testing failure behaviour when driving over obstacles or through potholes. Our test bench portfolio also includes two wheel bearing test benches, three rotating bending fatigue test benches for wheels and wheel bearings, a centrifugal test bench (brake discs) and two impact test benches for simulating exceptional and misuse loads.
Biaxial wheel test bench (ZWARP) and brake disc test bench (BSP)
- Testing the fatigue strength of wheels and brake discs in operational load simulation trials
- Dynamic loading of lateral and radial forces.
- Simplified simulation of endurance tests, for example extreme driving tests on the Nordschleife (North loop) of the Nürburgring race track in Germany (lateral force through thrust rings, managed and controlled impact in optimum emulations of loads locally exerted in the wheel)
Technical data
- AC asynchronous motor, 65 kW (ZWARP) and 166 kW (BSP)
- Internal diameter: 1050 mm, depth 740 mm
- Thrust rings: gap variable from 160 mm to 300 mm
- Test items: Maximum radius: 440 mm
- Maximum tyre width: 315 mm
- Maximum force: static 40 kN, dynamic 25 kN
- Camber angle adjustment: from -15° to +15°
Axle drive dynamics test bench
- Testing the fatigue strength of wheels, brake discs and multiple components together in operational load simulation trials
- Dynamic loading through steering and braking manoeuvres, road surface unevenness and load change reactions
- Simulation of vertical, rolling and steering movements of the vehicle in real time
- Realistic simulation of endurance tests, for example extreme driving tests on the Nordschleife (North loop) of the Nürburgring race track in Germany (lateral force through camber angle, impact according to axle kinematics)
Technical data
- Drive: two DC shunt motors (each 300 kW nominal output at 400 V).
- Acceleration: 0 – 100 km/h in 2.1 s; 0 – 308 km/h in 8.6 s
- Deceleration: 100 – 0 km/h in 1.9 s; 308 – 0 km/h in 8.2 s
- Rolling drums: external diameter 2000 mm, track width 600 mm
- Hydraulic cylinders: 2 servo-hydraulic linear cylinders (stroke 250 mm, nominal load 40 kN)
- 1 servo-hydraulic rotary cylinder for steering wheel operation
- Brake pressure unit: operating pressure 200 – 250 bar with ABS controller
Radial impact test
- Testing of fatigue strength and failure behaviour under impact loads
- Radial impact test on car wheels with tyres
- Testing the fatigue strength of rims for fracture (e.g. when driving through potholes).
- Preloading of wheels with impact loads for subsequent fatigue strength tests
- Impact loading on motorcycle forks
- Impact loading on axle guides
Technical data
- Maximum drop height: 6 m
- Impact energy: 1,471.5 J at height of fall of 1m
- Fall velocity: 4.43 m/s at height of fall of 1m
- Maximum impact force: 100 kN at centre of fin
- Fin angle: 150° (variable)
- Fin dimensions (W x L): 195 x 500 mm
- Wheel camber angle: 1° (variable, 0 – 3°)
- Wheel mount stiffness: variable
- Swivel with additional weights for up to 350 kg
Impact test
- Impact test in compliance with ISO 7141
- Misuse test (side impact against kerbstone)
Technical data
- Fall weight: 465 to 975 kg (according to vehicle weight)
- Height of fall: 230 mm
Wheel bearing test stands
- Servo-hydraulic biaxial test bench for service life testing of car and SUV wheel bearings
- Signals: block programs with variation of vertical and lateral force at point of wheel contact and velocity
- Measured variables: force, path, temperature and vibration
- Test items: 2 or 4 wheel bearings built-in using adapters or original mounting components
- External heating of bearings (optional)
- Examination of bearings (ball bearing track, grease analysis, etc.)
- Additional mud testing with Arizona dust, salt and water mixture (optional)
Technical data
- Maximum radial load: ±40 kN
- Maximum axial load: ±25 kN
- Maximum speed: 1,600 rpm
Rotating bending fatigue test benches for wheel bearings
- Single-stage test for checking fatigue strength of drive flange hubs and wheel bearing units
- Loading through rotating bending torque until failure becomes apparent through cracks and/or fracture
- Crack testing with liquid penetrating test
Technical data
- Rotating unbalance with variable lever arm and weight for different bending torques according to vehicle type.
- Maximum bending torque: 6,000 Nm
- Speed range: approx. 1,000 rpm to 2,500 rpm
- Cooling with compressed air
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