Information on the most widely used ASTM standards within the materials testing industry
Model: UT1021, dynameter test
Mechanical shock absorber fatigue dynameter testing machine is a device used to test the performance of shock absorbers. It evaluates characteristics such as performance and durability by simulating real working conditions. By applying periodic loads or displacement excitations under simulated vibration and impact conditions, it checks for performance degradation, oil leakage, structural damage, and other issues to assess fatigue life and reliability.
Its core components include a vibration table (to simulate the vibration environment), a control system (to adjust frequency/amplitude), a load sensor (to monitor force changes in real time), and testing software (to record and analyze data).
General introduction
Mechanical shock absorber fatigue dynameter testing machine is a device used to test the performance of shock absorbers. It evaluates characteristics such as performance and durability by simulating real working conditions. By applying periodic loads or displacement excitations under simulated vibration and impact conditions, it checks for performance degradation, oil leakage, structural damage, and other issues to assess fatigue life and reliability.
Its core components include a vibration table (to simulate the vibration environment), a control system (to adjust frequency/amplitude), a load sensor (to monitor force changes in real time), and testing software (to record and analyze data).
Its main function is to simulate the load conditions that a shock absorber might encounter in actual use, and to test the service life and performance of the shock absorber. This equipment can carry out high-frequency, long-duration load tests on shock absorbers, thereby evaluating their durability and reliability. In this way, shock absorber manufacturers can gain a comprehensive understanding of their products’ performance and make improvements before launching them on the market, ensuring product quality and enhancing brand reputation.
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Key Features
1, Base: the use of industrial grade groove steel and steel plate welding machine and grow square frame, welding channel uniform and beautiful. Have sufficient strength and stiffness to ensure safe operation
2, Upper beam and lifting mechanism: composed of beam, two beam guide column, two lifting hydraulic cylinders, beam locking mechanism, hydraulic pressure, etc. The hydraulic cylinder drives the beam up and down and hydraulically automatically locks in the stop position, thus controlling the installation height of the equipment so that the test stroke is located in the middle of the shock absorber stroke.

3, Piston rod top tight and pull-back mechanism: by hydraulic cylinder, guidance and connection mechanism, force sensors and fixtures, etc. , to achieve piston rod clamping back to the working position.
UnitedTest Shock absorber fatigue testing machine is a single station operation, the whole is a vertical two-post structure, by the seat, upper beam and lifting mechanism, damping force detection system, drive mechanism, shock absorber cylinder barrel pressure mechanism, demonstration and fatigue tooling, hydraulic system, collection card, computer, industrial control software and electronic control system, quick plug connector and so on.
1, Damping force detection system: consisting of force sensor and manual clamping device. Force sensors are used to monitor the tensile and compression force values during the movement of the workpiece in real time.
2, Drive mechanism: by the servo motor, gearbox, tooth belt, toothed belt wheel, housing, spindle, crank, slider and guide device. The motor gearbox provides power for the moving part. The power is transferred to the crank slider mechanism via the drive of the profile band and spindle to drive the workpiece to sine motion.
3, shock absorber cylinder pressing mechanism: by the displacement sensor, pressure cylinder, press-up plate, guide column, base and so on. The cylinder drives the slide on the upper pressure plate to achieve the pressure on the shock absorber cylinder barrel. Monitor the guide's press-mounted travel in place via the displacement sensor.
4, Dynameter test tools: by the shock absorber ring fast clamping workwear and shock absorber cylinder pressure assembly composition, workwear using a quick change structure. The upper hanging ring adopts the general structure, puts it manually, and uses the mechanical step-up two kinds.
ISO Standards
ISO 6312:2010: Performance requirements and test methods for road vehicle shock absorbers.
ISO 11443:2018: Vehicle suspension vibration test methods.
ISO 1099: Axial fatigue testing of metallic materials (equivalent to DIN 50100, ASTM E466-15, etc.)
ASTM Standards
ASTM E466-15: Standard practice for axial fatigue tests of metallic materials under controlled force amplitude.
ASTM D3479: Standard test method for fatigue testing of composite materials.
Other Standards
SAE J2521:2010: Durability test procedure for shock absorber systems.
GB/T 29238-2012: Durability test methods for automotive shock absorbers in China.
Using electro-hydraulic servo technology or mechanical excitation methods, the damper is driven to reciprocate through a crank-slider mechanism or an electromagnetic speed-regulating motor, simulating compression and rebound strokes. During the test, sensors collect data such as force and displacement in real time to generate a damping force-velocity curve.
Widely used in automobile/motorcycle manufacturing (ensuring shock absorption performance), research institutions (promoting technological development), and quality control (ensuring product reliability).
1, Automobile manufacturing: Testing the comfort and stability of shock absorbers for cars, SUVs, MPVs, and other vehicle types.
2, Motorcycles and construction machinery: Verifying the reliability of shock absorbers under complex road conditions.
3, Research and development: Providing data support for the optimization of shock absorber design.
Main Functions
Supports durability testing (long-cycle vibration simulation), performance testing (damping force, stiffness measurement), and temperature characteristic testing.
Dyno characteristic testing: Measures the change in damping force of the shock absorber at different speeds.
Durability testing: Simulates the performance degradation of the shock absorber after long-term use.
Speed characteristic analysis: Evaluates the shock absorber's response capability at high or low speeds.
Internal friction resistance measurement: Detects the impact of internal friction on the shock absorber's performance.
Main technical specification
| Main test load | 30KN |
| Speed | Can be adjusted between 0.01 to 0.52m/sthe motor is servo motor, higher precision, through the controller can set the desired speed, but also set shortcuts, to achieve common speed of use convenience. |
| Stroke | 0~100mm adjustable, display test stroke |
| Maximum damping force | One pc, 30000N at 0.52m/s |
| Beat | Two speed points ≤ 12 seconds per piece |
| Test Accuracy | 1%FS |
| Test Space | 900mm |
| force sensor (range 3T) self repeat accuracy of 1% FS | |
| displacement sensor range: 0-100mm, its own repeated positioning accuracy ≤ 1% FS | |
| can set the force value upper and lower limit, unqualified screen alarm | |
| can set the guide pressure displacement upper and lower limits, unqualified screen alarm | |
Main accessories (Standard delivery with machine)
| Item | Quantity |
| Frame | 1 set |
| Load cell (30KN) | 1 set |
| Servo motors and drive systems | 1 set |
| Planetary gearbox | 1 set |
| Blade pump | 1 set |
| Solenoid valve | 2 sets |
| Temperature sensor | 1 set |
| Hydraulic top cylinder | 1 set |
| High-precision load sensor | 1 set |
| Displacement sensor LVDT | 1 set |
| Board controller | 1 set |
| Control software | 1 set |
| Documents (Manual, packing list, certificate) | |
Hinged bearings are connected to the ears on both sides via the pin shaft and secured by the reed.
Dynameter test curve
Application of Shock Absorber Fatigue Testing Machine in Product Design
The shock absorber fatigue testing machine plays a significant role in the automotive parts manufacturing industry.
Manufacturers can use this equipment to conduct comprehensive performance tests on shock absorbers, thereby improving product design and enhancing product quality. Before products are released to the market, the shock absorber fatigue testing machine can help manufacturers identify and address potential performance issues, reducing the risk of product failures in actual use.
At the same time, the shock absorber fatigue testing machine can provide detailed data support for R&D personnel to further optimize product design and improve the performance of shock absorbers. This is of great significance for manufacturers, as it can not only enhance the market competitiveness of their products but also provide consumers with safer and more reliable automotive parts.
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