SRV Tester Overview
Main Features:
- 10 µm – 2.8 mm stroke / 0.1 mm to 5 mm stroke
- Up to 300/500 Hz oscillating frequency
- High-resolution piezo sensors
- Electromagnetic coils
- Room to 350°C (optional -40°C, 800°C) temperature
- 3000 N downforce
Rtec SRV test system measures friction and wear of lubricant, oil, grease, and additives in linear oscillatory motion. Generate data compliant with several ASTM, DIN, and ISO standards. Test collected samples from the field or for research purposes.
The SRV tester comes fully automated and computer controlled. The setup is easy to calibrate and comes with standard oil and samples. Additionally, it runs several standard test methods and allows for new custom methods. This insures for future petroleum product standards.
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SRV Test Machines Like No Other
This test method covers studying tribology between two contacting surfaces subjected to high-frequency linear oscillation.
Downforce Control
Real-time downforce control.
Voice Coil
Electromagnetic actuator to impart linear reciprocating motion. Dependent on the test-optional additional coils. These are available to double the friction force range.
High Accuracy Position Control
The most accurate and precise displacement control in the market. Up to 1nm resolution and micron level of accuracy.
Environmental Chambers
The wide temperature range standard room to 180°C (from -40 to 400/800 °C available). Closed-loop temperature control.
Flexure Design -Unmatched Waveform Control
Magnetic flexure design prevents friction of rolling or bearing. In addition, the coil controls the stroke by monitoring smallest of increments of waveform change.
Piezo Friction Measurement
FFT testers come with piezo sensors to measure real-time friction at high frequency. Ultra low noise amplifiers allows detection of minute changes in friction.
Additional In-line Sensors
Acoustic emission for detecting the onset of cracks. ECR measures surface resistance changes to gain more insight on the film thickness.
Liquid Containers, Sample Holder
Customizable liquid and sample holders for standard and non-standard tests.
Features
Next Generation
With stroke control from 10 µm, the Rtec Instruments SRV tester simulates many test conditions that are not possible using any other commercially available tester.
Traceable Friction Force
Calibrated friction force sensors to NIST traceable standards. This ensures correct absolute friction values.
Platform Rigidity
Vibration dampening frame, symmetrical design, and rigid samples holders yield a high system stiffness. This high rigidity facilitates the high repeatability of data and wear marks with ease.
Reliability On Long Runs
The unique flexure suspension guides the magnet assembly without contact or lubrication. Furthermore, the design eliminates performance degradation over time. Instead, It delivers near maintenance free operation.
Stroke control
Ultra precise stroke control allows simulation of many applications. Including studying oil starvation areas and fretting regimes.
Choose Your Model
Choice Depends On Multi Function vs. Single Function
Single Function Tribometer SRV Tester
Dedicated SRV tester for reciprocating friction and wear analysis
SRV Test on Multi Function Tribometer MFT-5000
SRV test on the MFT-5000 allows several other friction, tribology, wear tests on the same platform.
Data and Analysis
Custom and ASTM Standard Tests Available
Ball Wear Mark and Volume Wear
3D wear mark of ball surface after the test.
Real Time Friction and Downforce
Real-time friction and downforce data
Real Time Stroke Control
Real-time downforce and stroke control.
Table 1: COF values at different time intervals
| Test | COF_15 min | COF_30 min | COF_90 min |
|---|---|---|---|
| Test 1 | 0.061 | 0.0588 | 0.0589 |
| Test 2 | 0.060 | 0.059 | 0.061 |
Table 2: Wear Scar Diameter (mm)
| Specimen | Test 1 | Test 2 |
|---|---|---|
| Ball Horizontal | 0.4780 mm | 0.4233 mm |
| Ball Vertical | 0.4978 mm | 0.4083 mm |
| Disk Horizontal | 1.348 mm | 1.336 mm |
| Disk Vertical | 0.4273 mm | 0.4380 mm |
Several Applicable Standards
ASTM D5706
Standard Test Method for determining extreme pressure properties of lubricating greases using a high-frequency, linear-oscillation test machine
ASTM D5707
Standard Test Method for measuring friction and wear properties of lubricating grease using a high-frequency, linear-oscillation test machine
ASTM D6425
Equivalent to DIN 51834 part 2, Standard test method for measuring the friction and wear properties of EP lubricating oils using the SRV test machine
ASTM D 7217
Standard Test Method for Determining Extreme Pressure Properties of Solid Bonded Films Using a High Frequency Linear Oscillation SRV Test Machine
ASTM D7420
Standard Test Method for Determining Tribomechanical Properties of Grease Lubricated Plastic Socket Suspension Joints Using a High-Frequency, Linear-Oscillation Test Machine
ASTM D7594
Standard Test Method for Determining Fretting Wear Resistance of Lubricating Greases Under High Hertzian Contact Pressures Using a High-Frequency, Linear-Oscillation Test Machine
DIN 51834-1
Tribological test in the translatory oscillation apparatus Part 1: General working principles
DIN 51834-2
Tribological test in the translatory oscillation apparatus
Part 2: Standard test method for measuring the friction and wear properties of EP lubricating oils
DIN 51834-3
Tribological test in the translatory oscillation apparatus Determination of tribological behavior of materials in co-operation with lubricants
DIN 51834-4
Tribological test in the translatory oscillation apparatus Testing the tribological performance of gear and hydraulic fluids
DIN 62136-1
Textile machinery and accessories – Needle and sinker lubricating oils for weft knitting machines
ASTM D7421
Standard Test Method for Determining Extreme Pressure Properties of Lubricating Oils Using High-Frequency, Linear-Oscillation Test Machine
DIN 51834-5
Standardization project in the automotive sector
DIN 51834-6
Standard Test Method for Measuring Friction and Wear Properties of Lubricating Grease Using a High-Frequency, Linear-Oscillation Test Machine
DIN 51834-7
Standard Test Method for Determining Extreme Pressure Properties of Lubricating Greases Using a High-Frequency, Linear-Oscillation Test Machine
DIN 51834-8
Tribological test in translatory oscillation apparatus of bonded solid films DIN 51834-9 Evaluation of plastic greases with plastic specimens
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