SRV Tester

Designed for Lubricant and Materials Study

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SRV Tester

SRV Tester Features

Next generation Rtec SRV test system measures the coefficient of friction and wear between a lubricant, oil, grease etc and two specimens in a loaded contact in linear oscillatory motion from 5 micron strokes. RTEC offers state of the art SRV machine is based on one of our two platforms MFT-5000 or FFT-5000 (mentioned in sections below). The sliding reciprocating friction module has a wide load, speed and temperature range. Using various combinations of test conditions, it can test friction and wear data using several ASTM, DIN, ISO standards on same tester.

Main Features
● 5 micron to 4mm Stroke, Upto 300Hz
● Piezo Sensors
● Electromagnetic Coils
● -40 to 250 (optional 500C) Temperature

SRV Test - Choice of Two Plaform

Choice Depends On Multi Function vs Single Function

Rtec Tribometer and Fretting Tester

Multi Function Tribometer MFT-5000
SRV test upto 600N Friction Force (upto 2500N down force) on Multi Function tribometer that allows to do several other friction, tribology, wear tests on same platform. click to learn more

Single Function Fretting Tester FFT-5000
SRV and fretting test upto 2000N Friction Force (5000N Down force) on Fretting FFT-5000 platform Click to learn more

Detailed Module Information

All Rtec SRV modules are constructed on flexure based designs. The motion is imparted using electromagnetic actuators with real time stroke and wave form correction controllers.

Force sensors- The tester uses high resolution, fast frequency response piezo sensors to measure real time inline friction forces. 

Reliabilty on long runs - The unique flexure suspension guides the magnet assembly without contact or lubrication. The magnet, coil and stators are designed to eliminate performance degradation over time and deliver near maintenance-free operation.

Position Sensor and Control - The most accurate and precise displacement sensor control on the market • Up to 1nm resolution and micron level of accuracy • Extremely low noise


Platform Rigidity - Vibration dampening frame, symmetrical design, rigid samples holders etc. allows for high system stiffness. High rigidity allows to create fretting loops with ease.

Environmental Chambers - Wide temperature from -40 to 1200C range allows the fretting tester to simulate several real life scenarios easily. The temperature and test duration is the test system is controlled using computer. 

Inline Sensors - Sensors such as Acoustic emission to detect onset of cracks, ECR to measure surface resistance change allows to gain more insight on the test interface

Data and Analysis

Ball Wear Mark and Volume Wear measuring after SRV test using Rtec tribometer

Ball Wear Mark and Volume Wear

Rtec 3D Profiler created 3D mark of ball scar surface after the test. The profiler is able to measure volume wear of ball.

Real time Friction and Down Force during SRV test on Rtec tribometer

Real time Friction and Down Force 

The graph showing real time friction data and down force control during the srv test

Real time stroke control and Down Force during SRV test on Rtec tribometer

Real time stroke control graph

The graph showing real time down force and stroke control during the test

Summary data after SRV test on few samples on rtec tribometer

Conclusion

SRV test oscillation test setup based on MFT-5000 or FFT-5000 platform is an excellent option to run oscillating lubricant tests in various modes. The precise stroke control, close loop down force control and controlled environmental conditions allows to replicate lab results to real life scenario. All the above makes this tester a very powerful tool in the hand of the researcher or QC engineer. Please contact us at info@rtec-instruments.com or call us at +1 (408)708-9226 for more information.

Keywords, ASTM 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

Contact us for a live Demo or additional information