Lubricants
What is it?
SRV is an abbreviation for ‘Schwingung, Reibung und Verschleiss' which when translated into English means ’oscillating, friction, and wear’. The SRV machine is used to evaluate friction and wear properties of liquid lubricants and greases in a variety of sliding contacts. Standardised test specimens and genuinely manufactured components can be used.
Why do we use it?
This machine is widely used by many Original Equipment Manufacturers (OEMs) and lubricant formulating companies to demonstrate performance across a broad range of applications, both automotive and industrial. DIN, ASTM and ISO standard tests are well-known in the industry and used as a reference by many lubricant formulators.
We use the SRV to investigate base oils, additives and formulated lubricants. The SRV enables us to identify friction modifiers and other performance additives that can help in the control of friction and minimise wear.
How does it work?
There are many different specimens and configurations that can be used in the SRV. Typically the SRV is used in oscillational mode or rotational mode. The SRV machine can be set up to run the following standard industry tests; DIN 51834, ASTM D5707-11, ASTM D7127-11, ASTM D7421-11, among others.
Friction data is provided by the SRV machine and the wear scars can then be measured using a 3D optical microscope.
3D Profilometer images of wear on the cylinder and disc:
Typical Test Conditions:
Parameter: Value
- Temperature: Ambient - 350ºC
- Stroke length: 0 - 5mm
- Frequency: 0.001 - 500Hz
- Inclination: 0 - 90º
- Rotation: 0 - 2000rpm
Cylinder - European Oil A @ 80ºC
Disc - European Oil A @ 80ºC
Cylinder - European Oil A + PerfadTM 3050 @ 80ºC
Disc- European Oil A + PerfadTM 3050 @ 80ºC