Tribology is defined as the science and technology of surfaces in contact and in relative motion; it is the science that studies: friction, usury, lubrication.
4- BALL & SHEAR STABILITY:
According to the ASTM D2266 & D4172 methods (with Wear Loading Kit 19940-0), ASTM D2596, ASTM D2783, CEC L-45-A-99, EN ISO 20623, IP 239, IP 300 Procedures A and B (obs), ISO CD 11008
SILK – SHELL 4 BALL LUBRICANT TESTER determines the frictional properties of oils and greases at extreme pressure. Used in tribological research laboratories and quality control laboratories for routine analysis of finished products for lubrication.
Shell 4-ball lubricant tester, cod. ST19900-2
Shell 4-ball lubricant tester AUTOLOAD, with automatic loading system, cod. ST19800-6 (right photo)
SHEAR STABILITY HEAD
According to the CEC methods L-45-A-99, ISO 26422.
It is mounted on the SETA – SHELL 4 BALL LUBRICANT TESTER instrument to determine the loss of the viscosity of the cut.
PIN or BALL ON DISK TRIBOMETER
The tribometer is an instrument that allows you to measure the coefficient of friction (static or dynamic) and the wear of materials that flow on each other, even in the presence of a fluid medium (lubricating oil, grease, water, etc.) , modifying the applied load, the mutual sliding speed and the temperature during the test. According to ASTM G99 methods.