Since the early 1970s, the usage of Environmentally Acceptable Lubricants (EALs) in the industry started to grow and different sectors started investing in the development of EALs, e.g. development of EAL hydraulic fluids for forestry […]
What is plastic deformation? Plastic deformation, in general, can be defined as a permanent deformation, a non-reversible change in the geometry of a body under applied stresses (forces). For example, if hit sufficiently hard by […]
What is Boundary Lubrication? Boundary lubrication describes situations where the applied load is primarily supported by contacting solid asperities, rather than a liquid lubricant. The boundary lubrication regime acts when the lambda ratio (the ratio […]
Variation of Viscosity with Pressure Primary purpose of any industrial lubricant is to maintain a satisfactory lubricating film in between contacting surfaces; and importance of viscosity to achieve this is univocally known in industrial maintenance […]
Temperature – Viscosity Relation Viscosity is a measure of a lubricating oil’s resistant to flow. It is well-known from Hydrodynamic Lubrication Theory that viscosity plays a central role in the lubrication regime encountered in the […]
What is surface fatigue? Surface fatigue is the failure on the top layer of a body due to repeated loading. It can be differentiated from other types as it only occurs on the surface. It […]
The Engine Bearing (Main Bearing) The internal combustion engine (piston engine) currently is still the most common engine used in automotive indutstry, even though the electric vehicles using electric vehicles are getting rapidly popular. Combustion […]
1. Introduction: Friction is the force that prevents layers of fluid, surfaces of solids and material components sliding against one another. The force which resists the relative lateral movement between two solid contacting surfaces is […]
What is galling? Severe types of adhesive wear are often called galling, scuffing, welding or smearing, although these terms are sometimes used loosely to describe other types of wear. In metal-to-metal wear tests, high stresses […]
What is a Four Ball Tester? Oil lubrication and lubrication technologies are essential in reducing friction and wear losses in machines. The key in efficiency of the frictional system is a lubricant (grease, oil, solid […]
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