There are many kinds of bearings and their lubricants used in the engineering world today. There are the journal, sliding, thrust, composite, ‘hydrodynamic’, just to name a few. In this post, we are going to go over the rolling and sliding bearings, and lubricants to be utilized in these bearings.
Rolling bearings, often known as rolling component bearings interpose rolling components (like balls, rollers, cones) between mating surfaces. Often times, there are two mating surfaces, with the rolling bearings in the middle (between). This reasons the ‘Hertzian’ contact.
Therefore, hard materials is required. These hard materials are also known as as anti friction bearings due to qualities like lower rolling friction, compared to its sliding bearings counterpart. In sliding factor bearings, surfaces are in direct contact or separated by way of a lubricant film. Where can I park my RV to live There is no ‘Hertzian’ contact whatsoever. Alternatively, frictional forces and wear and influenced by relative velocity and make contact with forces (normal force, applied load, bearing load capability).
‘Hertzian’ contact stress identifies the localized stresses that develop as two curved surfaces come in contact and deform slightly beneath the imposed loads. This quantity of deformation would depend on the modulus of elasticity of the stuff in contact.
There are the mineral oils, synthetic natural oils and greases for the lubricant course. All bearings need lubricants so as to function. Mineral oil is derived from petroleum and man made is via chemical processes (natural material). These oil also serves to dissipate heat from the bearings. Greases consist of oil and fibers (or various other gelling materials). They are designed to retain oil, reduce evaporation and provide long term lubrication. However, they are not able to carrying off heat.