OBJECT OF LUBRICATION
The lubrication method and the lubricant have a direct effect on the bearing life; the most suitable lubrication must therefore be selected for each application. Effects of lubrication are described as follows:
(1)DECREASE OF FRICTION AND ABRASION
It decreases rolling friction between the raceway and the rolling elements, sliding friction between rolling element and cage and sliding friction of guide surface between the cage and the bearing ring.
(2) REDUCTION OF HEAT GENERATION
It dissipates heat generated inside the bearing as well as heat conducted from the outside thus preventing overheating of the bearing and deterioration of the lubricant.
(3) PROTECTION FROM CORROSION AND CONTAMINANTS
It prevents corrosion of rolling elements, bearing rings and cages and also prevents the ingress of contaminants and moisture into the bearing.
REQUIRED CHARACTERISTICS OF THE LUBRICANT
(1)LOW FRICTION AND ABRASION
(2) HIGH STABILITY AGAINST HEAT, GOOD THERMAL CONDUCTIVITY
(3) STRONG OIL FILM
(5) PROVIDE A GOOD BARRIER AGAINST DUST AND MOISTURE
(6) MAINTAIN A STABLE VISCOSITY
There are two types of lubricant: oil or grease. It is important to select the correct lubricant and lubrication method for each application and its conditions.
LUBRICATING OIL AND GREASE
GREASE FILLING VOLUME
|NOTE:||LIGHT LOAD ( 0.06Cr)
STANDARD LOAD ( 0.12Cr)
|CRITERIA FOR LUBRICATING OIL SELECTION