Viscosity index it is a dimensionless quantity measurement of fluid change in viscosity which is relative to temperature change .In this research an evaluation is carried out on design of ball bearing the effect of thermal expansion, variation in convective heat transfer coefficient, linear elasticity partitions, geometry, internal clearance defects, rate of speed ,rotary shaft circular motion, lack of timing of grease volume, refilling and mounting measurement systematic error due to climatic variation during design consideration with temperature fluctuation within material and it outer boundary system that actuate the sliding force with shear thickening process in grease and it solubility rate alongside contacting surfaces within the strain determination for the hub connecting the shaft to aid transmission of energy to the gearing system and it acceleration. As the heating temperature increases the volume of the thermal linear expansion of ball bearing groove with cage affecting the shield increases uniformly while the grease lubricity of chemical binding concentration decrease this is a critical problem needed to be solved using various field of engineering principles such as chemistry, physic, metallurgy and engineering. This research also focuses on shield or seals improper molding design and configuration within the pattern entry unit of sand contaminant into the hub which slows the speed rate by causing surface defects as a result of excitation of the atom within the ball bearing and scattering of the balls

Keywords : Viscosity Index, Conduction, Convective Heat Coefficient, Water , Grease Contaminant, Ball Bearing