Oil viscosity decreases with increasing temperature, with a lubricant at different temperatures, the viscosity is different. This to be known as the "viscosity - temperature characteristics. Viscosity - temperature characteristics of the grease lubricants complex, because of this structural system viscosity - temperature characteristics also change with the change of the shear.

The viscosity of the grease at a certain temperature is variable changes as the shear rate changes. This viscosity is called a similar viscosity, the international unit of measurement for Pa (ska). Seconds (Pa ? s).
 
Similar to the viscosity of the grease does not obey Newton's law of fluid flow, and decreases with increasing shear rate. Due to relative motion between the grease layers, the skeleton of the structure is destroyed, so the higher the shear rate, the structural skeleton destruction heavier, similar to the grease viscosity is lower the greater. When the shear rate continues to increase, the grease similar to the viscosity close to the base oil viscosity after not change, while maintaining the nature of Newtonian fluid. Grease similar to the variation of viscosity and shear rate is called the Viscosity - velocity characteristics. Viscosity with shear rate changes markedly effective bitter, the greater the energy loss. Can generally be based on low temperature grease similar viscosity values ??allow to determine the low temperature limit of the transfer grease.



Other News:
The viscosity of the grease on the use of performance impact
The foreign media: ＂Dongguan＂ frigate Nansha success off the light
Storage of grease should be noted that the basic
London Race - Liu Xiang, the ribs are not out of the race
Secret Hainan to go to the Spratly Islands fishing fleet ＂lead ship＂
Steel supply and demand exacerbated by the market rebounded at the end of August
The situation in the South China Sea: the United States sought power by riding
Note the use and installation of NSK Bearings