When the selection of products of a kind of grease when needed, we should first make clear the grease the role: antifriction, silencing, protection, sealing etc.. Antifriction grease, should consider the range of high and low temperature, load and speed; the silencing of grease, should consider mobile crane bearing the adhesion, temperature range, load and speed and so on; protective grease, consideration should be given to the metal, non protective compatibility with metal; sealing grease, should consider the compatibility and seal material. Also should be selected according to the structure and environmental products grease lubricating parts of different working conditions, comprehensive up the following main indicators:
Working temperature: 1 by low temperature limit the lowest temperature of lubricating parts should be higher than the grease, otherwise it will reali slim bearings increase the resistance of the highest temperature should be below the temperature limit; grease, otherwise it will lose because of grease lubrication capacity loss; the highest applicable temperature grease should be below the drop point 20 ~ 30 ℃.
2 speed: lubricating parts of the operation speed is higher, the shear stress of the lubricating grease is bigger, and the high speed dynamic mechanical temperature to rise quickly, easy to make the lubricant thinning and erosion, so we should select the consistency grease bigger. 3: according to the load bearing load is the key to ensure Series super thin section bearings the selection of grease lubrication, lubrication points should be used for heavy load of base oil with high viscosity, thickened grease agent content is high; if can bear heavy load and shock load, should choose high extreme pressure and anti grinding grease resistance, such as the grease containing molybdenum disulfide. 
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