Is Grease So Important？

Bearing grease is a lubricating oil prepared by low viscosity synthetic lubricating oil with anti-oxidation, anti-rust and other additives.  Used for mechanical friction parts, 

lubrication and sealing.  It is also used on metal surfaces to fill gaps and prevent rust.  It is mainly made from mineral oils (or synthetic lubricants) and thickeners.  

Designed for lifelong lubrication and silencing of oil bearing in powder metallurgy. Temperature range :-20~+250℃.

1. An overview of the   High temperature heavy duty anti-wear and long life bearing grease is made by thickening of compound soap into base oil and adding high-efficiency 

additives such as anti-wear, extreme pressure, anti-oxidation, anti-corrosion and structural improves.  High temperature resistance, long life, excellent wear resistance.  

2. Performance characteristics   Excellent anti-wear extreme pressure performance to ensure the best load capacity;   Extremely effective in reducing friction, the heat 

generated to control at a minimum;   Excellent oxidation stability at high temperature to ensure long-term normal operation of lubrication parts at high temperature;   Provides 

comprehensive protection for bearings, greatly prolongs bearing life;   Excellent lubrication of metal surfaces, especially in boundary lubrication.

3. Basic composition  

Grease is mainly composed of three parts: thickener, base oil and additive.  The content of thickener in general grease is about 10%-20%, the content of base oil is about 75%-90%, and the content of additives and fillers is less than 5%.

(1) Base oil  

Base oil is the dispersion medium in the dispersion system of grease, which has great influence on the performance of grease.  General grease mostly uses medium viscosity 

and high viscosity petroleum lubricating oil as the base oil, but also some in order to meet the needs of mechanical lubrication and sealing under harsh conditions, using 

synthetic lubricating oil as the base oil, such as ester oil, silicone oil, poly α -olefin oil and so on.  

(2) thickener  

Thickener is an important component of grease. The thickener is dispersed in the base oil and forms the structural framework of grease, so that the base oil is adsorbed and 

fixed in the structural framework.  The water resistance and heat resistance of grease are mainly determined by thickener.  There are two main classes of thickeners used in the

preparation of greases.  Soap-based thickeners (i.e., fatty acid metal salts) and non-soap-based thickeners (hydrocarbons, inorganic and organic).    

(3) additives and fillers   One kind of additive is the grease waiting for, called glue solvent, it makes the oil soap bond more stable?   Such as glycerin and water.   Once water is 

lost in calcium base grease, its structure is completely destroyed and can not form grease. For example, glycerin can adjust the consistency of grease in sodium base grease.   

Another kind of additives and lubricating oil, such as antioxidant, anti-wear and anti-rust agent, but the amount is generally more than lubricating oil.   Such as phosphate ester, 

ZDDP, Elco extreme pressure antiwear agent, compound agent, drop point raising agent, etc.

4.Role

The functions of grease are mainly for lubrication, protection and sealing.  Most greases are used for lubrication and are called antifriction greases.  Antifriction grease mainly plays a role in reducing mechanical friction and preventing mechanical wear.  At the same time, it also has the protective effect of preventing metal corrosion, and the sealing 

and dustproof effect.

Some greases are mainly used to prevent metal from rusting or corrosion, and are called protective greases.  For example, there are a few industrial petroleum jelly grease for 

sealing, called sealing grease, such as thread grease. Grease is mostly a semisolid substance with unique fluidity.

The working principle of grease is that the thickener will keep the oil in the position to be lubricated. When there is a load, the thickener will release the oil, so as to play the role 

of lubrication.  It behaves like a solid at room temperature and at rest, retains its shape without flowing, and sticks to metal without slipping.  At high temperature or by external 

forces beyond a certain limit, it can flow like a liquid.  Grease in machinery by the shear action of moving parts, it can produce flow and lubrication, reduce friction and wear 

between moving surfaces.