What does the grease label mean What are the national standards for grease

The designation on the lubricant is based on the American Society of Automotive Engineers (SAE) oil viscosity classification. This is a kind of viscosity grade classification method, the lubricating oil is divided into high temperature type for summer, low temperature type for winter and all-weather type for winter and summer, and the specific classification of lubricating oil is 6 kinds of winter oil, 4 kinds of summer oil, and 16 kinds of winter and summer general oil.

The viscosity of lubricating oil is mostly marked by SAE and other grades, and SAE is the abbreviation of the American Society of Automotive Engineers in English.

Function. The role of grease is mainly lubrication, protection and sealing, most grease is used for lubrication, called anti-friction grease, anti-friction grease mainly plays the role of reducing mechanical friction and preventing mechanical wear, and also plays a protective role in preventing metal corrosion and sealing and dust-proofing.

There are some greases that are mainly used to prevent metal rust or corrosion, called protective greases, such as industrial petroleum jelly, etc., and a few greases are specially used for sealing, called sealing greases, such as thread grease. Greases are mostly semi-solid substances with unique fluidity.

The working principle of grease is that the thickener holds the oil where it needs to be lubricated, and when there is a load, the thickener releases the oil, thus acting as a lubricating agent.

At room temperature and at rest, it is like a solid, able to maintain its shape without flowing, and can adhere to metal without slipping. At high temperatures or when subjected to external forces that exceed a certain limit, it can flow like a liquid. When grease is sheared by moving parts in machinery, it creates flow and lubrication, reducing friction and wear between moving surfaces.

When the shear action stops, it can restore a certain consistency, this special fluidity of the grease, determines that it can be lubricated in the parts that are not suitable for lubricating oil, because it is a semi-solid substance, its sealing effect and protective effect are better than lubricating oil.

In general, the designation on the lubricant is based on the American Society of Automotive Engineers (SAE) oil viscosity classification. This is a viscosity classification that classifies lubricants into high-temperature types for summer, low-temperature types for winter, and all-weather types for winter and summer.

The specific classification of lubricating oil is 6 types of winter oil, 4 types of summer oil, and 16 kinds of winter and summer general oil.

Where: 1The grades of winter oil are as follows:

0w, 5w, 10w, 15w, 20w, 25w, the symbol w represents winter is the abbreviation of winter (winter), the smaller the number before w, the smaller the low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature;

2.The higher the number, the greater the viscosity, and the higher the applicable maximum temperature;

3.The general oil grades in winter and summer are: 5w w w w

1) High temperature type (such as SAE20 SAE50): The number indicates the viscosity at 100, and the larger the number, the higher the viscosity.

2) Low temperature type (such as Saeow Sae25W): W means only used in winter, the smaller the number, the lower the viscosity, and the better the low temperature fluidity.

3) All-weather type (such as SAE15W W 50): It means that the viscosity grades at low temperature meet the requirements of SAE15W, 10W, and 5W, and the viscosity grades at high temperature meet the requirements of SAE respectively, which belongs to the general type in winter and summer. There is no problem with 5w-30 engine oil in Sichuan.

The number of the grease is the number, which mainly refers to the different cone penetration of the grease, specifically the degree of softness and hardness is different, and the way of filling is not the same, No. 0 is thinner, No. 3 is harder, and the use of parts is not exactly the same.

Refers to the hardness and softness of the grease.

The NLGI consistency classification classifies greases from 000 to 6 in a total of 9 grades.

The commonly used greases in the equipment maintenance manual of Xugong Group are as follows for reference:

1—— Bearing grease, the common model is Kluber BE41, Shanghai Hutou Hotolube's fully synthetic high temperature motor bearing grease, fully synthetic high temperature and high-speed bearing grease, high temperature and heavy-duty bearing grease.

2—— Grease for ultra-high temperature equipment, such as kiln cars, glass industry, etc., the common model is Kluber BE41, Shanghai Hutou Hotolube's fully synthetic ultra-high temperature grease, 1200 degrees and fully synthetic long-lasting high-temperature grease, 300 degrees.

3—— Grease for low-temperature equipment, the use temperature is -60 70 degrees, the commonly used model is Shanghai Hutou Hotolube's fully synthetic low-temperature aviation grease or fully synthetic ultra-low temperature grease, Fusd KLS8200, etc.

4—— White grease, used for parts with lower speed, playing the role of lubrication sealing. Common models: Kluber GLK 112, Hotolube fully synthetic fluoroesters and fluorosilicone greases.

5- Transparent silicone grease. Common models: fully synthetic lubricating grease from Tiger Head Hotolube, GLK 118 from Kluber

New classification GB a 90.

This classification standard.

It is suitable for lubricating all kinds of grease such as various equipment, mechanical parts, vehicles, etc., and is not suitable for special purpose grease. In other words, it is only suitable for lubricating greases, and not for special greases that play the role of sealing and protection. This classification is based on operating conditions.

In this standard classification system, a grease corresponds to a code that corresponds to the most stringent operating conditions (temperature, water contamination) in the application of the grease.

and load conditions, etc.). In fact, the 190 is just a code for providing grease grouped by operating conditions, and this code is made up of 5 capital letters.

Guidance for use. The types of products that grease can be replaced: lithium grease, calcium grease, aluminum grease, complex lithium grease, complex aluminum grease, high temperature grease, low temperature grease Wheel axle.

Bearing grease, multi-purpose grease, electric motorcycle.

Grease, insulating grease, bearing grease, O-ring grease.

It is recommended to use Super Lube High Temperature Extreme Pressure Grease instead of Super Lube Multifunctional Synthetic Grease under the following conditions: the operating temperature is higher, when the operating temperature exceeds 260 degrees, the base oil.

Most of them will evaporate and will not form sufficient lubricant film strength, so some solid additives such as lead, aluminum, copper and molybdenum will be used.

Main application environment: high-temperature furnace, automatic welding equipment and pure oxygen environment. Although Super Lube is difficult to ignite, the pure oxygen environment will accelerate its oxidation, and if Super Lube Multi-Purpose Synthetic Grease is used in a pure oxygen environment, it will spontaneously ignite.

Such cases are: oxidation welding equipment, medical equipment, diving navigation respiratory system.

In this case, please use high-temperature extreme pressure grease.

2 Reference Standards.

GB T 2 69 Grease and stone grease taper assay.

GB T 4 929 Grease dropping point assay.

GB T 5 018 Lubricating Grease Corrosion Resistance Test Method.

GBT 7 325 Determination of evaporative loss of greases and oils.

GB T 7 326 Lubricating Grease Copper Sheet Corrosion Test Method.

GB T 7 Classification of lubricants and related products (Class L) Part 8: Group X (greases).

SH T 0 048 Similar viscosity determination of greases.

SH T 0 109 Determination of Grease Resistance to Water Spray.

SH 0 16 4 Rules for the acceptance of packaging, storage, transportation and delivery of petroleum products.

SH T 0 229 Sampling of solid and semi-solid petroleum products.

SH T 0 324 Grease Stencil Oil Separator Method (Static Method) SH T 0 325 Lubricating Grease Oxidation Stability Determination Method.

SH T 0 336 Determination of impurity content in grease (microscopic method).

The number of grease is generally 00, 00 refers to the accompanying fluid, the thinnest, almost the same as water, the higher the mark, the more viscous.

The greater the viscosity of the grease, the thicker the oil film between the friction surfaces of each moving part. Although the thick oil film is conducive to preventing the wear of the friction surface, the friction resistance is also large, and the power loss increases. Foreign data show that the viscosity of the grease is reduced by 1 cents, which saves about fuel.

In addition, experiments have also proved that when the viscosity of the grease exceeds the requirements, the wear of the parts will also increase, because about 2 3 The amount of wear of the parts is generated at the beginning of starting.

The use of 3 lithium grease with high viscosity, starting at low temperature, due to a period of shutdown, the grease on the friction surface has been lost, and the viscosity is large, the flow is slow, and the grease film can not be replenished to the friction surface in time, which will make the parts in a dry friction and semi-dry friction state for a long time, resulting in increased wear of the parts.

Grease can be used for the lubrication and protection of various mechanical equipment and vehicles such as automobiles, among which grease No. 1, No. 2, and No. 3 are different in their properties and uses.

Grease No. 1 is usually pointer or paste semi-fluid, mainly used for the lubrication of light-load parts with large friction, such as printer transmission parts, small motor bearings, textile machinery bearings, etc. Its main characteristics are that it has a soft texture and low viscosity, and does not harden or deteriorate after standing for a long time. In addition, grease No. 1 can also play a role in rust and corrosion prevention.

Grease No. 2 is a common type of grease, which is mainly used for lubricating light and heavy load parts of various machine grip equipment and automobiles, such as car brake systems, wheel bearings, air compressors, various machines in factories, etc. Compared to Grease No. 1, Grease No. 2 has a slightly higher viscosity and is able to better maintain contact with the surface of the lubricated parts and reduce wear. In addition, grease No. 2 also has good mechanical stability and high temperature resistance, and is often used for lubrication under high-speed rotation and high temperature conditions.

Grease No. 3 is a high-viscosity grease that is mainly used for the lubrication of heavy-duty and large machines, such as construction vehicles, steel mills and mining machinery. Grease No. 3 has a very high viscosity and guarantees lubrication under extreme load and vibration conditions. In addition, grease No. 3 also has good water resistance and anti-corrosion section megalowatt.

In conclusion, the difference between grease and grease is the difference in viscosity and use. Depending on the specific needs of the machine, it is necessary to select the right grease for lubrication and protection. <>