Industrial Lubricants

A lubricant is a liquid substance introduced amidst the machine joints and connecting parts to reduce the friction between two surfaces. The temperature of industrial lubricants ranges from 30 degree to 200 degree and above.

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Detailed Description for Industrial Lubricants


Lubricants are known for their versatile characteristics such as high boiling point and low freezing point, superior viscosity index, thermal and hydraulic stability, demulsibility, and corrosion and oxidation resistant.


Formulation of a lubricant

Generally, the lubricants consist of 90% base oil, which is of petroleum fractions called mineral oil and 10% of additives. Besides, vegetable oil and synthetic liquid such as esters, hydrogenated polyolefin, fluorocarbons, silicones are similar oils are used as base oil. Other additives used in lubricants reduce friction and oxidation, wear and tear, augments viscosity and viscosity index. Different types of additives are added in base oil to augment lubricant characteristics. The main families of additives are;



Corrosion inhibiters


Metal deactivators

Friction modifiers

Anti-foaming agents

Demulsifiers and Emulsifiers

Extreme pressure

Complexing agents

Normally, not all families mentioned above are used as additives. Some are economically and technically not feasible. Some lubricant oils may content of EP whilst some lubricants such as grease contains large amount of solid particles such as graphite and molybdenum sulfide.


Types of lubricants

Normally, lubricants are composed of a majority of base oil and the additives are added based upon the characteristics industries wish to impart. Although lubricants are based on one type of base oil, additives are added to impart desired characteristics.


Base oil groups

The terms mineral oil is encompassed to represent the lubricating oil derived from the crude oil. The lubricant base oil is divided into five groups, which are;

Group I: Saturates less than 90% and/or Sulfur of >0.03% with a viscosity index of 80 to 120. The Group I lubricating oil is manufactured by solvent extraction and hydro-finishing processes.

Group II: Saturates more than 90% and/or Sulfur of <0.03% with a viscosity index of 80 to 120. The Group II lubricating oil is manufactured by hydro cracking and catalytic de-waxing processes.

Group III: Saturates more than 90% and/or Sulfur of <0.03% with a viscosity index of 120. The Group II lubricating oil is manufactured by isohydromerization processes.

Group IV: Polyalphaolefins (PAO)

Group V: Naphthenic, ester and PAG.



Smoothens the moving part

Transfers heat and reduces the friction

Transmits power

Contaminants and debris resistant

Prevents wear and tear

Corrosion and rust resistant


Prevents the risk of smoke 










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Seema S

General purpose lubricant or synthetic lubricant? Posted on 8/18/2016

While choosing a lubricant, it is the most important factor to be considered. Some lubricants are used once in a lift time whilst some lubricants are changes at regular intervals of time. Hence, it is essential to know which type of lubricant is suitable to meet your needs.

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