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Categories

GREASES

GREASES

General Purpose Grease (NLGI)

It is Commonly used bearing industries i.e It is called General Purpose Bearing.It is used in Bearing with d greater than 100 mm,Car,Truck and trailor wheel bearings.

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Extreme Pressure Grease

This type of Grease is used in Forming ans press section of Paper Mills,Work roll bearings in Steen Industry,Heavy Machinery & Vibrating Screens.

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High Load,Extreme Pressure Grease

It is used in Wheel bearings in cars,trailors and trucks,Washing machines.Bottling machines.

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Food Compatible Grease

This type of Grease is used in Food Processing Equipments,Wrapping Machines.

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Biodegradable Bearing Grease

This type of Grease is used in Agricultural & Forestry equipment,Construction and earthmoving equipment,Water Treatment & irrigation

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Low Temprature High Speed Graese

It is used in Textile & Machine tool spindels,Small electric motors,Robots,Printing Cylinders.

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Extreme Pressure Low Temprature Grease

It is used for Main Shaft and Wind Turbine,Centralised Lubrication System,Spherical Roller Thrust bearings application

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High Viscosity Bearing Grease

This type of Bearing grease is Iused for Jaw Crushers,Construction machinery 7 Vibrating machinery.

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Extremely High Viscosity Bearing Grease

It is used for Steel on steel plain bearings,Dryers section of Paper mills,Work roll bearings and continuous casting in steel industry,Sealed spherical roller bearings upto 150 Degree Celsius or 302 Degree Farhenite

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High Viscosity High Temprature

It is used for Steel on steel plain bearings,Dryers section of Paper mills,Work roll bearings and continuous casting in steel industry,Sealed spherical roller bearings upto 150 Degree Celsius or 302 Degree Farhenite

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High Performance Grease

It is used in Electric Motors & Fans at high Speed,High Speed ball bearings at medium and high tempratures.

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Extreme Temprature Grease

It is used in Bakery equipments,Textile dryers etc.
 

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Grease is a semisolid lubrication

It generally consists of a soap emulsified with mineral or vegetable oil.The characteristic feature of greases is that they possess a high initial viscosity, which upon the application of shear, drops to give the effect of an oil-lubricated bearing of approximately the same viscosity as the base oil used in the grease. This change in viscosity is called thixotropy. Grease is sometimes used to describe lubricating materials that are simply soft solids or high viscosity liquids, but these materials do not exhibit the shear-thinning (thixotropic) properties characteristic of the classical grease. For example, petroleum jellies such as Vaseline are not generally classified as greases.

Greases are applied to mechanisms that can only be lubricated infrequently and where a lubricating oil would not stay in position. They also act as sealants to prevent ingress of water and incompressible materials. Grease-lubricated bearings have greater frictional characteristics due to their high viscosity.

Properties of a lubrication

A true grease consists of an oil and/or other fluid lubricant that is mixed with a thickener, typically a soap, to form a solid or semisolid. Greases are a type of shear-thinning or pseudo-plastic fluid, which means that the viscosity of the fluid is reduced under shear. After sufficient force to shear the grease has been applied, the viscosity drops and approaches that of the base lubricant, such as the mineral oil. This sudden drop in shear force means that grease is considered a plastic fluid, and the reduction of shear force with time makes it thixotropic. It is often applied using a grease gun, which applies the grease to the part being lubricated under pressure, forcing the solid grease into the spaces in the part.

Application of a suitable Grease

Grease and oil are not interchangeable. Grease is used when it is not practical or convenient to use oil. The lubricant choice for a specific application is determined by matching the machinery design and operating conditions with desired lubricant characteristics. Grease is generally used for:

 

(1) Machinery that runs intermittently or is in storage for an extended period of time. Because grease remains in place, a lubricating film can instantly form.

 

(2) Machinery that is not easily accessible for frequent lubrication. High-quality greases can lubricate isolated or relatively inaccessible components for extended periods of time without frequent replenishing. These greases are also used in sealed- for-life applications such as some electrical motors and gearboxes.

 

(3) Machinery operating under extreme conditions such as high temperatures and pressures, shock loads, or slow speed under heavy load. Under these

circumstances, grease provides thicker film cushions that are required to protect and adequately lubricate, whereas oil films can be too thin and can rupture.

 

(4) Worn components. Grease maintains thicker films in clearances enlarged by wear and can extend the life of worn parts that were previously oil lubricated. Thicker grease films also provide noise insulation

Our Major Brands of Grease are:

SKF Grease