LUBRICATING GREASES

High-Performance Greases

Industrial applications operate under intensive conditions such as extreme temperatures, pressures and speeds for extended durations. Greases are expected to provide long life while ensuring minimal friction and wear between the contact surfaces. The grease also has to withstand external factors such as water exposure, dust entry, thermal radiation, contact with corrosive and acidic medium etc. To achieve the desired performance is a feat possible only with high quality speciality lubricants. As one of the earliest firms with expertise in lubricants, BECHEM pioneered the concept of speciality greases and oils back in 1834.

BECHEM’s global range of high performance grease cover the entire spectrum of industrial applications. Designed for critical applications, BECHEM’s special lubricants are recommended in heavy industries such as Steel, Cement, Mining, Power, Paper processing, Railways etc. as well as in vital high-tech sectors such as Automotive, Textile, Food, pharma & beverage processing etc.

HIGH TEMPERATURE GREASES
BECHEM’s range for high temperature applications include greases developed from special Polyurea to advanced PTFE thickeners blended with synthetic as well as special mineral base oils. These high temperature resistant greases possess excellent temperature to consistency behavior.

WATER RESISTANT GREASES
BECHEM’s range of water resistant greases have been exclusively developed to withstand hostile operating conditions with exposure to water as well as aggressive and corrosive media.

HIGH LOAD GREASE
BECHEM’s range of heavy duty greases formulated with high base oil viscosity and equipped with anti wear and EP additives ensure consistent, high strength lubricant film under boundary and mixed condition.

MULTIPURPOSE EP GREASE
BECHEM’s upgraded range of multi purpose greases are designed to perform in diverse conditions, including moderate to high loads, wide operating temperatures and low to moderate speeds.

FOOD GRADE GREASE
BECHEM’s comprehensive range of high performance food grade lubricants comply to NSF guidelines and are recommended for a wide array of demanding applications. The ingredients comply to the requirements of Food and Drug Administration and is independently verified by NSF.

GREASE FOR ELECTRICAL CONTACTS
BECHEM’s range of electric greases are formulated with special low viscosity synthetic oil and organic polymer thickeners. These life lubricants protect contacting surfaces by ensuring high strength lubricating film that are compatible with engineering plastics and also possess excellent noise dampening properties.

PLASTIC PART LUBRICANTS
In automotive interiors, composite plastic materials are a combination of definite polymer matrix with special additives and reinforcements like glass fibers or plastic material in combination with PC with ABS etc.

HIGH SPEED GREASE
High speed bearings operate under the hydro dynamic lubrication regime. Lower base oil viscosity coupled with special thickener types offer the lowest internal friction that is necessary in such high speed applications.  D * N factor is the deciding criteria for the rated base oil viscosity.

NOISE DAMPENING GREASE
Damping vibrations and optimising friction values are critical for reducing undesired noises. BECHEM’s range of noise dampening lubricants for interior automotive components allow controlled movements consistently and significantly improve driving comfort.

WIRE ROPE GREASES
BECHEM’s range of wire rope greases posses excellent corrosion protection properties and provide long term lubrication for wire ropes that are subjected to high loads and stress. These adhesive greases resist water washout and have excellent creeping-in properties ensuring effective lubrication to every strand of the wire rope.

LOW TEMPERATURE GREASES
BECHEM’s range of greases for low temperatures exhibit excellent viscosity temperature behaviour ensuring optimal lubrication to contact partners in even extremely cold environments. These high performance greases minimise starting resistance at low temperatures and also provides longer service life.

SILICONE GREASES
As Silicone based oils are available in wide viscosity range, high viscosity Silicone oil based greases are recommended for noise dampening applications in Automotive industry. BECHEM’s Berusil range embodies the strengths of Silicone greases and have been recommended for a wide variety of industrial and automotive applications.

OPEN GEAR LUBRICANTS
BECHEM’S range of open gear lubricants are recommended for systems at Ball, Road and SAG mills, Rotary Kilns and Coolers, Hydraulic and Bucket wheel excavators and Draglines, Crushers and Stacker or Re-claimer systems, Cranes, Hoists, Winches, Drags and, Spreaders and Ladles and Dryers etc.

FREQUENTLY ASKED QUESTIONS

Greases are made by mixing a solid material, called a thickener, with a base oil and property enhancing additives; but it’s the oil that forms the lubrication film. For better understanding, grease thickener can be thought of as a sponge saturated with oil. Moving parts squeeze the oil out of the sponge like thickener for forming the lubrication film. Typically, the base oil constitutes the largest proportion of grease weight at about 80-90%, followed by thickener at 10 to 20% and additives under 10%.

Dropping point of a lubricating grease is an indicator of the heat resistance of the grease. and is the temperature at which the grease is no more a thickened lubricating medium. The dropping point indicates the upper temperature limit at which a grease retains its structure, not the maximum temperature at which a grease may be used.

Few greases have the ability to regain their original structure after cooling down from the dropping point.

The most important feature of a grease is its consistency. A grease that is too stiff may not get pumped into areas requiring lubrication. While a grease that is too fluid may leak out. Grease consistency depends on the type and amount of thickener used and the viscosity of its base oil. A grease consistency is its resistance to deformation by an applied force.

The measure of consistency is called penetration. Penetration depends on whether the consistency has been altered by working. Standard test procedures established by American Society for Testing and Materials International (ASTM) and accepted by industry are ASTM D 217 and D 1403, measure penetration of unworked and worked greases.

The NLGI has established consistency numbers ranging from 000 to 6, corresponding to specified ranges of penetration distance of the standard cone into the test grease. Table below lists the NLGI grease classifications along with a description of the consistency of each classification.

Viscosity: It is a measure of resistance to flow of a lubricating oil.

Viscosity index: It is defined as rate of change of viscosity with respect to temperature.

Significance:

  • It is the most important property which determines the performance of lubricating oils under the influence of temperature
  • A lubricating oil should have sufficient viscosity to retain a lubricating film on the surface
  • On machine part moving at slow speeds under high pressures, a high viscous oil should be used as it better resists being squeezed out from between the rubbing parts.  Light oils can be used for lower pressures and high speeds.
  • It is not possible to maintain a liquid oil film between two moving or sliding surfaces if the viscosity is too low and hence excessive wear will occur.

The pour point of an oil is the minimum temperature at which the oil turns into semi solid and almost losses its flow characteristic. At low temperatures, the viscosity of the oil will be very high, causing the oil to resist flow. This is important in equipment that operates in a cold environment or handles cold fluids.