Work roll bearings in roughing and intermediate stands in Wire Rod Mills typically operate in high load, high water ingress and temperatures zones. A recent study of bearings in wire rod mills indicated ‘selection of improper lubricant’ as one of the primary reasons for failures. Operating conditions demand for greases with higher base oil viscosity and stable viscosity index to ensure a thick, high strength film between the contact surfaces. Additionally, the grease should be able to withstand water, scale and dust contamination that could impact lubricating performance.
BECHEM’s range of greases for work roll bearings are formulated with high quality base oils with higher viscosities to withstand high loads even at elevated temperatures. These water resistant greases provide effective lubrication to friction partners of the bearing during boundary and mixed lubrication regimes. Selection of the right grease is critical in avoiding premature bearing failures and avoiding downtime
Wire Tod Mill Greases
High load greases with reliable antiwear, corrosion protection and water resistance properties. Heavy duty EP grease has excellent pumpability and is suitable for central lubrication systems.
Applications: High Lub LT 2 EP 400 is recommended for lubrication of plain and roller bearings exposed to medium to heavy loads, roller and plain bearings of conveyor rollers, pellet presses, electric motor, fans, axle bearings, life lubricated bearings in motor vehicles, friction zones in granite cutting machines, bearings of gang saw machines and actuators systems in solar power plants etc. Also used as a multipurpose grease in automotive assembly plants.
|Product||Thickener||Base Oil||Temp Range °C||Send Enquiries|
|BECHEM High Lub LT2 EP 400||Lithium||Mineral Oil||-20 to + 140|
Heavy duty, long life grease with excellent water resistance and corrosion protection properties. High-Lub FA 67 400 reduces friction and wear on mechanisms subjected to high loads and shock loads. The product provides excellent stability even after prolonged working at high loads in presence of water.
Applications: Recommended to lubricate roller bearings exposed to high loads and water ingress. Suitable for work roll bearings in hot and cold rolling mills, wet end bearings of press section and forming table in paper processing industries. Also suitable to lubricate heavy mobile equipment’s in the construction and mining industry, slide ways of automatic tool changer in CNC machines, bearings on sheet forming machines as well as bearings in tin rolling machines.
|Product||Thickener||Base Oil||Temp Range °C||Send Enquiries|
|BECHEM High Lub FA 67 400||Lithium Calcium||Mineral Oil||-30 to +130|
Applications and Properties
The unique pictograms help identify primary characteristics of the lubricant as well as key applications and industries it has been established at a glance. However the final recommendation would still have to be by the BECHEM specialist after having studied application and its operating environment. As the saying goes, ‘every problem has a unique solution, if only, one is looking for it’. This is the core philosophy to our approach towards ‘Application Engineering’ and staying true to ‘speciality’
Resistant to water
Frequently Asked Questions
Short bytes for queries on lubricants that always bothered you
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.
- 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.
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