The comber gear box operates under high specific loads with various combinations like spur, helical, double helical gears etc. Temperature rise, gear wear out due to inadequate lubrication are high possibilities during regular operation. The lubricant plays a critical role in ensuring breakdown free operation of the comber gear box.
The comber gear oil should possess superior anti wear additives to protect the gear teeth that operate under high loads. In order to maintain the necessary lubrication film between contact partners at higher temperatures, the lubricant should have good viscosity index. Metallurgy of the gear box set up is diverse with presence of phosphor bronze, steel and white metal bushes, the lubricant should be compatible with these metal pairings. The lubricant should also be able to inert to possible entry of cotton fluff and inhibit foam formation.
BECHEM recommends the Berusynth GP range of synthetic oils for the application of comber gear box that provides high strength film for contact surfaces and does not rupture under high loads.
Gear Oil For High Speed Combers
Berusynth GP 150
Berusynth GP 150 is high performance synthetic gear and circulation oil with EP additives for gearboxes running under high mechanical or thermal loads. Possessing excellent oxidation stability and shear resistance, extended oil changing intervals can be achieved with Berusynth GP 150.
This synthetic lubricant with high viscosity index is recommended for spur, conical and worm gears used in textile mills, winches, cranes and conveyors. With wide service temperature range, Berusynth GP 150 can be used in gear boxes and circulation systems that operate continuously in temperatures above 100˚C as well as mechanisms that operate in freezing conditions. Also, Berusynth GP 150 does not react with mineral oil resistant seal material or machine paints.
Applications: The product is recommended for application in textile industry in Comber headstock gearbox as well as Dobby gearbox of loom. ‘Berusynth GP 150’ is approved by ‘M/s. LMW’ for high speed motors.
|Product||Base oil viscosity [mm²/s] at 40 °C||Base oil||Temp Range||Send Your Queries|
|Berusynth GP 150||143||Polyalphaolefin (PAO)||-35 °C to +150 °C|
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’
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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