Chain lubrication: Why does a chain need it?
Sometimes overlooked, lubrication should be considered as a major component in the chain’s construction. As well as being an important factor in prolonging chain life by slowing the wear between the pins and bushings in the chain joints, it also serves to flush out debris from wear and other loose foreign materials and to smooth sprocket engagement. Lubrication by its very nature is an excellent inhibitor to rust and corrosion, it also cushions the forces of impact and can be used to diffuse heat.
What makes a good lubricant?
Viscosity is the keyword. It must be able to penetrate internal surfaces and have a high enough viscosity, or using necessary additives, be able to maintain an effective film at the required temperature and operating conditions. A good grade of nondetergent based petroleum oil usually is commonplace. Additives like antifoaming, antioxidizing, and extreme pressure agents are often used.
A chain manufacturer often uses grease or petroleum jelly as a protective initial lubricant. However, greases should not be applied to chains in service because their viscosity prevents them from penetrating the internal bearing surfaces of the chain.
Although we are regularly asked what the best lubricants are we always recommend talking to a tribologist (someone qualified in the study of how surfaces behave in relative motion) at a reputable lubricant company.
Numerous research articles on chain lubricants have existed for rotary power chains (think motorcycle, bicycles, and roller chain drives) however these types of chains and their intended use are very different from leaf chains in several ways.
Generally, these chains comprise four parts – links, roller, bush, and pins. The lubrication required needs to penetrate between the bush and inside of the roller and whilst that gap is small the clearance is bigger than that found between leaf chain pins and plates. Plus, they often operate at higher speeds and temperatures, with lubricant applied via an oil bath on the unloaded side of the drive. The lubricant required can therefore be quite different.
Chain lubrication is crucial for the proper functioning and maintenance of chains, particularly in machinery, bicycles, motorcycles, and other mechanical systems that utilize chains. There are several reasons why a chain needs lubrication:
Reduced friction: When a chain moves, its links rub against each other and the sprockets or gears it interacts with. Lubrication helps to reduce friction between these moving parts, which minimizes wear and tear on the chain, sprockets, and gears.
Preventing wear: Without lubrication, the metal surfaces of the chain will experience increased wear due to the constant rubbing and grinding against each other. Over time, this can cause the chain to stretch, become loose, and eventually lead to premature failure.
Corrosion protection: Chains are often exposed to various environmental factors like moisture, dirt, and dust. These elements can cause corrosion on the chain, weakening it and reducing its lifespan. Proper lubrication forms a protective barrier on the chain's surfaces, preventing moisture and contaminants from causing damage.
Noise reduction: A well-lubricated chain operates more quietly than a dry or poorly lubricated chain. Lubrication helps to dampen the noise produced by metal-on-metal contact, leading to a smoother and quieter operation.
Improved efficiency: Friction and wear can decrease the efficiency of chain-driven systems. By keeping the chain properly lubricated, you reduce energy losses caused by resistance, leading to improved overall system efficiency.
Heat dissipation: Chains can generate heat during operation due to friction. Lubrication helps dissipate this heat, preventing excessive heat buildup, which could lead to accelerated wear and potential chain failure.
For proper chain lubrication, it is essential to use a lubricant specifically designed for chains, as standard lubricants might not provide adequate protection and can attract more dirt and debris. Regular maintenance and lubrication ensure that the chain functions smoothly and lasts longer, saving you from frequent replacements and costly repairs.
GIDI CHAIN LIMITED supply lots of roller chain, conveyor chain, Leaf Chain, welded chain, forged chain, Palm Oil Mill Chain, Hoisting Chain,Mine and Metallurgy Chain, etc. totaling over 3000 varieties. and 90% of chains are exported to worldwide, Which mainly export to Southeast Asia, European, North America, South America. Chains are welcomed by customers with the excellent quality. Our company owns more than 100 sets of advanced and professional manufacturing equipment, Perfect and rigorous QC system is implemented in every process from material purchasing to finished products packaging. Also, we have passed the ISO9001: 2015 Quality Management System Certification.
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