Which Lubrication Method Is Best for Rolling Mill Bearings?
Release time:
2025-10-17
In steel rolling operations, rolling mill bearings are critical components, and their stability and service life depend heavily on the chosen lubrication method. Among various lubrication solutions, oil-air lubrication has proven to be one of the most effective options for rolling mill applications.
Oil-air lubrication forms a gas–liquid two-phase lubrication film with higher film thickness and a higher formation rate than conventional single-phase oil films. This significantly reduces friction and wear, improving bearing performance and extending service life.
During operation, compressed air carries away heat from the bearing housing, effectively lowering bearing temperature. At the same time, the air creates a slight positive pressure inside the bearing housing, helping to seal the bearing and prevent the ingress of water, harmful gases, scale, and other contaminants.
Precise oil delivery avoids excessive lubricant accumulation inside the bearing, reducing viscous resistance and minimizing lubricant consumption. Compared with traditional lubrication methods, oil-air lubrication also prevents contamination of emulsions, rolling mills, and the surrounding environment. With fewer moving parts, the system is highly reliable and requires minimal maintenance, further reducing operating and maintenance costs.
In a cold rolling mill application, oil-air lubrication applied to work roll bearings significantly improved lubrication performance and bearing life, while reducing lubricant consumption, water treatment costs, and unplanned downtime—delivering substantial economic benefits.
In summary, oil-air lubrication offers clear advantages for rolling mill bearings, making it a highly suitable and efficient lubrication solution for modern steel rolling operations.
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