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The main function of lubricants is to keep moving metal surfaces separate in order to reduce friction. On tissue machines, lubricants are used to reduce friction, wear and heat in bearings, gears and drive couplings. Common lubrication points include roll bearings, dryer gears, drive gearboxes and couplings, pump bearings, fan and blower bearings, and agitator bearings. Lubrication is accomplished with the use of various types of oils and greases supplied to the process by different types of lubrication systems. Lubrication methods, types, and procedures have a major on the life of machine components, uptime, overall reliability, and profitability.