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INTRODUCTION:
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THE PRACTICE OF lubrication is an ancient one. Water was probably the first lubricant. When primeval man used water or ice to ease the sliding movement of heavy objects, the idea of lubrication was born. He later found that certain plants and animals contained oily secretions or had natural oils in their tissues. It was found that these oils had the advantage of a low evaporation rate, and the coefficient of friction was lower than that for water.
WHAT IS FRICTION?
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Friction is a measurable phenomenon and it is usually measured and expressed as a coefficient of friction. The coefficient of friction is the ratio of the force required to move an object to the normal force or weight of that object. Friction in machinery manifests itself in several ways:
• Power losses
• Lower efficiency
• Generation of heat
• Wear
• Equipment Failure/Seizure
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