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Question
Write a note on Greases.
Solution
lubricating grease is a semisolid consisting of thickening agent such as metallic soaps, dispersed throughout liquid lubricating oil. The liquid lubricant may be petroleum oil or even synthetic oil and it may contain any of the additives for specific requirement.
GREASES ARE USED UNDER FOLLOWING CONDITION:-
• In situations where the oil cannot remain in place due to high load, low speed, intermittent operations, sudden jerks etc.
• When the machine is worked at slow speed and high pressure.
• In situations where bearing has to be protected against entry of dirt, dust, moisture etc because greases are less liable to contamination by these.
• In situations where dripping or spurting of oil is undesirable because unlike oils, greases if used do not splash or drip over articles being prepared by the machines e.g., machines used in paper, food, textile and dying industr .
