Question

why are oils and grease used in machinery​

Answer 1

Answer:

So a lubricant is a substance that reduces friction, heat, and wear when introduced as a film between solid surfaces. Using the correct lubricant helps maximize the life of your bearings and machinery, therefore saving money, time, and manpower, thus making operations more efficient and more reliable.

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Answer 2

Answer:

to reduce friction between rubbing parts which reduces heat produced and increase the life of machines