what is grease they use in gears and stuff? Why does it need to be replaced occasionally?
In: Engineering
You know how machines need oil to run smoothly without getting stuck?
Grease is just oil mixed with something to make it thicker. Usually some kind of soap.
Why do this? The main reason is that oil tends to drip downwards and get lost. With grease, it sticks to the place you need it. Then over time, the grease “bleeds” small amounts of oil and the machine stays lubricated longer.
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