what are coolants?give an example.

Coolants are the substance used to prevent overheating of devices.coolants are used to remove excessive heat from the devices.coolants can be solid,liquid or gases.

for example : in cutting operations heat produced due to friction between tool and the work piece is high,which can lead to tool failure so to avoid overheating of tool coolant is used.

examples of coolants:oils, oil-water emulsions, pastes, gels, aerosols