What are the functions of lubricants.
Give the important functions of lubricant.
1 . It reduces surface deformation, wear and tear because direct contact between the rubbing surface is avoided.
2. It reduces the frictional heat, or it acts as a coolant. This reduces the expansion of metal.
3. It increases the maintenance cost and running costs of machine.
4. It makes the relative motion of sliding parts smooth and noise free.
5. It increases the efficiency of machine by minimizing the loss of mechanical, electrical or chemical energy.