Question

When would solid lubricants are used?

Answer 1

Dry lubricants or solid lubricants are material which can reduce the friction without a liquid medium . they are used where,

1. Operating conditions are such that a lubricating film cannot be formed or maintained.
2.  Contaminations of liquid or semi-solid lubricant, with dust or dirt is not desirable ;e.g., open gears.
3. Combustible lubricants must be avoided due to the high operating temperature and pressure.
4. Heavy machinery working on a crude job at very high loads and slow speed
5. Where the parts to be lubricated are not easily accessible.