- 2071 Bhadra · 1+2 marks
Lubricants and applications of types
Short answer
A lubricant reduces friction and wear. Thin mineral oils are used in watches and instruments, medium oils in engines, thick oils in heavy machines. Greases serve bearings, chassis and open gears where oil cannot stay. Solid lubricants like graphite and MoS₂ are used at high temperature, in vacuum, or where contamination must be avoided.
What is lubricant? Write about the application of different types of lubricants.
A lubricant is a substance introduced between two moving or sliding surfaces to reduce friction and wear between them.
Applications of the types
- Liquid lubricants (oils): thin mineral oils in watches, sewing machines and instruments; medium oils in engines, gearboxes and turbines; thick oils in heavy machines. Vegetable oils in food machinery; synthetic oils at extreme temperatures.
- Greases: in bearings, chassis, axles and open gears where oil cannot stay, at heavy load and slow speed.
- Solid lubricants: graphite and MoS₂ at high temperature, in vacuum, and where oil would contaminate, such as in food and textile machines.
✓ Answer checked by Claude Opus 5.5 (high effort)
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