Hey...Guys I am Gaurav Bhagat In this presentation topic Lubricants, I Have Covered many Parts... 1. Lubricants and their Examples. 2. Friction and Real life Examples. 3. Lubrication and its Composition. 4. Additives and its Certain Chemicals. 5. Objective of Lubrication. 6. Lubricating Methods. 7. Types of Lubricants. 8. Classification of Lubricants. 9. Properties of Lubricants. 10. Function of Lubricants. Thankyou guys!! I Hope its help you !!

1. LUBRICANTS
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2. Lubricants
Lubricants are those substance,
which are used to reduce the force
of Friction between two sliding
surfaces.
For example - motor oil,
friction modifier, friction additive,
gel, silicones, fluorocarbons, etc.

3. Friction
• Friction, force that resists the sliding or
rolling of one solid object overanother.
 Real Life Example of Friction:-
1. Driving of the vehicle on a surface.
2.The dusting of the carpet bybeating
it with a stick.

4. Lubrication
Lubrication is the process, ortechnique
employed to reduce wear on surfaces
in close proximity, and moving to each
another.

5. Composition of lubricants
• Typically contains 90% base oil (petroleum-mineral) and less than 10%
additives.
• Non liquid lubricants contains Grease, Powder(dry graphite,
Molybdenum disulfide), Teflon tape used in plumbing etc.
• Those non liquid lubricants provided lubrication at higher temp.(up to
350 °C)

6. Additives
The propertiesof a lubricantscan be improved
by adding certainchemicals:-
• Anti-oxidants
• Foamdepressants
• Corrosioninhibitors
• Detergent Dispersers
• Oiliness improves

7. To reduce frictional resistance.
Objectives
of
Lubrication
To reduce wear on the bearing surfaces.
To protect the bearing surfaces from corrosion.
To carry away heat from the bearing.
To reduce noise from the moving Components of
the machine.

8. Lubricating
Methods
Oil can
Oil gun
Grease packing
Wick type
Bath type(splash)
Circulation(pressure)

9. Types of Lubricant
Animal oils –From
animal facts
Vegetable oils –From
plant seeds
Minerals oils –
Hydrocarbons obtained
from minerals
Synthetic oils –From
various Chemicals
Grease –Semi fluid
lubricants
Dry - Molybdenum
disulfide, Graphite

10. Classified of Lubricants
• Solid lubricants e.g. Wax , Talc, Mica, Molybdenum disulfide
• Semi solid lubricants e.g. Grease and Vaseline
• Liquid Lubricants e.g. Minerals oils, Vegetable oils, Animals oils.
• Synthetic Lubricants e.g. Polyglycols, Silicones, Organic amines, Imines,
Amides.

11. Properties of Lubricant
Viscosity – Resistance of a liquid toflow.
Oiliness - Ability of the lubricants to stay in place between the bearing
surface.
Emulsification- It is the property of a lubricant due to which the
lubricating oil get mixed with water to form anemulsion.
 Volatility– It shows the evaporation behavior of Lubricant at high
temperature.

12. Properties of Lubricant
Corrosion Stability :- It is the Properties of lubricant which represents its resistance
towards the metal.
 A good lubricant should not take part in Corrosion.
Thermal Stability :- A good lubricant must be stable towards heat.
 It should not decompose during operation at high temperature.

13. Function
of
Lubricant
Keep Keep moving parts apart.
Reduce Reduce Friction
Transfer Transfer Heat
Carry
Away
Carry Away Contaminants andDebris
Transmit Transmit Power
Protect Protect against wear
Prevent Prevent Corrosion

14. Thank you !!