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Presentation of
Lubricants
Welcome
To
My Presentation
Name: Md. Zahirul Islam
Roll:333
Batch:12th
Department of pharmacy
World University of Bangladesh
Lubricants
Lubricants are those substances, which are Used to
reduce the force of Friction between two sliding
surfaces.
Lubrication
Lubrication is the process, or technique employed to
reduce wear on surfaces in close proximity, and
moving re...
Composition of lubricants
 Typically contains 90% base oil(petroleum-mineral
oils) and less than 10% additives
 Non liqu...
Additives
The properties of a lubricant can be improved by
adding certain chemicals
 Anti oxidants
 Foam depressants
 C...
Different Lubricating conditions
 Dry Lubrication- No lubricant present between the
surfaces
 Boundary lubrication (Thin...
Objectives of Lubrication
 To reduce frictional resistance.
 To reduce wear on the bearing surfaces.
 To protect the be...
Lubricating Methods
 Oil can
 Oil gun
 Grease packing
 Wick type
 Bath type (Splash)
 Circulation (pressure)
Types of Lubricant
 Animal oils - From animal fats
 Vegetable oils - From plant seeds
 Mineral oils - Hydrocarbons obta...
Types of Lubricants
 Solid lubricants e.g Wax, Talc, Mica, Molibdenum
disulphide
 Semi solid lubricants e.g. Grease and ...
Properties of Lubricant
 Viscosity - Resistance of a liquid to flow.
 Oiliness- Ability of the lubricant to stay in plac...
Properties of Lubricant
Volatility
o It shows the evaporation behavior of lubricant at high
temperature.
o A good lubrica...
Properties of Lubricant
Corrosion Stability
 It is properties of lubricant which represents its
resistance toward the me...
Functions of Lubricants
 Keep moving parts apart
 Reduce friction
 Transfer heat
 Carry away contaminants & debris
 T...
Thanks
To
All
Thanks
To
all
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Lubrication ppt.

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Lubrication ppt.

  1. 1. Presentation of Lubricants
  2. 2. Welcome To My Presentation
  3. 3. Name: Md. Zahirul Islam Roll:333 Batch:12th Department of pharmacy World University of Bangladesh
  4. 4. Lubricants Lubricants are those substances, which are Used to reduce the force of Friction between two sliding surfaces.
  5. 5. Lubrication Lubrication is the process, or technique employed to reduce wear on surfaces in close proximity, and moving relative to each another.
  6. 6. Composition of lubricants  Typically contains 90% base oil(petroleum-mineral oils) and less than 10% additives  Non liquid lubricants contains Grease, powder(dry graphite, Molibdenum disulphite), Teflon tape used in plumbing etc.  Those non liquid lubricants provide lubrication at higher temp.(up to 350 °C)
  7. 7. Additives The properties of a lubricant can be improved by adding certain chemicals  Anti oxidants  Foam depressants  Corrosion inhibitors  Detergent Dispersers  Oiliness improvers
  8. 8. Different Lubricating conditions  Dry Lubrication- No lubricant present between the surfaces  Boundary lubrication (Thin film) -This condition is found on machine slide ways (Lathe cross slide, milling machine table). No oil film Thin oil film
  9. 9. Objectives of Lubrication  To reduce frictional resistance.  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.
  10. 10. Lubricating Methods  Oil can  Oil gun  Grease packing  Wick type  Bath type (Splash)  Circulation (pressure)
  11. 11. Types of Lubricant  Animal oils - From animal fats  Vegetable oils - From plant seeds  Mineral oils - Hydrocarbons obtained from minerals  Synthetic oils - From various chemicals  Grease - Semi-fluid lubricant  Dry - Molybdenum disulphide, Graphite
  12. 12. Types of Lubricants  Solid lubricants e.g Wax, Talc, Mica, Molibdenum disulphide  Semi solid lubricants e.g. Grease and Vaseline  Liquid Lubricants e.g. Mineral oils, Vegetable oils, Animal oils  Synthetic lubricants e.g. Polyglycols, Silicones, Organic amines, Imines, Amides.
  13. 13. Properties of Lubricant  Viscosity - Resistance of a liquid to flow.  Oiliness- Ability of the lubricant to stay in place between the bearing surfaces.  Stability –Retention of properties as long as possible (Oxidization, Biological degradation, Dilution)
  14. 14. Properties of Lubricant Volatility o It shows the evaporation behavior of lubricant at high temperature. o A good lubricant should have low volatility Emulsification o It is the property of a lubricant due to which the lubricating oil mixed with water to form an emulsion. o A good lubricant should have low emulsion number.
  15. 15. Properties of Lubricant Corrosion Stability  It is properties of lubricant which represents its resistance toward the metals.  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.
  16. 16. Functions of Lubricants  Keep moving parts apart  Reduce friction  Transfer heat  Carry away contaminants & debris  Transmit power  Protect against wear  Prevent corrosion
  17. 17. Thanks To All
  18. 18. Thanks To all

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