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Hydraulic Jack:
A hydraulic jack is a mechanical device that uses fluid pressure (hydraulic oil) to lift, move, or compress heavy objects. It operates based on Pascal’s law, which states that when pressure is applied to an incompressible fluid in a closed system, that pressure is transmitted equally in all directions.
Main Components of a Hydraulic Jack:
Oil Reservoir – Holds the hydraulic oil.
Manual or Electric Pump – Used to generate the initial pressure in the oil.
Cylinder – The chamber in which the piston moves.
Piston or Moving Piston – The part that lifts the load through its movement.
Check Valve – Prevents the oil from flowing backward.
Lever or Handle – In manual jacks, it is used by the operator to apply force.
Types of Hydraulic Jacks:
Bottle Hydraulic Jack:
It has a cylindrical shape resembling a bottle.
Applications: Vehicle repair, workshops, heavy industries.
Floor Hydraulic Jack (Trolley Jack):
It has a long arm and wheels for easy mobility.
Applications: Automotive repair shops.
Scissor Hydraulic Jack:
Combines scissor mechanism and hydraulic system.
Applications: Light vehicles.
Industrial Hydraulic Jack:
High-capacity (tens of tons).
Applications: Construction, bridge building, and military industries.
Advantages of Hydraulic Jacks:
Ability to lift very heavy loads with minimal force.
High precision in motion control.
Long lifespan with proper maintenance.
Greater safety compared to mechanical jacks.
Common Applications of Hydraulic Jacks:
Vehicle repair and tire replacement.
Construction and civil engineering industries (bridge building, moving heavy equipment).