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A jack is mechanical device used to lift heavy loads or apply great forces. Jacks employ a screw thread or hydraulic cylinder to apply very high linear forces. A mechanical jack is a device which lifts heavy equipment. The most common form is a car jack, floor jack, or garage jack which lifts vehicles so that maintenance can be performed.

Jack Device Used for Lifting Objects

A jack is mechanical device used to lift heavy loads or apply great forces. Jacks employ a screw thread…

Sectional view of whitworth screw thread.

Whitworth Thread

Sectional view of whitworth screw thread.