This Video shows lead screw driven scissor lifting table which is manually operated. This project is for final year mechanical ,diploma students .

A scissors lift table uses a scissors mechanism to raise and/or lower goods. They are also used to transport these goods over small distances. Many industrial operations use lift tables for various purposes, such as vehicle loading and docking, work positioning, handling loads, and as wheelchair lifts.
Lift tables can come in a vast array of configurations and can be built to suit various highly specialized industrial processes. The most common lift table design incorporates hydraulic cylinders and an electrically powered pump to actuate the scissor lifting mechanism. Lift tables can also be driven by pneumatic sources, trapezoidalthreaded screw drives, push chains or by hydraulic foot pump when the load is not heavy. Lift tables can be mounted in a pit for floorlevel loading, especially useful for access by manual palletpump trucks and the mobility impaired or wheelchair users.

Applications :
Common applications include pallet handling, vehicle loading and work positioning.

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