SCREW JACK

A screw jack is a mechanical device that can increase the magnitude of an effort force.Screw jack is used in applications where linear motion is required. Lifting of any load, pushing or pulling of mechanical equipment, adjusting of tight clearances of mechanical parts can be done by screw jacks. Mechanical capacity of screw jacks is between 5kN and 2000kN. Jack screws can be used as linear motors, linear actuators, or mechanical lifts depending on type of motion.

The effort force for a screw jack when neglecting friction can be expressed as:-

F = (Q p) / (2 π R)         (1)

where

F = effort force at the end of the arm or handle (lb)

Q = weight or load (lb)

p = pitch distance or lead of thread in one turn  (in)

r = pitch radius of screw (in)

R = lever-arm radius (in)

Screw Jack Applications:-

Paper, press, printing industry
Gypsum factories
Sheet metal forming machinery
Mechanical lifting applications
Platform lifting applications
Food processing machinery
Construction sector
Bridge jacks for road and bridge lifting
Shipyards
Opening and closing of penstocks
Industrial process
Roll form machinery
Mining industry
Defense industry
Lift tables

Stage setup applications