Explain Screw Jack and Thrust collar

Screw Jack:

The screw jack is a device used for lifting heavy/huge loads, When we apply a smaller amount of effort on the handle to rotate the screw, this rotation used to move the rod in and out of the screw jack. this process is worked on the principle called inclined plane.as shown in figure Below:

                                     Screw Jack

This is the simple and commonly used screw jack from different purpose of lifting the loads. It consist of screw threaded rod which gets in to inner threads part of the screw jack. by rotating the nut with required force the adjustment of screw rod moves in and out of the body.

                                                           Thrust Collar