what is power screw
The power screw are used to convert rotary motion into translatory motion. for example , in case of the lead screw of lathe, the rotary motion is available but the tool has to be the advanced in the direction of the cut against the cutting resistance of the material. In case of of screw jack, a small force applied in the horizontal plane is used to raise or lower a large load. power screws also used in vices, testing machine, presses, etc. power screw also known as translation screws .