ABOUT POWER SCREW, ITS ADVANTAGES LIMITATION AND APPLICATION

WHAT IS INTRODUCTION ?

• Power  screw  is a screw and nut system used to convert angular motion into linear motion and, normally , to transmit the power.
• The essential elements of a power screw are : a screw and a nut. A power screw can be machine powered or manually  operated.
• In order to cause the relative motion between two elements i.e. screw and nut, a torque is applied to one of these two elements, causing it to rotate and move either itslef or the other element in an axial direction.

• Advantager of power screw :       

           (i)  The power screws can be used for converting the angular motion into linear motion.

             

           (ii) The power screws have high efficiency, and hence, are used for transmitting the power.

• Limitation of power screw :
• The strength of power threads is lower than the V-threads.
• Applications of power screws :
• The applications of power screws are : lead screws of machine tools, screw jacks, C-clamps, mechanical presses, tensile testing machines, and vices, etc.