 To convert the turning motion of the driver into to and fro motion of the link  To ease the effort to be exerted by the driver for the steering of the vehicle  To have an exact wheel locking position to reduce the chances of overturning of the vehicle at high speeds

 Worm and worm wheel type  Worm and sector  Worm and double roller  Worm and nut  Recirculating ball  Rack and pinion

 It is the primitive of recirculating ball type steering gearbox  It doesn’t have the recirculating ball and the system works like and nut and bolt system

 Rack and pinion is the simplest and most widely used Steering Gearboxes in a vehicle.  It is employed in almost all the LMVs and even steering operated Three Wheelers