Heavy-duty head assembly fabricated from rolled steel sections is mounted on top of the columns. The drive is through v-belts from high torque A.C. Electric motor via flywheel and reduction gears to the lifter-shaft. A friction lifting system is fitted to the lifter shaft which runs on spherical roller bearings (SRB) and one central phosphorus bronze bearing bush which also serves as support to the lifter shaft. The friction lifter consists of a constantly rotating drum and breaks lined steel band. This band is anchored at one end to stud in lifter drum and the other end is carried by camshaft running through lifter drum which actuated by a lever. The lever is operated with the help of a pulling cord tied to the lever at one end goes to the operating point by passing through capstan bush attached to the lifter shaft. When the cord is pulling it tightens onto the rotating capstan bush which operates the lever resulting in tightening of the brake around the brake drum with the help of the camshaft. At this stage lifter drum is rotated and to tup is lifted with the help of the nylon belt provided. On the release of the cord, the spring-loaded arrangement helps free fall of tup by disengaging the friction band immediately from the friction drum. The spring-loaded buffer work as a stopper for lifting the drum in its rest position. Positive water cooling arrangement is provided to the friction drum to prevent excessive heating.