Tailstock is similar to head stock placed right hand side of worker. The unit is arranged to slide along the bed and can be locked to it at any convenient point; the upper portion of the unit is fitted with what is variously called a “barrel”, “spindle” “ram” or “shoot” that can be moved in and out of the main casting by hand, lever or screw feed and carries a “Dead Centre” that supports the other end of work held (by various means) in the headstock.Special centres, which rotate with the work, can be used in the tailstock ; these are known as “Rotating Centres”.
Lathe spindle was to be driven directly from coupled motors, even using a small pulley and a larger pulley on motor and lathe respectively. It would be turning quickly to be useful for the great majority of jobs. Hence, it is necessary to introduce some way of reducing the lathe’s spindle speed. Counter shaft is used to reduce the speed of lathe spindle, means that is the job of the countershaft.