Abstract: Currently, many types of string hopper machines are available in Sri Lanka. One is a rotary type and the other one is the lever type string hopper machine. Rotary type machine which is available in the local market has a main drawback of having to remove the cylinder for each batch of 100 string hoppers [1]. For this task handle should be rotated until the rack comes to its uppermost position which makes the operator fatigued and consumes more time.