Mechanical springs used in any machine hold its own stiffness value. This stiffness/ spring rate changes according to different springs and its application. Stiffness of any spring is an important factor as far as its application is considered. Hence in industries many methods are used to test and calibrate springs. Many methods are been used to test springs such as hydraulic actuators or by applying external load etc. In search of the most advanced machinery to test springs, basic mechanisms are under looked. This leads to inefficient growth of machines. Considering this factor manual spring testing machine is developed. No external load, no hydraulic actuators, no external power supply, only use of solid mechanism which lead this machine to apply an external load up to 6000 - 7000N. Only considering one parameter i.e. force applied by a plate on spring leading to deflection. This machine is used to convert circular motion of gears to a linear motion of a plate. Deflection of spring takes place due to force applied by the plate on the spring. Results are compared with UTM. Required modification and optimization is done to optimize the result. This paper illustrates the basic comparison of results of STM with UTM.