Couplings are elements used to connect two shafts during power transmission. Design of couplings plays a vital role in determining the power transmission capacity of the shaft at the rated rpm, which is very crucial. The design specification of coupling varies differently based on the requirements and involves a sequential design procedure which is tedious and time-consuming. This paper deals with developing a program code for the protected type flange coupling in an Object Oriented Programming (OOP) language like “PYTHON”, which takes input (like required power input, no of rotations and desired factor of safety etc.) from designers, and then accordingly calculates the specifications of the coupling using design standard formulas and iterative procedures until the design meets the safe criteria. The final specifications are displayed along with the list of recommended materials for the coupling based on the design. The main objective of the paper is to write a generalized python program for the design of protected type flange couplings for any selected material considering all the design parameters. The activity tends to lead the manufacturing operations towards a more time-efficient, cost-effective and a more reliable and an optimised way of designing machine elements and aims to give better clarity to shopfloor workers .