This work mainly focuses on the application of line balancing to minimize idle time of workstation in the production line. The methodology adopted includes calculation of cycle time of the process, identifying the non –value-added activities, calculation of total workload on station and distribution of workload on each workstation by line balancing, in order to improve the efficiency of line. A production line of a bearing retainer component manufactured by Porwal Auto Components Pvt Ltd, Pithampur, Dhar (M.P) is considered for this research work and time study is performed in order to determine the standard time for each process. Then, rank positional weighted method (RPW) is evaluated with the help of standardized data to solve the assembly line problem and defines the line efficiency which provides a better productivity in the existing flow line by reducing the idle time.