In this bachelor thesis, the existing procedure for workpieces colouring based on overhead chain conveyor is described. The reasons and requirements for upgrading of the system are presented. Extension of overhead chain conveyor and calculation of its supporting structure and its drive components are preformed. Thus, a spatial model of conveyor supporting structure is designed using Solidworks software and further analysis with Abaqus software according to FEM method is conducted. Furthermore, the chain force and subsequent required pull force is determined and evaluation weather the existing electric motor meets the standards of the new operating requirements is made.