This bachelor thesis deals with the improvement of the technological machining process and the transition from conventional to numerically controlled machine tools machining. The main objective, apart from improving the technological machining process itself, is to increase the quality and repeatability of the product as well as the production quantity while using as few as possible of machine tools (CNC lathe, CNC milling machine). The introductory section describes the existing technological machining process of the fork assembly manufacturing where frequent problems of manufacturing are highlighted. In the following, the improved technological machining process of the fork assembly components is described, elaborated in a meaningful whole and is given a sequential overview of the required operations and tools. Particular attention is paid to conceptualization and design of auxiliary clamping devices, which greatly assist in the realization of the entire improvement, because in one clamping device, a large number of components of the fork assembly (fork body and bolt) are positioned, clamped and machined. All components are designed and operations simulated in the 3D virtual representation of Solidworks 2015. Lastly, possible additional and future improvements of the technological machining process of fork assembly is commented.