Milling, as one of the particle separation processing, is performed on machine tools – milling machines. The parameters to pay attention to when milling are cutting speed, processing depth and feed. Milling achieves high productivity and efficiency in mass production. This graduate work is based on systems and drives for shear motions on milling machines, their performances and main tasks. Introductory part of this graduate work contains a brief description of the development of milling. At the beginning, particle separation processing is described as well as advantages and disadvantages of this processing. The milling process is also described as a chapter of movements that occur is introduced, and special attention was paid to shear motion. Further in the graduate work, a linear guidance system and gearboxes with their tasks are described. Different versions of the drives for shear motions are shown and their main characteristics are described. Drives for shear movements are very important machine tools modules that enable continuous particle separation processing and they must also allow a change in the value of the shear motion. These drives also serve to approach the cutting tool and to move away the cutting tool from the workpiece. Last chapter describes electric motor drives, their tasks, and which electric motor drives are used in milling machines. Special attention is paid to the characteristics of the engine when choosing a particular electric motor drive.