The topic of this bachelors thesis is a theoretical design of a three axis mill with dimensions up to 1x1x1 [m]. The machine is indented to have built in cooling and lubricating system, which means that the machines work space has to be enclosed. It is designed to mill wood, aluminum and steel. Designing starts with making a 3D model of the construction. Construction is separated in zones of work space, coolant container, electrical components, and the section with moving parts. After construction is designed, parts for feed movement have to be chosen. Chosen parts have to be checked whether they satisfy operating conditions. The forces during drilling and milling have to be calculated with the parameters that the machine is designed to operate. FEM (finite element method) is used to check stress applied on sliding rails and blocks during operation. Speed of the coolant at the exit of nozzle and diameter of the nozzle is selected for cooling and lubricatng system. They are used to calculate volumetric flow of coolant, and with that to calcultate needed power of the coolant pump. Other elements of the system are selected to ensure proper working conditions and to reduce damage due to metal shavings. Due to high speed of coolant, the mix of coolant and shavings can fly of in any direction. Therefore it is necessary to prevent coolant from exiting work space with various methods. Cables in work space have to be additionaly protected, and doors have to be made so that coolant wont leak when they are in open position. After mechanical part come the electrical components. Main components are spindle motor and its VFD inverter, and feed motors with drives. Auxiliary components are mechanical endstop switches, tool length sensor, lighting, ventilation, return valve for coolant, and others. This concludes the physical part of the machine. After that comes the selection of controller software. Chosen software is linuxcnc due better stability of linux operating systems, and also because it is free. Most important parts of controllers documentation are shown. Those are setting the machine up, tool changing, and working with the machine. Finally, the estimated price of the machine parts is calculated. Most parts have a known price, and for others it is estimated. With the price in mind, conclusion is made whether the machine is profitable to be made.