mini cnc milling machine 1.600* 600mm working range 2. ... motor 4.HIWIN guide rail High quality mini cnc milling machine for metal(7STC-6060A) Product features: With 600mm* 600mm ... nut, and the balls rolling fast when the machine working. For the coefficient of rolling friction is smaller, ... manufacturer of all kinds of CNC engraving machines, suitable for various of materials, such as: wood, stone, jade ...