The Model Y3140CNC4-6, Y3150CNC4-6 and Y3160CNC4-6 series CNC heavy-duty gear hobbing machines are of 4-6 axes CNC ones. With carrying out index motion and differential compensation by electronic gearbox (EGB), and by optimum design concept, the machines have features of compact construction, high efficiency and reliability through adopting the shortest transmission train and reliable transmission method. They are designed to cut cylindrical spur & helical gears, crowning or slightly tapered gears, less teeth gears and splines, etc. These series machines are suited for the gear production industries, such as engineering machinery, marine, heavy-truck and lift, etc.