A CNC (Computer Numerical Control) gear hobbing machine is a specialized machine tool that is used for cutting gears. It is typically used to cut gears with straight or helical teeth, and can also be used to cut splines and other types of complex gear profiles.

The CNC gear hobbing machine consists of a bed, a headstock, a tailstock, and a hobbing cutter. The bed provides the foundation for the machine and supports the other components. The headstock holds the workpiece, which is typically a gear blank, and rotates it. The tailstock holds the hobbing cutter, which is a specialized cutting tool that is used to cut the gear teeth.

The machine is controlled by a CNC controller, which receives instructions from the operator and controls the movement of the hobbing cutter and the rotation of the workpiece. The hobbing cutter is typically a multi-toothed cutter that rotates at high speeds and cuts the gear teeth as it moves along the workpiece.

CNC gear hobbing machines are used in the manufacturing of gears for various industries such as aerospace, automotive, and power transmission. They are known for their high precision, high productivity and ability to cut gears with complex shapes and profiles.

Overall, the CNC gear hobbing machine is a specialized machine tool that is used to cut gears with high precision and efficiency. It is widely used in the manufacturing of gears for various industries, and its CNC control allows for precise control of the cutting process, and high productivity.