According to the cutting movement and the corresponding blade shape, the tool can be divided into three categories

General tools such as turning tools, planers, milling cutters (excluding forming turning tools, forming planers and forming cutters), boring tools, drills, reamers, reamers and saws; forming knives, With the same or close to the same size of the workpiece, such as forming a knife, forming planer, forming cutter, broach, cone reamer and a variety of thread processing tools; Toothed or similar workpieces such as hobs, shaper shaper, shaving cutter, bevel gear planer and bevel gear cutter.