① Integral type: The cutter body and the cutter teeth are made into one piece.
② Integral welding tooth type: The cutter teeth are made of cemented carbide or other wear-resistant tool materials, and are brazed on the cutter body.
③ Insert type: The cutter teeth are fastened on the cutter body by mechanical clamping. This replaceable tooth can be used as the head of the overall tool material, or it can be used as the head of the welding tool material. The milling cutter with the cutter head mounted on the cutter body is called the internal grinding type; the cutter head is sharpened separately on the fixture is called the external grinding type.
④ Indexable type (see indexable tool): This structure has been widely used in face milling cutters, end milling cutters and three-sided milling cutters.
