The classification of the threaded drill bits is as follow.

The classification of the threaded drill bits is as follow. The threaded drill bits are composed of tungsten carbide and skirts. According to the shapes of tungsten carbide, the threaded drill bits can be divided into button bits and insert bits. According to different designs of skirts, the threaded drill bits can be divided into standard design, retrac and drop center design and reaming design. According to different fixing processes, the threaded drill bits can be divided into hot insert process, cold pressing process and welding process.