An auger drill bit mainly consists of a drill tip, auger blades (screw blades), and connecting flanges. Structurally, it can be divided into two main categories: straight auger and conical auger. Straight auger structures, depending on the number of drill bits and the number of augers, can be further subdivided into various forms such as single-head auger, double-head single-head auger, and double-head double-head auger. The pitch (helix angle) of the drill bit varies depending on the geological conditions and soil-throwing performance requirements. The auger blades are mostly made of cast steel, while the drill tip and connecting flanges are often precision-machined from wear-resistant, high-carbon steel.
