The selection of a drill bit is crucial to achieving optimal drilling performance. This selection is influenced by various factors, including the hardness of the soil, its abrasiveness, the drilling method, the diameter of the borehole, and its length. The type of drill bit and its corresponding borehole diameter is also dependent on the specific application, such as rock bolting, soil nailing, or micropiling.

In the self-drilling anchor system, minimizing the impact on surrounding soil and rock is a key consideration. By optimizing drilling speed and energy application, these systems maintain efficiency across various geotechnical conditions. Self-drilling anchor cross drill bits and self-drilling anchor arch drill bits are commonly used for mixed fill-type soils, such as clay, loam, soft shale, or silty clay, effectively cutting and scraping through these formations. For harder geological formations, the use of self-drilling anchor button drill bits with tungsten carbide inserts, self-drilling anchor cross drill bits, and self-drilling anchor three-cutter drill bits is recommended. These bits effectively utilize impact energy to penetrate dense and abrasive materials.

The selection of the appropriate drill bit type is crucial for ensuring efficient installation, durability, and compatibility with diverse ground conditions, making it a vital component of the self-drilling anchor system.