Original title: What are the types of rotary drilling bits? Introduction of rotary drill bit manufacturer on classification of rotary drill bits: Common rotary drill bits include auger bits, rotary buckets, barrel core bits, underreamer bits, percussive bits, percussive grab cone bits and hydraulic grab buckets 1. Auger bit (1) Conical: double head double screw,mining dth bit, suitable for hard bedrock. Double-headed single screw, suitable for weathered bedrock, pebbles,down the hole bit, frozen soil with ice, etc. The above drill bits are equipped with various picks, and many types of drill bits can be derived through the changes of tooth type, pitch and helix angle. (2) Straight screw bit: a. Bucket tooth straight screw: double-head double-screw, Tapered Rock Bit ,rock drilling tools, suitable for sandy soil, small-diameter gravel layer with poor cementation; double-head single-screw ? IV. Reaming drill bit In order to improve the bearing capacity of single pile on the basis of no increase of pile diameter and pile depth, the design department often uses belled pile to realize the hard bedrock of rotary drilling rig. Because the rotary drilling is a non-circulation drilling,Mining Drilling Equipment, the slag can be removed with a slag removal bucket after the bottom expansion is completed. Bottom drill bit is enough. The commonly used reaming bit is mainly mechanical. This kind of bit is relatively simple to use and maintain. It has an upper opening type and a lower opening type. The opening mechanism is generally a four-link mechanism. It can be used for soil, strong wind, moderately weathered strata and even construction reaming without any change. You only need to select the reaming back to Sohu to see more. Responsible Editor:. wt-dthtools.com