With the rapid development of the domestic rotary drilling industry, the demand for dth drill rods is also increasing. Especially in recent years, the domestic demand for rotary drilling rigs is increasing year by year. Because of this, the demand for rotary digging teeth is also increasing.
1. Do not buy rotary digging teeth with many graphite impurities

Some manufacturers of rotary digging teeth do not meet the standards, the most important of which is that there are too many graphite impurities, and too much graphite impurities will cause the hardness of the rotary digging teeth to fail to meet the standard, resulting in fracture and breakage. This is not sensational, in actual use, such a situation is more common.

In order to save the cost of coal mining, many manufacturers often do not pay attention to the selection of rotary digging teeth, so they will buy some rotary digging teeth with poor quality. These rotary digging teeth are often unknown in the manufacturing process. The defective products produced by different manufacturers contain a large amount of graphite impurities, and the grain distribution is not uniform, which leads to the insufficient hardness of the rotary digging teeth. In the actual use process, the rotary digging teeth will generate a high stress state when they are in use, and when encountering hard coal mines, rocks and other objects, they will be broken.

2. Do not buy rotary digging teeth with high stress

At present, most of the domestic rotary digging tooth manufacturers use copper-zinc solder. The welding temperature of this material can generally reach more than 900 degrees, and the expansion coefficient between the metals is relatively large. will produce a large tensile stress. In the process of using the rotary digging teeth, because the rotary digging teeth will generate high temperature, the tensile stress generated by these copper-zinc brazing materials will cause the rotary digging teeth to be heavily loaded, some of which come from coal mines with strong external hardness of the rotary digging teeth. , and the other part is the tensile stress from itself, so it is easy to break the teeth of the rotary digging.

To sum up, manufacturers need to comprehensively consider the above two requirements when purchasing rotary digging teeth for water well drilling pipe. Only in this way can they choose products suitable for their own equipment, further improve the production efficiency of manufacturers and save production costs.