Choosing the right rotary drilling teeth can effectively improve work efficiency and save production costs.
On the other hand, poor-quality rotary drilling teeth can bring endless trouble to construction.
So, how do you choose good rotary drilling teeth?
Tip 1: Avoid purchasing teeth with high graphite impurities
Currently, most manufacturers of rotary drilling teeth on the market do not meet the standards, and the main issue is excessive graphite impurities. Excessive graphite impurities can result in teeth hardness not meeting the standards, leading to breakage and fragmentation. This is not an exaggeration; such cases are quite common in practical use. Many manufacturers, in order to save coal mining costs, often neglect the selection of teeth, which results in the purchase of inferior rotary drilling teeth produced by unknown manufacturers. These teeth often contain a significant amount of graphite impurities, with uneven grain distribution, resulting in insufficient hardness of the rotary drilling teeth. During actual use, rotary drilling teeth experience high stress and can fracture when encountering hard coal mines, rocks, and other objects.
Tip 2: Fracture due to high stress
Most manufacturers of rotary drilling teeth on the market currently use copper-zinc brazing materials. The welding temperature of this material can reach over 900 degrees, and the expansion coefficient between the metals generated is relatively large, resulting in significant tensile stress. During the use of rotary drilling teeth, the impact wear of the teeth generates high temperatures, and the tensile stress produced by these copper-zinc brazing materials imposes a significant load on the teeth. This load comes partially from the hard coal mines outside the teeth, and partially from the tensile stress itself, making the teeth prone to fracture.