The button bit is a rock drilling tool widely used in rock drilling engineering. It has the characteristics of free button arrangement, fast drilling speed, and a long grinding cycle and plays an influential role in many fields. Therefore, its design and selection are crucial to product quality and efficiency.
What is button bit?
The button bit consists of a tungsten carbide button inlaid on the drill bit body. It can break at multiple points and has higher rock-breaking efficiency. It can not only effectively eliminate the blind area of rock breaking but also avoid repeated breaking of rock debris. Therefore, there will be more and more applications on the construction site.
Performance characteristics of button bits
Free buttons arrangement
Compared to sheet drill bits, button bits feature a free button arrangement. It can reasonably determine the number and position of side and center teeth according to the diameter of the hole and the size of the rock-breaking load. The diameter of the drill bit is not limited.
Higher rock-breaking efficiency
Because it is multi-point crushing, the rock-breaking efficiency is higher, which can effectively eliminate the rock-breaking blind area and avoid repeated crushing of rock chips.
Longer service life
Because the abrasion of the alloy column is higher than that of the sheet drill bit, its non-grinding life is longer, and the workload of re-grinding is small, which shows high value under the operating conditions of mechanized rock drilling trolleys and deep hole mining.
How to choose a suitable button bit?
The hardness and properties of the material
Different materials have different hardness and properties, which will affect the selection of button bit. For higher hardness materials, choose the button bit with tungsten carbide to ensure the efficiency and service life of rock drilling.
Button-type selection
The shape of the button bit is the critical factor in the selection. Common button shapes include conical buttons, parabolic buttons, and ogive buttons. Each button type is suitable for different application scenarios.
| Carbide button | Advantages | Application |
| Conical Button | High drilling efficiency | medium-hard rock such as limestone, gravel, marble, pyrite, etc. from f8 to f14. |
| Parabolic Button | The button feeding speed is fast, which can not only ensure a certain rock drilling efficiency but also have a better service life. | medium hard rock moderately corrosive rock formations |
| Ogive Button | Fast button feed speed and excellent rock drilling efficiency | soft rock such as shale, clay rock, sandstone, and rock salt below f8 |
The nature of the rock
The nature of the rock will also affect the choice of button bits. According to the hardness and corrosiveness of the rock, according to the drilling methods such as open-pit, underground, tunnel drilling, production drilling, anchor hole drilling, according to the powder discharge medium such as compressed air, high-pressure water, and other media, according to the type of rock drill such as heavy, light, pneumatic, hydraulic and other factors to select the button bit.
Brand and quality
When choosing a button bit, it is also very crucial to know the brand and quality. Excellent brands usually have better structural design and manufacturing processes, which can provide more stable and reliable drilling performance. In addition, the reliable quality of the button bit has a longer service life and better wear resistance, which can reduce production costs and improve drilling efficiency. Therefore, we should choose those suppliers and brands with good reputations and experience.
Consider cost-effectiveness
When selecting a button bit, it’s crucial to consider not just its performance and quality but also its cost-effectiveness. Prices for different brands and models of button bits vary significantly, so it’s pivotal to evaluate them based on your specific requirements and budget. Additionally, it’s essential to factor in the drill bit’s service life and opt for one with greater cost-effectiveness.
Conclusion
Choosing the right button bit is the key to ensuring the smooth progress of engineering operations. When choosing a button bit, we should understand its performance characteristics, materials, tooth shape, rock properties, and brand strength. At the same time, we also need to consider cost-effectiveness and choose a drill bit with a higher cost-effectiveness. We can keep abreast of the development trends of new technologies and materials in the market to understand and master more advanced button-bit products and technologies promptly. Additionally, we can continue to accumulate experience and consult with professionals to improve the accuracy of our selection.
