Button bits rock drilling tools

Types of button bits rock drilling tools

Button bits rock drilling tools are made of tungsten carbide buttons cemented into drill bits. They are used as drilling tools in hard rock formations.

• Product shape:

  The product shape mainly includes spherical bits and ballistic bits. Spherical bits have rounded buttons, while ballistic bits have an elongated oval shape.

• Drilling method:

  Button bits can be divided into top hammer button bits, down-the-hole (DTH) button bits, and angular button bits. The top hammer button bits are typically used in edge top hammer drills. The down-the-hole button bits are often used in DTH hammers, which are also part of the drill assembly. Angular button bits are generally used for holes that need to be angled precisely.

• Button design:

  In terms of button design, button bits typically have higher recessions per given area. They are also characterized by a larger area of each button. Other descriptions may refer to the shape of the hole as round or oval.

Specifications and Maintenance of Button Bits Rock Drilling Tools

Specifications

The specifications of button bits rock drilling tools can vary depending on their types, such as tapered button bits, convex button bits, and double button bits, and the specific needs of the drilling project. Here are some key features with options.

• Diameter: The diameter of button bits can range from less than 10 mm to more than 100 mm. Smaller diameters are usually used for general rock drilling, and larger ones are for special applications, such as blast hole drilling.
• Length: The length of button bits also varies greatly. Standard lengths are 100 mm, 150 mm, and 200 mm, but longer ones up to 1000 mm or more are available for deep hole drilling.
• Shank: Button drill bits usually have a shank that connects them to the drilling equipment. The shank types include round, hexagonal, and splined, among others. The selection depends on the compatibility with the drill.
• Material: Button bits are usually made of high-quality alloy steel or tungsten carbide for durability and performance. The material choice can affect the bit's life and efficacy in rock penetration.
• Button Shape: The shape of the buttons on the bits can also differ. Common forms include semi-spherical, round flat, and blunt round types. Each shape has its advantages and disadvantages regarding penetration rate, wear resistance, and hole quality.

Maintenance

Proper and timely maintenance is crucial for ensuring the long-lasting and optimal performance of button bits rock drilling tools. Here are some general maintenance guidelines:

• Always keep the button bits clean and free of debris. After each use, use a wire brush and solvent to clean the bit threads, holes, and outer surfaces. This will help prevent bit damage or drill pipe thread wear due to foreign material.
• Regularly inspect the condition of the button bits. Check for signs of severe wear, distortion, damage, or blockage of the button holes. If any issues are found, repair or replace the button bits promptly to avoid affecting drilling quality.
• Keep the button bits appropriately lubed. Apply lubricant to the bit threads and other contact surfaces to reduce friction and wear when connecting with other components. This makes it easier to assemble and disassemble them.
• Store the button bits in a dry spot when not in use, avoiding exposure to moisture or direct sunlight. Proper storage prevents rust and preserves their good condition.
• Follow the bit replacement cycle. Due to the wear-and-tear nature of button bits during use, it's normal to replace them periodically. So users should establish a certain replacement schedule according to the user's drilling conditions and button bit varieties to ensure drill efficiency and accuracy continuously.
• Pay attention to calibrate and adjust the drilling tool holding the button bits as well. Ensure their clamping force is suitable, avoiding overly large or small ones. Proper clamping force allows even wear of the button bits, thus prolonging their service life.

Scenarios

Multi-button bits feature numerous distinguished buttons, first among their characteristics. Combined wearing and impact resistance are frequently enhanced by the buttons' varying shapes from round to oval to pear. These drill bits are the go-to solution for excavating hard rock formations in coal or oil seam hydrogeological studies, where the land may contain valuable underground resources. They excel in creating drainage or ventilation tunnels, ensuring efficient air circulation and moisture control in mining areas.

In geotechnical investigations, button bits are indispensable tools for engineers seeking to understand the composition and stability of the soil and rock below the surface. By using button bits to drill exploratory boreholes, they can obtain core samples, allowing for thorough analysis and evaluation of the subsurface conditions. Button bits are versatile drilling tools in the mining and geotechnical fields, providing precise and reliable drilling for various purposes.

Cross-cut button bits and tapered bits are commonly employed in the field of water well drilling. These rock drilling tools for water wells are designed specifically to create boreholes for the extraction of groundwater. By using cross-cut button bits or tapered bits, drillers can efficiently penetrate different types of rock formations to reach aquifers, ensuring access to valuable water resources.

In construction projects involving the laying of underground pipelines or the installation of directional drilling, button bits play a crucial role. Pipeline button bits are designed to create space for the installation of pipelines, ensuring efficient and accurate drilling. On the other hand, directional drilling button bits are used to carry out directional drilling, enabling precise tunneling towards predetermined locations.

Button bits also find applications in the field of geothermal energy exploration and exploitation. They are used to drill boreholes to access geothermal reservoirs, which are valuable sources of renewable energy. By using button bits specifically designed for geothermal drilling, technicians can efficiently reach the geothermal reservoirs and facilitate the extraction of the environmentally friendly energy.

How to Choose Button Bits Rock Drilling Tools

When selecting the button bits rock drilling tools, it is crucial to check the material and durability first. In general, high-quality button bits are made of high-grade steel, such as alloy steel or carbon steel. Steel with high alloy content can provide strength and resistance to impact, while carbon steel can offer durability. Next, the drilling depth and diameter are important to consider. In most cases, the diameter of rock drilling button bits ranges from 28 mm to 152 mm. Additionally, the drill hole depth varies widely depending on the button bit type. The PDC types are usually around 3, 6, 9, or 12 m, while the DTH ones can reach over 30 m. Buyers need to choose the proper sizes according to their specific projects.

Besides, it is necessary to match the button bits with the corresponding drill rigs and rock formations. There are various types of button bits based on the drilling methods, such as DTH button bits and ballistic button bits. Moreover, different button bits are suitable for specific types of rocks. Some of them are best for soft to medium formations, while others are more appropriate for hard rock formations. For instance, DTH bits are generally suitable for medium to hard rock formations. After that, buyers should also pay attention to the manufacturing process of the button bits. The ones made with superior technology, like the heat treatment technology, can usually offer better performance in drilling.

In addition, the bit gauges are also something to consider. The gauge is the outer diameter of the button bit. It normally has 3 parts, including the heel, clearance round, and outer gage. A bit's gauge usually matches the hole size and provides a consistent footprint. Furthermore, the backhole angle is another factor that needs to be considered. The angle usually ranges from 7 degrees to 25 degrees. Buyers can choose the right ones according to their distinct project requirements. More importantly, shopping buyers can examine if the button bits have undergone quality control procedures. These kinds of procedures are usually performed to ensure the durability and reliability of the products. Finally, buyers can refer to some reviews and ratings to learn about the feedback from previous customers. This can help them make an informed decision in selecting high-quality bits.

Button bits rock drilling tools Q&A

Q1. Are bigger drill bits better?

A1. Bigger button bits rock drilling tools are not always better. They may improve productivity and be ideal for certain projects but can also increase costs, use more energy, and be more challenging to control. Button bit selection should consider rock formation, drill rig capacity, and project requirements.

Q2. What are the benefits of using multi-button bits?

A2. Using multi-button bits can improve stability and penetration rate. The separation of buttons also makes the bit easier to repair, and replacing damaged parts can extend the bit's overall life.

Q3. How can drill bit wear be reduced?

A3. Proper maintenance of the button drill bits is essential to reduce wear. Regular servicing of the drill rig to ensure optimum operational efficiency will also help. Selecting the right bit for the rock formation and drilling conditions will prevent excessive wear.

Q4. What is the ideal carbide for a rock drilling button bit?

A4. The size and shape of the carbide buttons will determine how energy from the drill is transmitted to the rock. Selecting an ideal carbide is complex, as it depends on the rock's characteristics and the drill bit's expected use. Consulting with an expert can help when selecting carbide.

Q5. What is the life of a rock drill bit?

A5. Rock drill bits typically have a service life of several hundred to several thousand meters of drilled rock. Factors, such as the rock's nature and the drill bit's material and design, influence this.