Which Rock Drill Bits are Better for Drilling Rock?

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In the realm of engineering construction, mineral mining, and other fields, the rock drill bit serves as an indispensable drilling tool. Its performance directly impacts the efficiency of rock drilling operations, the quality of rock crushing, and the longevity of equipment. When presented with various types and specifications of rock drill bits, it becomes imperative to determine which one offers superior performance for rock drill efforts.

Types of rock drill bits

rock drill bits

According to different connection methods, there are two types of rock drill bits: tapered bit and thread bit. This classification is the most commonly used.

Tapered bit

Tapered drilling tools refer to a type of light rock drilling tools that use the taper hole of the skirt body to connect with the cone of the drill rod to realize the impact and rotation transmission of the rock drill. Tapered drilling tools include tapered bits and drill rods. Tapered bits include chip bits and button bits, and they are mainly used in mining, tunnel engineering, roadway excavation, stone mining, and other working conditions.

Threaded bit

Because of its reliable connection, it can transmit high torque and is easy to extend the drill rod, so it is commonly used on drilling frames or drill jumbos to drill deeper and larger diameter holes.

Factors affecting the performance of rock drill bits

  • Rock properties: rock hardness, compressive strength, abrasiveness, and other factors will affect the selection and use of rock drill bits.
  • Drill bit material: drill bits made of different materials have different physical and chemical properties, such as hardness, wear resistance, and impact resistance, which will affect the rock drilling effect.
  • Drilling depth and diameter: the higher the drilling depth and diameter, the higher the requirements for the drill bit and the need to choose more wear-resistant, impact-resistant drill bits.
  • Rock drilling equipment: different rock drilling equipment requires different types of drill bits to achieve the best rock drilling results.

How to choose the appropriate rock drill bits?

rock drill bits

Selection of rock drill bits according to different application conditions

According to different rock conditions and drilling requirements, the diameter, shape, protrusion height, and gauge button angle of the cemented carbide button suitable for the rock drill bit are selected. The usual selection of button shapes is mainly spherical buttons and conical buttons, with considerations of drilling speed requirements, drilling accuracy, and drill bit service life. The conical button will also achieve good results in hard rock conditions because it will obtain more rotary resistance to ensure that the rock drilling tool is tightly connected, and it will also make the drilling more vertical. Similarly, different designs of the metal body part of the drill bit will also have various application requirements. Different layouts of slag discharge grooves and drainage holes and the design of the metal body appearance make them suitable for different rock hardness and abrasiveness.

Select rock drill bits according to project requirements

  • Drilling depth and diameter: for drilling deep holes or large diameter holes, you can choose more diameter rock drill bits, which have better rigidity and stability to ensure the accuracy and quality of drilling.
  • Rock drilling efficiency: to improve the efficiency of rock drilling, you can choose rock drilling equipment with high speed and impact force, such as a pneumatic rock drill or hydraulic rock drill. At the same time, the selection of drill bits with better wear resistance and impact resistance can further improve the drilling efficiency.
  • Cost consideration: under the premise of meeting the needs of the project, we should try our best to choose the drill bits with moderate price and high-cost performance. You can choose the most suitable drill bit by comparing the prices and quality of different brands and models of rock drill bits.

Choose rock drill bits based on equipment capabilities

  • Achieving optimal power and speed output: rock drills with diverse power and speed capabilities necessitate the selection of specialized drill bits.
  • Equipment size and interface: notable variances in equipment dimensions and interfaces exist across various models of rock drills. When selecting a drill bit, it is imperative to verify that the selected drill bit possesses the appropriate dimensions and interfaces to guarantee seamless integration with the equipment and preserve its integrity over time.

When choosing which rock drill bit is better for drilling rock, we need to comprehensively consider multiple factors such as rock type, engineering needs, and equipment capabilities. Through an in-depth understanding of the characteristics of different kinds of rock drill bits and application scenarios, as well as judgment and decision-making based on the actual situation, we can choose the most suitable type of rock drill bits to improve the efficiency of rock drilling, to ensure the quality of rock crushing and to reduce the cost of the project. At the same time, correct use and maintenance are also essential to extend the service life of the rock drill bits and improve the performance of the equipment.

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