Multicone Drill Bit Diameter Specification Table: Comprehensive Overview of Brands and Models

Introduction to Multicone Drill Bits

Multicone drill bits, also known as tricone drill bits, are specialized drilling tools widely used in various industries such as oil and gas exploration, mining, geological prospecting, and water well drilling. These drill bits feature multiple cones (usually three) that rotate independently, allowing them to effectively break through different types of rock formations. The design of multicone drill bits enables them to handle a wide range of drilling conditions, from soft to extremely hard rock, making them a versatile and essential component in drilling operations.

The diameter of a multicone drill bit is a crucial specification as it determines the size of the hole that can be drilled. Different applications require different hole diameters, and manufacturers offer a variety of multicone drill bits with varying diameters to meet these needs. In addition to diameter, other important specifications include the type of teeth (milled tooth or tungsten carbide insert), the number of cones, and the overall design of the drill bit, which can affect its performance and durability.

Major Brands and Their Multicone Drill Bit Models

1. ENG Brand

ENG is a well – known manufacturer in the drilling industry, offering a range of high – quality multicone drill bits. One of their notable models is the 7 – 1/2″ TCI Tricone Drill Bit of API Spec.

Diameter Specifications: This model comes in a standard diameter of 7 – 1/2 inches (190.5 mm). However, ENG also provides a wide range of other diameters, from 3 5/8″ (92.075 mm) to 26″ (660.4 mm), to cater to different drilling requirements.

Tooth Type: It uses tungsten carbide insert (TCI) teeth, which are extremely hard and wear – resistant. The TCI teeth are designed to cut through middle – hard to hard rock formations effectively, making this drill bit suitable for applications such as coal mining, geological exploitation, and water well drilling.

Design Features: The drill bit is manufactured according to API (American Petroleum Institute) specifications, ensuring high quality and reliability. It has a tapered – length design, which helps in better heat dissipation during drilling operations. The drill bit is also equipped with laser – welded or high – frequency – welded TCI inserts, which provide a strong bond between the inserts and the cone body, enhancing the overall durability of the drill bit.

Performance: In laboratory tests, ENG’s TCI tricone drill bits have shown excellent performance. They can drill 50% faster and last 35% longer than general – purpose counterparts when drilling high – PSI concrete and reinforced concrete. This makes them a cost – effective choice for drilling operations that require high efficiency and long – lasting performance.

2. DANYANG DAMING TOOLS CO., LTD.

DANYANG DAMING TOOLS is a reputable manufacturer that offers a variety of drilling tools, including multicone drill bits. Although they may not be as well – known globally as some other brands, they have a strong presence in the domestic market and are known for their high – quality products.

Diameter Specifications: Their multicone drill bits come in a range of diameters to suit different drilling needs. While specific diameter options may vary depending on the model, they generally offer diameters from relatively small sizes for precision drilling to larger sizes for heavy – duty applications. For example, some of their models may have diameters starting from around 2 inches (50.8 mm) and going up to 12 inches (304.8 mm) or more.

Tooth Type: They offer both milled tooth and TCI insert types of multicone drill bits. The milled tooth drill bits are suitable for soft to very soft rock formations, such as clay, shale, and soft sandstone. The TCI insert drill bits, on the other hand, are designed for middle – hard to hard rock formations, including limestone, granite, and basalt.

Design Features: DANYANG DAMING TOOLS’ multicone drill bits are manufactured using high – speed steel (HSS) or other high – quality materials, ensuring good strength and durability. They have a variety of shank types, including straight shank, tapered shank, hex shank, and triangular shank, to fit different drilling equipment. The drill bits also feature different flute designs, such as single – flute, three – flute, four – flute, etc., which can affect the chip removal efficiency and drilling speed.

Performance: These drill bits are known for their reliable performance in various drilling conditions. They are designed to provide smooth and efficient drilling, with minimal vibration and deviation. The use of high – quality materials and precise manufacturing processes ensures that the drill bits can withstand high – pressure and high – temperature environments during drilling operations.

3. Jiangsu Goldmoon Industry Co., Ltd.

Jiangsu Goldmoon Industry is a large – scale manufacturer of drilling tools, offering a comprehensive range of products including multicone drill bits. They have a strong focus on research and development, constantly improving their products to meet the evolving needs of the market.

Diameter Specifications: Their multicone drill bits are available in a wide range of diameters. For example, they may offer diameters from 1 inch (25.4 mm) up to 16 inches (406.4 mm) or more, depending on the specific model. This wide range of diameters allows customers to choose the most suitable drill bit for their particular drilling project.

Tooth Type: Similar to other manufacturers, Jiangsu Goldmoon Industry provides both milled tooth and TCI insert multicone drill bits. The milled tooth drill bits are made from high – carbon steel and are suitable for soft rock formations. The TCI insert drill bits use high – quality tungsten carbide inserts, which are highly resistant to wear and can handle hard rock formations effectively.

Design Features: The company’s multicone drill bits are designed with precision and attention to detail. They have a variety of surface finishes, such as black finish, white finish, and titanium – coated finish, which can improve the drill bit’s corrosion resistance and appearance. The drill bits also feature optimized flute geometries for efficient chip removal and reduced heat generation during drilling.

Performance: Jiangsu Goldmoon Industry’s multicone drill bits are known for their high performance and long service life. They are tested rigorously during the manufacturing process to ensure that they meet strict quality standards. In real – world drilling operations, these drill bits have demonstrated excellent durability and efficiency, helping customers to complete their drilling projects on time and within budget.

Detailed Introduction to Specific Multicone Drill Bit Models

1. ENG 7 – 1/2″ TCI Tricone Drill Bit

This model is a high – performance multicone drill bit designed for demanding drilling applications. Its 7 – 1/2″ diameter makes it suitable for medium – to large – scale drilling projects, such as water well drilling in hard rock formations and geological exploration.

The TCI teeth on this drill bit are made from high – quality tungsten carbide, which is one of the hardest materials available. The teeth are precisely shaped and arranged on the cones to ensure optimal cutting performance. During drilling, the TCI teeth can easily break through hard rock, creating a smooth and round hole.

The drill bit’s body is made from high – strength alloy steel, which provides the necessary strength and toughness to withstand the high – pressure and high – torque conditions during drilling. The tapered – length design helps in distributing the heat generated during drilling more evenly, reducing the risk of overheating and premature wear.

In terms of connection, this drill bit features a 1 1/4″ – 7 UNC female thread or 1/2″ BSP thread, which allows it to be easily attached to different types of drilling equipment. It can be used with dedicated core drills or rigs, providing flexibility in drilling operations.

2. DANYANG DAMING TOOLS Customized HSS 3 Flutes Taper Countersinking Drill Bit

Although this is a countersinking drill bit, it also incorporates some of the design principles of multicone drill bits in terms of its multi – flute structure. This model is designed for metal drilling applications, especially for creating conical holes for countersunk bolts or screws.

The drill bit has a diameter range of 4.3 to 40 mm and an overall length of 40 – 80 mm, allowing it to be used for a variety of metal drilling tasks. It is made from high – speed steel (HSS), which provides good hardness and wear resistance. The HSS material can withstand the high – temperature and high – pressure conditions generated during metal drilling.

The three – flute design of this drill bit is a key feature. The multiple flutes help in efficient chip removal, reducing the risk of chip clogging and improving the drilling speed. The flutes are precisely ground to ensure smooth and consistent chip flow. The drill bit also has different degree options (60 degree, 90 degree, 120 degree) for the countersink, allowing users to create different angles of conical holes according to their specific requirements.

The shank of the drill bit can be straight, tapered, hex, or triangular, providing compatibility with different types of drilling machines. The surface of the drill bit can be bright, titanium – coated, or aluminum – coated, which not only improves its appearance but also enhances its corrosion resistance.

3. Jiangsu Goldmoon Industry 25PCS HSS Fully Ground Twist Drill Bit Set

While this is a set of twist drill bits, it includes some models that can be used in conjunction with multicone drill bits or for similar drilling applications. The set contains 25 fully – ground HSS twist drill bits with sizes ranging from 1.0 – 13.0 * 0.5 mm.

These twist drill bits are made from high – speed steel, which gives them good strength and hardness. The fully – ground process ensures that the drill bits have precise dimensions and smooth surfaces, reducing friction during drilling and improving the drilling accuracy. The amber finish on the drill bits provides some corrosion resistance, protecting them from rust and other forms of degradation.

The twist drill bits in this set are suitable for a wide range of materials, including wood, metal, PCB (printed circuit board), and masonry. This versatility makes them a valuable addition to any drilling toolkit. They can be used for precision drilling tasks, such as creating small holes in metal sheets for fastening purposes or drilling holes in PCBs for electronic components.

The set comes in a metal box, which provides convenient storage and transportation. The drill bits are arranged neatly in the box, making it easy to find the required size when needed. This set is an excellent choice for DIY enthusiasts, hobbyists, and professionals who need a variety of small – diameter drill bits for different projects.

Conclusion

Multicone drill bits are essential tools in the drilling industry, offering high efficiency and versatility in various drilling applications. The major brands such as ENG, DANYANG DAMING TOOLS, and Jiangsu Goldmoon Industry provide a wide range of multicone drill bit models with different diameter specifications, tooth types, and design features to meet the diverse needs of customers.

When selecting a multicone drill bit, it is important to consider factors such as the type of rock formation to be drilled, the required hole diameter, the drilling equipment available, and the budget. By choosing the right multicone drill bit, drilling operators can achieve optimal performance, reduce downtime, and complete their drilling projects successfully. With the continuous advancement of technology and the ongoing research and development efforts of manufacturers, we can expect to see even more innovative and high – performance multicone drill bits in the future, further improving the efficiency and effectiveness of drilling operations.