20+ Years Manufacturing Experience

Extracting teeth is wildly applied to coal mining industrial engineering construction.

Short Description:

Coal cutter bits are primarily composed of a steel base body and a hard alloy cutting head, with traditional alloy materials bearing the brand names YG11C or YG13C, featuring coarse-grain hard alloys. As the complexity of coal mining operations has increased, our company has continuously innovated in production technology. We have adopted medium-coarse grain alloy materials with 7% cobalt to 9% cobalt content. Specifically, we have developed three materials, KD205, KD254, and KD128, tailored to different mining conditions. These materials exhibit excellent stability, wear resistance, and impact resistance, significantly extending the service life and earning high favor among our customers.


For coal cutter bits, our company currently specializes in various models, including U82, U84, U85, U92, U95, U170, as well as tunnel boring machine bits like U135, U47, and S100. We offer a range of alloy diameter sizes, including 16, 18, 19, 20, 21, 22, 24, 25, 27, 28, 30, and 35. Coal cutter bits are typically cylindrical in shape, with diameters mostly below 22 for coal cutting, while diameters above 25 are primarily used for rock cutting. We have a comprehensive range of molds available, allowing us to provide excellent alloy products tailored to the diverse applications and requirements of our customers in the mining industry.

Product Detail

Product Tags



1. Coal cutting teeth are widely applied to mechanical equipment used in coal mines. They are used to cut, break, and extract coal efficiently. These teeth effectively extract coal from coal beds, facilitating subsequent processing and transportation.

2. Coal cutting teeth can also find applications in tunnel construction. They are used to cut and break rocks, soil, and other materials, aiding in tunnel excavation and construction.

3. Similar to their use in coal mining, coal cutting teeth can be employed in rock quarries and other rock excavation operations to cut and break hard rocks.


1. Coal cutting teeth need to exhibit high abrasion resistance since they encounter highly abrasive materials such as coal, rocks, and soil during the mining process. Teeth with good abrasion resistance have longer lifespans and lower replacement frequency.

2. Coal cutting teeth require adequate hardness and strength to resist deformation or fracture during cutting and breaking processes.

3. The design and shape of the cutting teeth can influence their cutting performance. Well-designed cutting teeth can enhance cutting efficiency and effectiveness while reducing energy consumption.

4. Stable tooth structures can maintain normal operation under high-stress conditions, reducing the risk of damage.

Due to the susceptibility of coal cutting teeth to wear, a design that facilitates easy replacement can reduce equipment downtime and enhance production efficiency.
Coal cutting teeth operate in various geological conditions in different coal mines. Hence, excellent cutting teeth should be adaptable to diverse geological factors, such as hardness and humidity.

In summary, coal cutting teeth play a crucial role in coal mining and related operations. Their features, including abrasion resistance, hardness, and cutting performance, directly impact mining efficiency and safety. Different types of coal cutting teeth are suitable for varying work environments and requirements. Continuous research and innovation contribute to advancing coal mining technology.


Material Information

Grades Density(g/cm³)±0.1 Hardness(HRA)±1.0 Cobalt(%)±0.5 TRS(MPa) Recommended Application
KD254 14.65 86.5 2500 Be suitable for tunnel excavation in soft rock layers and for mining coal seams containing coal gangue. Its main feature is good wear resistance and a long service life. This implies that it can maintain good performance in the face of abrasion and friction, making it suitable for handling soft rock and coal gangue materials.
KD205 14.7 86 2500 Used for coal mining and hard rock drilling. It's described as having excellent impact toughness and resistance to thermal fatigue. and can maintain strong performance when dealing with impacts and high temperatures, making it suitable for challenging environments like coal mines and hard rock formations.
KD128 14.8 86 2300 Possesses superior impact toughness and resistance to thermal fatigue, mainly applied in tunnel excavation and iron ore mining. while being able to withstand impacts and high temperatures.

Product Specification

Type Dimensions
Diameter (mm) Height (mm)
SMJ1621 16 21
SMJ1824 18 24
SMJ1925 19 25
SMJ2026 20 26
SMJ2127 21 27
Able to customize according to size and shape requirement
Type Dimensions
Diameter (mm) Height (mm) Cylinder Height (mm)
SM181022 18 10 22
SM201526 20 15 26
SM221437 22 14 37
SM302633 30 26 33
SM402253 40 22 53
Able to customize according to size and shape requirement
Type Dimensions
Diameter (mm) Height (mm)
SMJ1621MZ 16 21
SMJ1824MZ 18 24
SMJ1925MZ 19 25
SMJ2026MZ 20 26
SMJ2127MZ 21 27
Able to customize according to size and shape requirement

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