Excavator Insights: The World of Bucket Teeth

The excavator bucket teeth of an excavator play a crucial role in its operation.

Excavator Bucket Tooth

Common bucket teeth on the market are classified by their application range:

1. Earth-moving teeth (used for excavating soil, sand, gravel, and other light-duty environments) Generally, earth-moving teeth are used with buckets that have a large mouth area. They have a larger stacking surface, thus offering a higher fill factor, saving operational time and increasing efficiency.

2. Rock teeth (used for ore and stone mines) are used after blasting for loading ore, suited for heavy-duty operations with wear-resistant steel, providing better excavation performance and more pronounced cost-effectiveness.

3. Cone-shaped teeth (used for coal mining and geological mining) are mainly suitable for drilling layers of rock with low hardness and high impact force.

Bucket teeth installation

Common installation methods include vertical and horizontal bucket teeth. Direct installation refers to the pin axis being vertically installed at the front end of the excavator tooth, while horizontal installation means the pin axis is parallel to the front end of the excavator tooth.

Vertical bucket teeth:
They are easy to disassemble. They can be directly smashed from above, offering a large operating space. During excavation, the pins of directly installed teeth can be squeezed by the excavated material. If the excavation force is large and the clamping force of the expansion spring cannot meet the requirements, it may lead to the loss of tooth pins. Therefore, although this structure is convenient for disassembly, it is generally used on small excavators or those with low tonnage.

Horizontal bucket teeth:
They are not very convenient to disassemble, with limited side operation space, making it difficult to apply force. To remove a single bucket tooth, special long-bar tools must be used sequentially. During excavation, the front surface of the horizontally installed tooth pin is not squeezed by the excavated material, allowing it to withstand greater excavation forces. However, the expansion spring can wear out and fail due to the reciprocating lateral force during use, leading to the loss of the tooth pin. This is generally more common in excavators with a digging force greater than 20 tons.

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