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An Introduction to Excavator Bucket Teeth
Updated at:
2026-03-12 09:40
As a critical wear part for excavators, the bucket tooth is akin to a human tooth: it’s a composite assembly consisting of a tooth base and a tooth tip, which are joined by a pin. Today, we’ll be discussing this essential component!
During operation, the bucket teeth of an open-pit excavator often fail prematurely due to severe wear. Stress analysis reveals that the working face of the bucket tooth is in contact with the material being excavated, and the stress conditions vary across the different stages of a complete digging cycle. The tip of the tooth first contacts the material surface; owing to its high velocity, the tooth tip experiences intense impact. If the yield strength of the bucket tooth is low, plastic deformation will occur at the tip.
As the excavation depth increases, the stress conditions on the bucket teeth change. When the bucket teeth cut into the material, relative motion occurs between the teeth and the material, generating substantial normal extrusion pressure on the contact surface and, consequently, significant frictional forces at the interface. For harder materials such as rock blocks or concrete, these frictional forces can be particularly high. Repeated cycling of this process leads to varying degrees of surface wear on the working face of the bucket teeth, eventually resulting in deep plow-like grooves. The composition of the bucket teeth directly affects their service life; therefore, selecting the appropriate bucket teeth requires careful consideration. Notably, the normal pressure on the front working face is markedly greater than that on the rear working face, and the front face experiences more severe wear. This indicates that normal pressure and friction are the primary external mechanical factors contributing to bucket-teeth failure and play a dominant role in the failure mechanism.
Therefore, it is essential to regularly monitor the condition of the excavator bucket teeth during operation to prevent malfunctions that could reduce work efficiency.
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