In excavator operation, the bucket pin, as an important pivotal part connecting the boom, linkage and bucket, is subjected to tremendous impact force and torque. Bucket pin size, structural design and durability requirements are are different for different tonnages of excavators, and resonable selection is essential to extend equipment life and improve construction efficiency.
1. 5~8 tons mini excavator: flexibility priority, high precision requirement
These models are mainly used in construction scenes with limited space, such as city roads and landscaping, with frequent movements, requiring high rotational accuracy and wear resistance of the bucket shaft.Recommended use of tempered + nitriding treatment of medium carbon alloy steel bucket shaft, the diameter is generally between 45 ~ 60mm, light weight, fast response.
2. 13~20 tons of medium-sized excavators: strength and impact resistance are both important
This type of equipment is commonly used in infrastructure, housing and municipal projects, with high operational intensity.Bucket shafts need to have higher tensile and shear resistance, generally using 40Cr or 42CrMo materials, the surface of high-frequency quenching treatment.Diameter is 65~80mm, need to be used with thickened bushing.
3. Large excavators over 30 tons: the durable choice for extreme loads
Large excavators are mostly used in mines, quarries and other heavy-duty working conditions, the bucket shaft should not only be resistant to impact, but also to twisting and fatigue.It is often made of high-strength alloy steel, which is forged as a whole and quenched by medium frequency quenching and tempering.The diameter is usually more than 100mm, and the weight can be tens of kilograms.
·Selection Tips:
- Please make sure the tolerance between the diameter of the bucket shaft and the seat hole is within ±0.02mm.
- Pay attention to the material and lubrication of the sleeve to avoid dry friction.
- High-temperature operating environment, it is recommended to use heat-resistant hardened material bucket shaft.
(Correct selection can not only improve the construction efficiency of the whole machine, but also extend the service life of other structural components (such as moving arm, bucket) and reduce the breakdown rate.)
We offer a wide range of bucket shafts, support customized sizes and brand fit, welcome to contact us for selection advice and technical support.
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Post time: Jun-23-2025