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The durability of underhung cranes mainly depends on factors such as their design quality, manufacturing process and material selection. Generally speaking, high-quality underhung cranes have high durability and can maintain stable performance under long-term, high-intensity use conditions. Some key factors in evaluating the durability of underhung cranes are: structural design, manufacturing process, material selection, lubrication and maintenance.

1. Structural design: Whether the structural design of sevencrane underhung cranes is reasonable, whether it has been calculated for strength and stability, whether it uses appropriate materials, and whether the connection method is firm, will all affect its durability.
2. Manufacturing process: Whether the manufacturing process of underhung cranes is standardized, whether advanced welding, casting and processing techniques are used, and whether there is strict quality control during the manufacturing process will affect its durability.
3. Material selection: Whether the materials used in underhung cranes, such as steel, electrical components, etc., have sufficient strength, wear resistance and corrosion resistance, and whether they comply with relevant standards and specifications will also affect their durability.
4. Lubrication and maintenance: Whether industrial underhung cranes are regularly lubricated and maintained during use, and whether appropriate lubricants and maintenance materials are used, will have an important impact on their durability.

Overall, top manufacturers underhung cranes have high durability under normal use and maintenance. However, the actual durability of underhung cranes may vary due to differences in usage environments and working conditions, as well as factors such as operator level and quality of maintenance. Therefore, when selecting and using underhung cranes, comprehensive considerations should be made based on specific needs and conditions, products with reliable quality and good durability should be selected, and regular maintenance and care should be performed to ensure their long-term stable operation.