Swivel Crane Hooks

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Swivel crane hooks parameters

Load	1-200 tons (can be customized)	Classified according to ISO 4301 standard, dynamic load factor ≥1.25
Rotation angle	360° full circumferential rotation	Equipped with precision bearing system, rotation torque ≤5N·m (10-ton level)
Material	Alloy steel (42CrMo/35CrMo)	Surface treatment: hot-dip galvanizing/Dacromet coating (salt spray test ≥720h)
Safety factor	6:1 (working load limit)	Complies with DIN 15400 safety standard
Opening size	80-500mm (can be customized)	With self-locking tongue design
Own weight	15kg-2.3 tons	Lightweight structural design (15%-20% weight reduction year-on-year)
Applicable temperature	-40℃~+200℃	Special models available with high/low temperature resistant seals
Certification standards	CE/GS/API 8C	Includes third-party testing report (TUV/SGS)

Characteristics of swivel crane hooks

1. High-strength materials and lightweight design: The swivel crane hooks are made of 42CrMo/35CrMo alloy steel. After quenching and tempering heat treatment, the tensile strength reaches ≥1200MPa and the yield strength is ≥850MPa. It has both high toughness and fatigue resistance. Through topology optimization design and precision forging technology, the weight of the hook is reduced by 15%-20% compared with traditional hooks, which reduces the energy consumption of the crane load.
2. Crane rotation system: The composite configuration of double row angular contact ball bearings (carrying axial force) and crossed roller bearings (bearing radial force) reduces rotational resistance by 40%. Passes 100,000 rotations test (ISO 4309 standard) with no visible wear or performance degradation.

Key industry application scenarios

1. Swivel crane hooks for port: container handling, bulk carrier operations.
2. Swivel crane hooks for new energy: wind power tower hoisting and photovoltaic bracket installation.
3. Swivel crane hooks for smart manufacturing: automobile production line, industrial production.
4. Swivel crane hooks for emergency rescue: post-disaster reconstruction, special rescue.

In order to improve the safety protection capabilities of the swivel crane hooks, Weihua Group redesigned and developed key parts of the equipment and combined high-precision sensors to dynamically monitor the real-time load of the swivel crane hooks. Combined with the multiple protection monitoring system, the safety and reliability of the swivel crane hooks produced by Weihua is increased by 70% compared with ordinary hooks.

The multi-anti-decoupling mechanism of the wivel crane hooks independently developed by Weihua Group has functions such as mechanical lock tongue, electromagnetic braking, real-time monitoring, overload protection, and wear warning. The spring-driven self-locking tongue has an opening and closing force of ≥200N, ensuring that the hoisted object remains locked even when it is accidentally tilted. The electromagnetic lock is triggered at the moment of power outage, and the response time is <0.1 seconds to prevent slippage during power outage. The integrated infrared sensor monitors the closing status of the tongue in real time, and doubles the alarm through LED warning light and buzzer when abnormality occurs. The lifting load-type sensor can monitor the stress state of the hook in real time with an accuracy of ±1% FS, and the data is transmitted to the control room wirelessly. When the load exceeds 110% of the rated value, the lifting power is automatically cut off and emergency braking is initiated. A laser wear scale is set at the throat of the hook. When the wear amount is ≥10%, a system-level alarm will be triggered and maintenance will be forced out of service.