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The electric hoist hook is a key component in lifting equipment and is responsible for directly suspending and carrying heavy objects. The electric hoist hook is a hook device developed by Weihua Group for small and medium-sized lifting equipment. It can handle goods ranging from 0.5 toneladas de 50 montones.
El gancho del polipasto eléctrico consta de un cuerpo de gancho., un candado, a bearing or rotating mechanism, and a hook nut/pin. The hook body structure of the Weihua electric hoist hook is forged or rolled from high-strength alloy steel, which has high toughness and fatigue resistance.
Gancho soltero (straight handle hook): estructura simple, suitable for light loads.
Gancho doble (Gancho en forma de S): symmetrical design, better balance, suitable for medium-sized loads.
Hook with safety lock: Equipped with a spring lock or latch to prevent unhooking (complying with safety standards).
| Parameter category | Descripción del parámetro |
| Carga nominal | – Common range: 0.5 tons ~ 50 montones (needs to match the rated load of the electric hoist) – Safety factor: generally 4 a 6 veces (Por ejemplo, for a hook rated 1 tonelada, the ultimate breaking force needs to be 4 a 6 montones) |
| Materiales y artesanía | – Material: Acero aleado (35CRMO, 20mn2), acero inoxidable (304/316, used in corrosive environments) – Process: forja (high strength), rolling (economical) |
| Tipo de gancho | – Single hook (straight handle hook): light load (0.5~5 tons) – Double hook (Gancho en forma de S): medium load (5 a 20 montones) – Rotating hook: heavy load (10~ 50 toneladas) |
| Critical dimensions | – Hook mouth width (D): determines the size of the spreader that can be hung (such as 20mm ~ 200mm) – Hook body diameter (d): Positively related to load (Por ejemplo, 1 ton hook d≈20mm) – Total height (H): affects the working space (usually 200mm ~ 800mm) |
| Función de rotación | – Rotation angle: 360° Rotación libre – Rotation speed: ≤2r/min (with ball bearings or sliding bearings) |
| Safety device | - Crane hook safety latch tipos: spring lock, latch lock, flip lock – Lock opening and closing force: ≤10N (to avoid accidental opening) |
| Adaptabilidad ambiental | – Temperature range: -20℃～+200℃ (high temperature requires special heat treatment) – Anti-corrosion grade: ordinary (carbon steel), IP65 (a prueba de polvo y resistente al agua), acero inoxidable (acid and alkali resistant) |
Load limit:
Overloading is strictly prohibited and the load must not exceed the rated lifting capacity marked on the hook.
Avoid impact loads and lift slowly and steadily.
Inspección diaria:
Cracks or deformation: Check the hook body and lock buckle for cracks, bends or wear before use.
Degree of wear: If the wear of the hook tip exceeds 10% of the original size, it needs to be replaced.
Rotational flexibility: The rotating hook should ensure smooth rotation without jamming.
Correct hanging:
The center of gravity of the load should be located at the center of the hook. It is prohibited to pull diagonally, pull sideways or tie it loosely.
When using a sling/rope, make sure it is fully embedded in the bottom of the hook to avoid getting caught on the hook tip.
Adaptabilidad ambiental:
High temperature and corrosive environments require the use of special materials (such as stainless steel hooks).
Avoid use near live lines to prevent risk of electric shock.
Cleaning and Lubrication:
Clean dust and oil regularly to prevent impurities from exacerbating wear and tear.
The rotating parts need to be filled with high temperature resistant grease to maintain flexibility.
Tratamiento anticorrosión:
In humid or corrosive environments, apply anti-rust oil or galvanize.
Regular testing:
Conduct magnetic particle inspection or ultrasonic inspection every 6 months to check for internal defects.
Check whether connecting parts (such as pins, nueces) are loose or deformed.
Replacement standards:
When cracks, permanent deformation, or the hook mouth expands by more than 15%, debe reemplazarse inmediatamente.
The lock fails or the spring loses its elasticity and needs to be repaired or replaced.
Q: The hook is not flexible in rotation.
A: Check whether the bearing is short of oil or foreign matter has entered, and lubricate it after cleaning.
Q: Lock cannot be closed.
A: Check whether the spring is damaged or the locking mechanism is deformed.
Q: Rust on hook body surface.
A: Mild rust can be polished with sandpaper and then coated with anti-rust oil; severe rust requires replacement.
Q: How to understand the “safety factor 4 times” of the hook?
A: The breaking strength of the hook needs to be more than 4 times the rated load (Por ejemplo, a 1-ton hook needs to withstand 4 tons of pulling force without damage).
Q: How to judge whether the hook needs to be replaced?
A: Deformation of the hook mouth leads to an increase in width of ≥15%;
Surface crack depth ≥1mm;
The hook tip wear exceeds 10% of the original thickness.
Q: How long is the bearing life of a swivel hook?
A: It lasts about 5,000 hours under normal working conditions and requires lubrication and maintenance every 3 meses.
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