Weihua Electric Hoistフック

エレクトリックホイストフックはフックボディで構成されています, ロック, 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.

What types of electric hoist hooks are there?

• シングルフック (straight handle hook): 単純な構造, suitable for light loads.

• Double hook (S-shaped hook): symmetrical design, better balance, suitable for medium-sized loads.

• Swivel crane hooks: It can rotate 360° to reduce the torsion of the wire rope and is suitable for complex working conditions.

• Hook with safety lock: Equipped with a spring lock or latch to prevent unhooking (complying with safety standards).

Electric hoist hook parameters

Parameter category	Parameter description
Rated load	– Common range: 0.5 tons ~ 50 トン (needs to match the rated load of the electric hoist) – Safety factor: generally 4 に 6 times (for example, for a hook rated 1 トン, the ultimate breaking force needs to be 4 に 6 トン)
Materials and craftsmanship	– Material: Alloy steel (35CRMO, 20Mn2), stainless steel (304/316, used in corrosive environments) – Process: 鍛造 (high strength), rolling (economical)
Hook type	– Single hook (straight handle hook): light load (0.5~5 tons) – Double hook (S-shaped hook): medium load (5 に 20 トン) – Rotating hook: heavy load (10~50 tons)
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 (for example, 1 ton hook d≈20mm) – Total height (H): affects the working space (usually 200mm ~ 800mm)
Rotate function	– Rotation angle: 360° free rotation – Rotation speed: ≤2r/min (with ball bearings or sliding bearings)
Safety device	- Crane hook safety latch types: spring lock, latch lock, flip lock – Lock opening and closing force: ≤10N (to avoid accidental opening)
Environmental adaptability	– Temperature range: -20℃～+200℃ (high temperature requires special heat treatment) – Anti-corrosion grade: ordinary (carbon steel), IP65 (dustproof and waterproof), stainless steel (acid and alkali resistant)

Safety instructions for using electric hoist hooks

1. 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.

2. Daily inspection:

   • 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.

3. 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.

4. Environmental adaptability:

   • 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.

How to maintain hoist hook?

1. 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.

2. Anti-corrosion treatment:

   • In humid or corrosive environments, apply anti-rust oil or galvanize.

3. Regular testing:

   • Conduct magnetic particle inspection or ultrasonic inspection every 6 months to check for internal defects.

   • Check whether connecting parts (such as pins, nuts) are loose or deformed.

4. Replacement standards:

   • When cracks, permanent deformation, or the hook mouth expands by more than 15%, it must be replaced immediately.

   • The lock fails or the spring loses its elasticity and needs to be repaired or replaced.

よくある質問

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 (for example, 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 months.