Overview of ZOKECRANE Crane Hook Assemblies
Manufactured by Henan Zoke Crane Co., Ltd., ZOKECRANE crane hooks are forged from high-quality alloy steel (such as DG20, DG20Mn, DG34CrMo, and 35CrMo) using advanced drop-forging and heat-treatment processes. Available in single hook, double hook (Ramshorn), and motorized rotating hook block configurations, our crane hooks conform strictly to DIN 15401, DIN 15402, and GB/T standards, supporting lifting capacities from 1 ton to over 500 tons for all types of industrial cranes.
Key Technical Specifications & Parameters
| Technical Parameter | Crane Hook Specification |
|---|---|
| Product Type | Forged Single Hook / Double Hook (Ramshorn) / Hook Block Assembly |
| Lifting Capacity (SWL) | 1 Ton to 500+ Tons (Custom engineered capacities available) |
| Manufacturing Material | High-tensile forged alloy steel: DG20, DG20Mn, DG34CrMo, 35CrMo, 42CrMo |
| Manufacturing Standard | DIN 15401 (Single Hook), DIN 15402 (Ramshorn), FEM, ISO, GB/T 10051 |
| Hook Strength Grade | M, P, S, T, V Grade (Matched to duty rating and environment) |
| Safety Latch & Bearings | Heavy-duty spring safety latch, heavy thrust roller bearings |
| Surface Treatment | Shot-blasted, anti-corrosion primer coating, bright safety yellow finish |
| Inspection & Testing | 100% UT/MT non-destructive testing, proof load test, 3.1 material certificate |
| Certifications | ISO 9001 Quality System, CE Certified, SGS Verified |
Core Product Advantages & Engineering Features
- High-Strength Precision Forging: Drop-forged from monolithic alloy steel without welds, eliminating internal defects and ensuring superior ductility and fatigue life.
- Integrated Safety Latch Mechanism: Spring-loaded safety latches prevent accidental disengagement of wire rope slings and rigging hardware during hoisting.
- Smooth 360-Degree Swivel Rotation: Premium heavy-duty thrust roller bearings allow effortless 360-degree hook rotation under full safe working load (SWL).
- Comprehensive Non-Destructive Testing (NDT): Every forged hook undergoes ultrasonic testing (UT) and magnetic particle inspection (MT) to ensure zero micro-cracks or internal flaws.
Industrial Applications of Crane Hooks
ZOKECRANE forged crane hooks and hook block assemblies are critical lifting components utilized across a wide variety of crane types and industrial applications worldwide:
1. Overhead & Gantry Cranes
Functions as the main hoisting hook group on single girder, double girder, and heavy container gantry cranes in workshops and storage yards.
2. Metallurgical & Foundry Cranes
Heat-resistant forged double hooks used with ladle beam hangers for lifting molten steel and iron ladles in steel mills.
3. Mobile & Port Cranes
Heavy-duty hook blocks designed for mobile harbor cranes, shipyard Goliath cranes, and offshore lifting machinery.
4. Mining, Construction & Heavy Rigging
Essential for handling heavy structural steel components, precast concrete segments, and heavy industrial machinery.
Frequently Asked Questions (Product FAQs)
What is the difference between a single hook and a double (Ramshorn) hook?
A Single Hook is ideal for lower to medium lifting capacities (up to 80–100 tons) where a single rigging line or shackle is used. A Double Hook (Ramshorn) features two symmetrical hooks, allowing load distribution across two separate slings, making it safer and more stable for heavy loads above 100 tons.
How do I determine when a crane hook must be discarded or replaced?
According to international crane safety standards, a hook must be removed from service if: the hook opening increases by more than 10% of nominal size, torsional twist exceeds 10 degrees, wear on the throat or saddle exceeds 10% of original dimensions, or if any surface cracks are detected via NDT testing.
What material grades are used for ZOKECRANE hooks?
We select materials based on duty class and ambient temperature. Common forged steels include DG20 (low-carbon steel for standard duty), DG20Mn/DG34CrMo (alloy steel for high-strength heavy duty), and 35CrMo/42CrMo for low-temperature or extreme metallurgical conditions.
Can ZOKECRANE supply motorized rotating hook blocks?
Yes. We manufacture electric motorized rotating hook assemblies equipped with electric slewing gearboxes, enabling operators to rotate heavy suspended loads remotely via wireless controller.
Export & Logistics FAQs for International Buyers
Which countries does ZOKECRANE export crane hooks and components to?
ZOKECRANE crane accessories are delivered globally, supplying equipment manufacturers and industrial facilities in Russia, Uzbekistan, the Philippines, Bangladesh, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Brazil, Nigeria, and many other international markets.
How are crane hooks packaged for international sea freight shipping?
All hook machined surfaces and threads receive rust-inhibitor grease and protective plastic wrapping. Hook bodies and complete hook blocks are vacuum-sealed in anti-corrosion film and packaged in heavy-duty export-standard fumigated wooden cases.
What quality control documents accompany ZOKECRANE crane hooks?
Every shipment is supplied with a comprehensive quality dossier, including ISO 9001 compliance, CE certificates, EN 10204 3.1 Material Test Reports (MTR), proof load test certificates, and NDT (UT/MT) inspection reports backed by SGS verification upon request.
What shipping terms and manufacturing lead times do you offer for hook orders?
We support standard international commercial terms including FOB, CIF, CFR, DDU, and DDP. For standard forged hook sizes, lead times range from 10 to 15 business days; custom or heavy-tonnage hook block assemblies take 20 to 30 business days.
Does ZOKECRANE offer custom hook dimensions according to old crane drawings?
Yes. Our engineering team can produce custom forged hooks, shanks, and hook blocks directly according to your CAD drawings, sample dimensions, or original OEM crane specifications.