Crane Hooks: Forged Single & Double Hooks

Looking for forged crane hooks from a reliable supplier? Hanko supplies open-die forged single and double hooks for your overhead, gantry, portal, and metallurgical cranes. This page covers the forging process behind what we supply, material options, testing standards, and ordering process.

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Hanko supplies forged crane hooks to DIN 15401 (single hooks, 0.5–80 t) and DIN 15402 (double hooks, 80–500+ t). Materials include DG20Mn for standard service and 34CrMo4 or 35CrMoA for heavy-duty applications. Material certificates (for example EN 10204 3.1), magnetic particle inspection reports, and proof load test certificates are available on request. Custom hooks are produced from drawings.

Crane Hook Manufacturing Process

1. Material Selection

2. Forging

When you order hooks, they are open-die forged from a single billet. The forging process:

• Heats the billet to 1150–1250°C
• Shapes the hook profile using hydraulic press and die tools
• Ensures grain flow follows the hook’s load-bearing contour
• Achieves a minimum reduction ratio of 3:1 from billet to forging

You must ensure that welding, casting, or repair welding on any load-bearing section of your crane hook is prohibited by all major standards. For more on hook types and their applications, see our guide to crane hook types.

3. Heat Treatment

Your heat treatment cycles are documented with temperature charts traceable to each heat number.

4. Machining

• Shank thread: Turned and milled to standard metric or UN thread profiles
• Thrust bearing seat: Machined to match the thrust bearing specification
• Hook saddle: Smooth finishing to prevent rope wear
• Pin hole: Bored to H7 tolerance for the hook pin

5. Inspection and Testing

Hook Types Available

Single Hooks (DIN 15401)

When you need single hooks, they are standard for your overhead and gantry cranes up to 80 t rated load. The single saddle design is simpler, lighter, and more economical.

• Load range: 0.5–80 t
• Shank diameters: 25–170 mm
• Throat openings: 36–200 mm
• Overall heights: 145–820 mm

For complete dimension data, see our crane hook size chart.

Double Hooks (DIN 15402)

When you need double hooks, they are standard for your heavy-duty cranes from 80 t to 500+ t. The two-saddle design distributes your load more evenly and provides better stability for heavy lifts.

• Load range: 80–500+ t
• Shank diameters: 165–330+ mm
• Throat openings: 190–380+ mm
• Overall heights: 750–1420+ mm

Special Hook Designs

• Laminated hooks: For foundry and high-temperature applications
• Clevis-type hooks: With integrated clevis for direct sling attachment
• Closed-eye hooks: For marine and offshore applications
• Pneumatic/hydraulic hook release: For grab crane applications

For selection guidance, see our crane hook selection guide. For hook failure analysis, see our articles on crane hook failures and common crane hook failures.

How to Order Custom Crane Hooks

Ready to order forged crane hooks? Send your rated load, standard reference, shank diameter, and throat opening to Hanko. Our engineers will confirm the forging method, material, and heat treatment, then provide a quotation within 24 hours.

FAQ

If you have hook drawings or specifications ready, send them to Hanko for a technical review and quotation. For our full hook product range, visit the Crane Hooks product page. Hanko serves customers in Russia, Central Asia, the Middle East, Southeast Asia, South America, and other markets with complete export documentation.