Hook: Shank Diameter 20-200 mm, Weight 2-200 kg

Component Specifications

Definition

A hook is a fundamental load-bearing component typically integrated into hook blocks, cranes, hoists, and lifting assemblies. It features a curved, open-ended design that allows for easy attachment and detachment of slings, chains, or other lifting accessories. Engineered to withstand specific load capacities, hooks are critical for safe and efficient material handling operations across various industrial sectors.

Working Principle

The hook operates on the principle of mechanical engagement and load distribution. Its curved shape creates a secure cradle for lifting attachments, while the load force is transferred through the hook's body to the supporting structure (e.g., hook block, crane). The design ensures that the load remains centered and stable during lifting, with safety latches often preventing accidental disengagement.

Materials

Typically forged or cast from high-strength alloy steel (e.g., AISI 4140, 4340) or carbon steel. May include heat treatment (quenching and tempering) for enhanced tensile strength and toughness. Corrosion-resistant coatings (galvanization, powder coating) or stainless steel variants are used in harsh environments.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	2-200 kg
Load Capacity	1-100 tons (varies by design)
Safety Factor	4:1 to 5:1 (typical)
Shank Diameter	20-200 mm
Throat Opening	50-500 mm
Working Load Limit (WLL)	As per manufacturer rating

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 2415, ISO 8539, DIN 15400, DIN 15401, ASME B30.10

Parent Products

This component is used in the following industrial products

Hook Block

A lifting component that houses the hook and connects it to the hoist mechanism.

View Product Details

Engineering Analysis

Risks & Mitigation

Overloading leading to deformation or fracture
Fatigue failure from cyclic loading
Accidental disengagement if safety latch is missing or faulty
Corrosion in humid or chemical environments
Improper attachment causing off-center loading

FMEA Triads

Trigger: Exceeding Working Load Limit (WLL)
Failure: Plastic deformation or catastrophic fracture
Mitigation: Implement load monitoring systems, use hooks with clearly marked WLL, and train operators on load limits.

Trigger: Fatigue from repeated loading cycles
Failure: Crack initiation and propagation, leading to breakage
Mitigation: Regular non-destructive testing (e.g., magnetic particle inspection), adhere to recommended service life, and replace hooks showing signs of fatigue.

Trigger: Missing or damaged safety latch
Failure: Load slippage and accidental disengagement
Mitigation: Mandatory use of self-closing safety latches, routine latch inspection, and immediate replacement of defective latches.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 2768-m, load testing to 125% of WLL as per ISO 8539

Test Method

Proof load testing, magnetic particle inspection, ultrasonic testing for internal defects, visual inspection for surface cracks and wear

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Hook

Manufacturer profiles associated with Hook.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a hook and a hook block?

A hook is the curved component that directly engages the load, while a hook block is an assembly that includes the hook, sheaves, and housing, designed for use with wire ropes in cranes and hoists.

How often should industrial hooks be inspected?

Hooks should undergo visual inspection before each use and formal documented inspection at least annually, or as per regulatory guidelines (e.g., OSHA, LOLER).

Can hooks be repaired if damaged?

No, hooks with cracks, deformation, or significant wear must be replaced immediately. Repair by welding or heating is generally prohibited as it can compromise material integrity.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Hook