Heavy-Duty Traveling Block Hook for Overhead Cranes in Factory & Workshop Lifting

Technical Specifications

Application Fields

General Manufacturing Workshops: Heavy lifting of machinery components, raw materials, and finished products on overhead bridge cranes.

Steel & Metal Processing Plants: High-cycle lifting of steel coils, billets, plates, and fabricated structures where hook durability under continuous use is critical.

Automotive Assembly Lines: Precise load positioning for engine blocks, chassis components, and sub-assembly handling.

Warehouse & Logistics Centers: Bulk material handling and cargo transfer using overhead crane systems.

Heavy Equipment Fabrication Shops: Lifting large weldments, pressure vessels, and industrial machinery during assembly and maintenance.

Foundries & Forging Facilities: Extreme-duty lifting of castings, forgings, and high-temperature materials.

Shipbuilding Workshops: Plate handling, block assembly, and outfitting operations requiring large-capacity lifting hooks.

Why Choose SJ?

Sinopec-Backed Engineering Excellence

As a wholly-owned subsidiary of Sinopec Group—one of the world’s largest integrated energy companies—SJ Petroleum Machinery brings decades of heavy-lifting engineering expertise. With an enterprise credit rating of AAA and ISO 9001, HSE, API, GOST, and CE international certifications, SJ is recognized as a national-level green factory and ranks as one of China’s Top 500 manufacturers.

Rigorous API & ASME Compliance

SJ manufactures traveling block hooks in strict accordance with API Spec 8C (latest edition, PSL-2) and ASME B30.10 safety standards. Every hook receives API monogram certification, providing documented traceability and compliance verification. ASME B30.10 establishes comprehensive provisions for hook fabrication, attachment, use, inspection, and maintenance—all of which SJ fully follows.

Massive Production Capacity & Global Reach

With annual manufacturing capacity supporting over 100 drilling rigs and extensive lifting equipment components, SJ has supplied products to more than 10 countries worldwide and maintains a 50,000-square-meter assembly yard with heavy-load testing capabilities up to 750 tons.

OEM & Customization Services

SJ provides full OEM and ODM services, delivering custom-designed traveling block hooks matched to specific crane models, rated loads, and working class requirements (A3–A7). Whether replacing discontinued components or designing for unique workshop configurations, SJ’s engineering team works from your existing specifications to ensure perfect dimensional and load compatibility.

Comprehensive Quality Assurance

From material selection through final assembly, every SJ traveling block hook follows a documented quality control process: raw material certification → forging → heat treatment → machining → NDT inspection → load testing → final assembly → API monogram application. Each hook includes complete documentation of all test results and material certifications.

Frequently Asked Questions (FAQ)

Q1: What crane hook types does SJ manufacture for factory workshops?

SJ produces both single-hook and double-hook configurations. Single hooks are typically used for loads up to 50 tons, while double hooks provide better load stability for heavier capacities. All hooks are available with round shank or eye shank designs based on your crane block compatibility requirements.

Q2: Can you manufacture replacement hooks for discontinued or older crane models?

Absolutely. SJ specializes in OEM replacement manufacturing. Provide your crane’s manufacturer, model, and serial number along with any available dimensional drawings. Our engineering team will reverse-engineer the exact hook shank dimensions, thread specifications, and nut locking configurations to ensure perfect fitment.

Q3: What standards do your hooks comply with?

All SJ traveling block hooks are manufactured to API Spec 8C (PSL-2) and conform to ASME B30.10 safety standards for hook fabrication, inspection, and maintenance. We also comply with DIN 15400, FEM, and ISO 2415 as required per customer specification.

Q4: What is the standard lead time for a custom hook order?

Typical lead time for custom forged hooks ranges from 30 to 60 days depending on capacity rating and quantity. Standard catalog hooks from our finished inventory can ship within 15 days. Contact our sales team for current lead times on your specific requirement.

Q5: How do I determine the right hook capacity for my overhead crane?

The replacement hook must perfectly match your crane’s rated lifting capacity, working class, and operating environment. SJ recommends selecting a hook with a Working Load Limit (WLL) that meets or exceeds the crane’s maximum rated capacity—never use a hook with lower WLL than the crane’s rating. A 5:1 design safety factor is standard for all SJ hooks.

Q6: What inspection and retirement criteria apply to overhead crane hooks?

Per ASME B30.10, hooks must be removed from service if any of the following conditions are observed: deformation or bending of the hook body, throat opening increased by more than 15% of original size, torsional twist exceeding 10 degrees, visible cracks, or wear exceeding specified limits. SJ recommends documented inspections at least annually for general workshop environments and more frequently for high-cycle applications.

Q7: Can I visit your manufacturing facility in China?

Yes! SJ warmly welcomes plant visits to our headquarters in Jingzhou, Hubei Province, China. You can personally inspect our forging, heat treatment, machining, and assembly operations, as well as witness load testing of your hooks before shipment.

Q8: What post-sale support do you provide for overseas customers?

SJ offers comprehensive post-sale support including documentation packages (certificates, test reports, dimensional drawings), remote technical assistance, on-site commissioning guidance for large orders, and prompt supply of replacement parts through our global logistics network.