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Sea Link
640 Series Extra Heavy Oval Pattern Construction Blocks
Details the Extra Heavy Oval Pattern series (Series 640) designed for high-capacity construction tasks. Available in single, double, and triple sheave configurations for wire rope up to 1″, these blocks feature a 4:1 Design Factor and bronze-bushed sheaves (SAE64), with WLLs up to 70,000 lbs.
Sea Link Heavy-Duty Construction Solutions
The 640 Series Construction Blocks are engineered for high-capacity industrial lifting, featuring a specialized extra-heavy oval pattern steel shell. These blocks are designed to provide maximum structural integrity for heavy infrastructure and construction projects.
Engineering & Safety Standards
- Structural Safety Factor: Every block in the 640 series is manufactured to a strict 4:1 Design Factor.
- Precision Bearings: Sheaves are standard-fitted with bronze bushings manufactured to SAE64 specifications for durable performance under extreme loads..
- Forged Hardware: All structural accessories and fittings are forged to ensure reliability and high fatigue resistance
- Customization: While standard models are provided, custom-engineered models are available upon request to meet unique site requirements.
Capacity and Sizing Selection
The 640 series accommodates wire rope diameters ranging from 5/8″ to 1″ and offers Working Load Limits (WLL) up to 70,000 lbs.