Pear-Shaped Links – Specialized Connectors for Rigging Applications
Pear-shaped links, while less prevalent than oblong master links, offer unique advantages in specific rigging scenarios. They are particularly favored in wire rope and synthetic sling assemblies due to their distinctive shape, which facilitates efficient load distribution. However, they are generally not used with chain slings because they often do not meet the necessary grade requirements, such as Grade 100, essential for chain sling applications.
Key Benefits of Pear-Shaped Links:
- Narrow Top and Wider Bottom Design: The tapered top helps center hooks or shackles, while the broader base allows sling legs to spread naturally, promoting balanced load distribution.
- Compact Profile: Their shape can be advantageous in tight rigging setups where space is limited.
Popular Models:
- Crosby G-341 – Carbon Steel, Galvanized Finish
- Material: Carbon steel
- Finish: Hot-dip galvanized for enhanced corrosion resistance
- Working Load Limit (WLL): 1,800 to 20,500 lbs
- Safety Factor: 6:1
- Applications: Ideal for wire rope and synthetic slings where corrosion resistance is crucial
- Crosby A-341 – Alloy Steel, Gold Painted
- Material: Alloy steel
- Finish: Gold paint for easy identification
- Working Load Limit (WLL): 7,000 to 373,000 lbs
- Safety Factor: 5:1
- Applications: Suited for heavy-duty wire rope and synthetic sling applications requiring higher load capacities
Considerations:
While pear-shaped links can be used in similar applications as oblong master links, their design may not be optimal for multiple branch slings and, in some cases, may interfere with the crane hook.
In summary, pear-shaped links provide a specialized solution in rigging, particularly beneficial for wire rope and synthetic sling assemblies. Their unique shape aids in centering connections and facilitating natural sling leg positioning, making them a valuable component in specific lifting applications.
