Power Sling® Shackle – Engineered for Extreme Lifts

When lifting operations become more demanding, every component in the rigging system starts to matter – not only the crane or the sling, but the shackle design as well. The Green Pin® Power Sling® Shackle is engineered specifically for extreme loads and challenging conditions, making it a key component for offshore and heavy lifting applications where safety, efficiency, and repeatability are critical.

With Green Pin® products available through Daubner Industrial, you can build lifting systems that meet stringent industrial requirements and support safe, productive operations.

What Makes the Power Sling® Shackle Different?

The Power Sling® Shackle was developed from the insight that traditional shackle designs do not always make optimal use of crane and sling capacity. Its geometry and cross-section are designed to:

• Provide higher Working Load Limit (WLL) for a given size
• Improve load distribution in multi-leg chain or wire rope slings
• Simplify handling and positioning in tight or hard-to-access locations

This optimized shape helps control the center of gravity and load direction, reducing the risk of unintended side loading – one of the most common causes of rigging failures. When correctly selected, a Power Sling® Shackle allows the entire lifting system to operate closer to its optimal, yet still safe, working range without unnecessary over-dimensioning.

How the Webinar Helps You Choose the Right Products

The Green Pin® Power Sling® Shackle webinar is designed to move you beyond “choosing by picture” and toward scenario-based product selection. During the session, Green Pin® experts will cover three main areas:

• The engineering story behind the Power Sling® Shackle
  – Why the shape looks the way it does, how the load path runs through the body, and which design safety factors the engineers built in.
• An overview of the complete Power Sling® range
  – Available sizes, WLL ranges, and typical applications such as offshore construction, heavy transport, and other critical lifts.
• Best practices for safe and effective use
  – Sling angles, multi-leg sling configurations, connection points, visual checks, and common mistakes to avoid in the field.

The webinar concludes with a live Q&A session where you can ask Green Pin® specialists about specific lifting scenarios, product combinations, or standards. This is particularly valuable for teams that do not work with extreme-load shackles every day but are preparing for offshore or heavy lifting projects where errors are costly.

Why Shackle Design Matters in Real Operations

A well-chosen shackle does much more than “connect two components.” In practice, the right design:

• Reduces unwanted stress concentrations in slings and hardware
• Helps keep the load properly centered and under control
• Speeds up assembly and disassembly, especially in harsh conditions
• Allows the crane, sling, and hardware to work together as a balanced system

In offshore and heavy lifting environments, these factors directly influence project costs, downtime, and safety performance. The Power Sling® Shackle is a response to these real-world demands, offering a design that supports both safety and efficiency.

Green Pin® Aquaculture – Reliable Below the Surface

In aquaculture, reliability is everything. Equipment is exposed constantly to water, salt, movement, and changing temperatures. In this environment, it is not enough for components to be strong on paper – they also need long-term corrosion resistance and excellent fatigue performance.

The Green Pin® Aquaculture range is specifically designed for these demanding conditions. The range includes:

• Three types of shackles
• A mooring T-bolt
• A Master Link

All of these components are extensively fatigue-tested and DNV type approved according to NS 9415 (NYTEK). High-quality galvanization and carefully selected materials ensure that mooring systems remain secure and stable over time, with reduced maintenance demands.

Green Pin® Mooring Bow Shackle NS9415 BN – Safety and Handling in One

The Green Pin® Mooring Bow Shackle NS9415 BN is a high-quality bow shackle developed for mooring applications. It features a safety bolt and a sunken bolt head for secure and reliable performance, tailored to the realities of aquaculture and mooring operations.

Key characteristics include:

• Double safety
  – The safety bolt and synthetic cotter pin work together to prevent accidental loosening, even under vibration and dynamic loading.
• Sunken bolt head
  – The recessed head reduces the chance of unwanted rotation and self-loosening, while making assembly easier in areas with limited space.
• Reduced risk of damage
  – The shackle shape helps minimize abrasion and damage to cage nets or mooring lines.
• Wider shackle mouth
  – The wider opening allows easy connection to wider mooring plates or connecting plates commonly used in aquaculture systems.

The result is a shackle that is safe, easy to handle, and optimized specifically for mooring duty in harsh marine environments.

Green Pin® Dee Shackle NS9415 FP – Outstanding Fatigue and Safety Margin

The Green Pin® Dee Shackle NS9415 FP is a premium dee shackle with a square, sunken hole screw pin (flush pin), designed for maximum safety and ease of assembly in mooring systems.

Its main features include:

• Square screw pin with safety plug
  – This combination provides double safety and allows quick, controlled assembly and disassembly using the Green Pin® Sunken Hole Key.
• Hot-dip galvanizing
  – The shackle is hot-dip galvanized to meet NS 9415 requirements, providing long-term corrosion resistance in aggressive marine environments.
• Fatigue performance
  – A 40,000-cycle fatigue rating demonstrates that the shackle is designed to handle repeated loading over time without compromising integrity.
• High safety factor
  – The Minimum Breaking Load (MBL) is seven times the WLL, providing an industry-leading safety margin for critical mooring applications.

This type of shackle is not just compliant on paper; it actively contributes to long-term mooring system integrity, lower lifecycle costs, and safer operation.

When to Choose Which Green Pin® Solution

• Offshore and heavy lifting projects:
  – Power Sling® Shackle – for applications where extreme load capacity, optimized geometry, and high safety margins are essential.
• Aquaculture and permanent underwater systems:
  – Green Pin® Mooring Bow Shackle NS9415 BN – for securing mooring points, cage systems, and anchor connections with enhanced safety and easier handling.
  – Green Pin® Dee Shackle NS9415 FP – where superior fatigue resistance and an exceptional safety factor are required over long service lives.

Choosing the right product is never just a matter of reading a WLL table. You should always consider the operating environment (offshore, aquaculture, onshore), the nature of the loads (static vs dynamic), the expected service life, and applicable standards (such as NS 9415, DNV approvals, and local regulations).

Discover Green Pin® shackles and other lifting hardware in our catalog and select the components that match your next project’s requirements on the Daubner Industrial Rigging & Lifting page: Daubner Industrial Rigging & Lifting Catalog.