Which Shackle Should You Be Using?

Summary

In this video, Ben from The Lifting & Rigging Channel explains the different types of shackles, their shapes, pin types, and material compositions to help users choose the right shackle for various lifting and rigging applications. He covers anchor and chain shackles, screw pin, round pin, and bolt types, highlighting when and how each should be used. The video also explores specialty shackles like synthetic sling and long reach shackles, along with considerations for materials like carbon steel, alloy steel, and stainless steel. The goal is to ensure safety and efficiency when selecting shackles for lifting tasks.

Takeaways

• 😀 Shackles are essential rigging hardware used for securing loads and come in different types and configurations.
• 😀 The working load limit (WLL) is the most important factor to consider when using shackles to ensure safety.
• 😀 Shackles are made of various materials, including carbon steel, alloy steel, galvanized steel, and stainless steel, each with specific properties and applications.
• 😀 The shape of a shackle’s bow (anchor or chain) determines its best use, with anchor shackles being good for side-loading and multi-leg connections.
• 😀 Chain shackles, also known as D-shackles, are designed for in-line tension only and should not be side-loaded as it can damage the shackle.
• 😀 Shackles can come with three different pin types: screw pin, round pin, and bolt type, each with advantages for specific applications.
• 😀 Screw pin shackles are quick to connect and disconnect but require tightening before each lift to prevent loosening during use.
• 😀 Round pin shackles are secure with a cotter pin but are not recommended for overhead lifting or side-loading.
• 😀 Bolt-type shackles provide the most secure connection and are ideal for long-term installations and applications where twisting may occur.
• 😀 Specialty shackles, like synthetic sling shackles and wide body shackles, are designed for specific tasks and help improve load security, sling service life, and compatibility.

Q & A

What is the most important part of a shackle to consider when choosing one for a load?

The most important part of a shackle to consider is the Working Load Limit (WLL), which indicates the maximum weight the shackle can safely lift. It's crucial to ensure that the load never exceeds this limit.

What are the key parts of a shackle?

A shackle consists of the bow (or body), ears, pin, and shoulder of the pin. These components work together to secure the load safely.

What does the marking 'WLL' on a shackle indicate?

'WLL' stands for Working Load Limit, which indicates the maximum load the shackle can safely lift. This is a critical piece of information to ensure safe rigging practices.

What is the difference between an anchor shackle and a chain shackle?

An anchor shackle has a larger, round O-shape and is suitable for side loading or multi-leg sling connections. A chain shackle is D-shaped, narrower, and designed for in-line tension only, meaning it should not be side loaded.

What is the main drawback of using a screw pin shackle?

A screw pin shackle is not recommended for long-term installations because the pin can loosen or unthread over time, especially when using a choker hitch. It's best for pick-and-place applications where hardware is frequently changed.

When is a round pin shackle ideal for use?

A round pin shackle is ideal for applications where the pin may twist or be subjected to torque, such as in tie-down, towing, or suspension systems. However, it's not recommended for overhead lifting or side loading.

Why are bolt-type shackles considered more secure than other types?

Bolt-type shackles are more secure because they use a bolt and nut system, which remains tight even under twisting or torque. They are ideal for semi-permanent or long-term installations, eliminating the need for frequent tightening.

What type of shackle should you use for a multi-leg sling assembly with significant torque?

For a multi-leg sling assembly with significant torque, you should use a bolt-type anchor shackle. This combination ensures both strength and security during the lift, especially when working with higher torque loads.

What is the purpose of a synthetic sling shackle?

A synthetic sling shackle has a wider bow that allows synthetic slings, such as web or round slings, to lay flat. This enables the sling to utilize 100% of its weight load limit, optimizing safety and efficiency.

How do alloy steel shackles compare to carbon steel shackles?

Alloy steel shackles are stronger than carbon steel shackles, allowing for a smaller shackle to achieve the same weight load limit. They are ideal for applications where strength and weight savings are important.