Shackles are devices used for connecting and securing objects, typically in heavy-duty applications. They come in various types, each designed for specific purposes and load capacities. Here are some common types of shackles:
1. Anchor Shackle (or D-Shackle)
Anchor shackles, also known as D-shackles, are one of the most common types of shackles. They have a U-shaped body with a threaded pin or bolt for secure attachment. Anchor shackles are used for connecting lifting slings, chains, or ropes to objects and have a high load capacity.
2. Bow Shackle
Bow shackles have a larger curved body compared to anchor shackles, resembling the shape of a bow. They are commonly used in applications requiring increased clearance or when attaching multiple slings or straps. Bow shackles offer better angular alignment and are preferred in situations where side loading may occur.
3. Screw Pin Shackle
Screw pin shackles have a removable pin or bolt that is threaded into the shackle body. They are easy to install and remove, making them versatile and commonly used in non-permanent applications. However, they are not recommended for critical or high-load applications due to the potential for the pin to unscrew under heavy loads.
4. Bolt-Type Shackle
Bolt-type shackles have a removable bolt that is secured with a nut and cotter pin or a locking mechanism. They provide a more secure and reliable connection compared to screw pin shackles. Bolt-type shackles are commonly used in applications where a more permanent and durable connection is required.
5. Chain Shackle
Chain shackles, as the name suggests, are specifically designed for use with chains. They have a wider body to accommodate the size and shape of chain links. Chain shackles are commonly used in industrial and marine applications where chains are the primary means of connection.
6. Twist Shackle
Twist shackles, also known as captive pin shackles or mousing shackles, have a removable pin that is secured by a twist lock mechanism or additional securing device. They provide added safety by preventing accidental unscrewing or dislodgment of the pin.
It’s important to select the appropriate type of shackle based on the specific application requirements, including load capacity, working conditions, and the type of connection needed. Ensuring the proper size, material, and design of the shackle is essential for safe and reliable operations.