Anchor, Bow, Chain, and D Shackles
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Lifting & Rigging Shackles
Shackles - including anchor shackles, chain shackles, and more - are a versatile tool for connecting lifting slings, wire rope, chain, and rope. They play an essential role in many rigging, lifting, pulling, and hoisting applications.
Because they come in a wide variety of styles and types, choosing the right one for the job can be confusing.
We've outlined some of the basics below (see our video or keep reading). If you have any questions, contact one of our product specialists for more information.
Lifting Shackle Types
While all rigging shackles act as connectors, factors like the sling type, the sling width, the environment, and your load can all influence which one will work best for your application. There are several main styles available to choose from:
Bow / Anchor Shackle
Bow or anchor shackles have a larger, rounded "O" shape look. Their rounded design allows them to take loads from many directions without developing significant side load.
They can also accommodate wider straps, offering added versatility.
The larger loop shape does have a downside, however. An anchor shackle has a lower working load limit than their chain-style counterparts.
Chain / D-Shackle
Chain shackles are also known as D-shackles due to their "D" shape design. It's narrower than the bow or anchor style and generally has a threaded pin or pin close.
The smaller loop is designed to take heavy loads primarily in line, as side and racking loads may cause the shackle D ring shape to twist or bend.
There are also Wide D and Long D versions available. The Wide D style has a wider mounting area for wide slings, while the Long D style has a taller loop. Both are made from stainless steel, making them perfect for high moisture or marine applications where corrosion is a concern.
Wide Body
The wide body shackle has an increased bow radius. It creates a wider sling-bearing surface and load distribution area, which can lengthen the working lifespan of your sling and eliminate the need for a thimble.
Sling Saver Shackle
These web sling shackles from Crosby also have a bow with an expanded radius - they increase the efficiency of the sling by at least 15%!
They are designed for use with synthetic slings.
Shackle Finishes: Galvanized vs. Stainless Steel
Galvanized metal and stainless steel both offer excellent protection from corrosion, making either a great choice.
In general, galvanized shackles are ideal for most industrial applications outside of marine. Galvanized steel is harder and has a coating of zinc oxide to protect from elements that lead to corrosion and oxidation. It also tends to be less expensive than stainless steel, but still maintains the product's strength and durability.
Stainless steel shackles are more corrosive-resistant and are therefore ideal for marine applications. Ours are made of type 316 stainless steel, which is considered "marine grade." It contains molybdenum, which is resistant to ocean water mist or spray, so it's especially useful in extreme moisture conditions or in a high chloride environment.
Type 316 stainless equipment is ideal for sailing and yacht rigging uses.
Pin Types
The pin that locks a metal shackle can be a deciding factor on which will work best for your job. We carry loose pins, captive pins, round pins, screw pins, and bolt type pins.
Screw Pin Shackles are popular because they offer a pin that is easy to connect and disconnect.
Round Pins use a removable cotter pin. This is a good option for applications where the pin may be subjected to torque or twisting, but not for situations where it will be subjected to an axial load.
Captive Pins offer a pin that cannot be removed from the bow of the shackle, something that's essential for marine applications. It keeps the pin from accidentally falling out and into the water.
Bolt Type Pins are the ideal choice for permanent or long-term applications. It also performs well if there's a risk of a load sliding on the pin, causing it to rotate.
Learn more about the difference between screw pin and bolt type on our blog.
Heavy-Duty Shackles by Brand
Our wide range of shackles includes both domestic and import options, all of which meet federal specifications. They are each embossed with working load limit information for easy and fast identification.
Crosby
As a leader in the industry, Crosby® takes no shortcuts when it comes to manufacturing a wide variety of high quality products to fit your needs. They offer benefits such as the highest design factor in the industry (6:1) on many shackles. Their commitment to exceeding performance requirements ensure strength and ductility properties are met.
Crosby® shackles are each load- and fatigue-rated, and use pins and bows that are quenched and tempered to enhance performance in cold temps and other adverse conditions.
Van Beest
Van Beest shackles are a high-quality, European-made rigging product that meets all industry standards. They are easy to spot because they have a signature green pin. Most offer a hot-dip galvanized finish and are made from either grade 6 or grade 8 steel.
Import
Our selection of import lifting shackles include a wide variety of types that are all made to meet federal specifications for rigging safety. They are great for those looking for a more economical choice.
Chicago Hardware
Chicago Hardware is a trusted domestic brand that offers shackles with screw pins, bolt type pins, round pins, and more. All of their shackles are made in the USA and have a hot galvanized finish.
Straightpoint
Straightpoint offers shackle load cells, which are ideal for applications with low headroom or involving super heavy lifts. Designed using industry-leading Crosby® brand rigging shackles, they allow for extreme accuracy while lifting.
Questions?
Not sure which heavy-duty shackle is right for you? Trying to decide between a screw pin anchor shackle and a bolt-type version? Call to speak to one of our product experts today - they can answer any questions you may have, as well as help you place an order.
We also carry a wide variety of other lifting and rigging equipment such as hammerlocks, nylon lifting slings, below-the-hook crane attachments, and more.