What Is a Master Link?
A master link is the top fitting of a multi-leg sling, and it is the part that connects the whole assembly to the crane hook. It looks simple, but choosing the wrong one affects capacity and safety. This guide explains master links and how they differ from connecting links.
What Is a Master Link?
A master link is a large, welded or forged ring that joins the legs of a chain or wire rope sling to a single lifting point. The crane hook passes through the master link, and the sling legs hang from it.
Types of Master Links
- Single master link: one ring for a two-leg or three-leg sling.
- Quad master link: a larger assembly for four-leg slings.
- Master link assembly: a master link with intermediate links and shackles.
Master Link vs Connecting Link
A master link is a rated lifting component designed to take the full load of the sling. A connecting link is a smaller link used to join chain or fittings, and it is not always rated for overhead lifting. Do not substitute one for the other.
How to Choose a Master Link
- Match the WLL to the total sling load and the number of legs.
- Choose a size that fits the crane hook and the sling fittings.
- Use a rated master link assembly, not a hardware-store ring.
- Check the marking and certificate before use.
FAQ
What is a master link used for?
It connects the legs of a multi-leg sling to the crane hook as a single lifting point.
Can I use a connecting link as a master link?
No. A connecting link is not designed to carry the full sling load and may not be rated for lifting.
Related Reading
- Wire rope slings: types and how to choose
- Wire rope end fittings: clips, ferrules and thimbles
- What is a swivel? Types of swivels for rigging
Master Links and Connecting Links
SolidLink supplies master links and connecting links in forged and welded steel. Browse our master links or contact us for a quote.
