What Are Bi-Fold Hinges?

Bi-fold hinge by Monroe Engineering

Hinges come in many different types. Standard hinges consist of two leafs, a knuckle and a pin. Like all hinges, they allow for a limited angle of rotation with the surfaces on which they are installed. There are other types of hinges available, though, including bi-fold hinges. Bi-fold hinges still allow for a limited angle or rotation, but they feature an entirely different design than their standard counterparts. What are bi-fold hinges exactly?

Overview of Bi-Fold Hinges

A bi-fold hinge is a mechanical bearing that allows the surfaces on which they are installed to swing open in both directions. Standard hinges, of course, only allow surfaces to swing open in a single direction. If installed on a door, for instance, you might be be able to open the door by pulling or pushing it — but you won’t be able to open the door using both methods. Bi-fold hinges solve this problem by allowing the door or other surfaces to swing open in both directions.

How Bi-Fold Hinges Work

Unless you’re familiar with them, you might be wondering how bi-fold hinges work. They are able to provide multi-directional rotation thanks to their design. All bi-fold hinges feature three leafs. This is in stark contrast to standard hinges, which only feature two hinges. With three leafs, bi-fold hinges aren’t restricted to any single direction. Rather, they can swing open in both directions.

Bi-fold hinges contain three leafs, two knuckles and two pins. The two outermost leafs are installed on the surfaces, whereas the middle leaf provides the multi-directional rotation.

Benefits of Bi-Fold Hinges

Bi-fold hinges are undoubtedly convenient. Since they offer multi-directional rotation, they provide a superior level of convenience when compared to standard hinges. You can install them on doors, panels or other surfaces. Once installed, you’ll be able to open the surfaces in both directions. Standard hinges are more restrictive since they can only swing open in a single direction.

Bi-fold hinges are easy to install. They require the same method of installation as standard hinges. Most bi-fold hinges feature holes for fasteners. You can drive a fastener through a hole and into the door or surface.

You can find bi-fold hinges made of a variety of materials. If you’re planning to use them in a humid environment, you may want to choose stainless steel bi-fold hinges. With a stainless steel construction, you won’t have to worry about your bi-fold hinges rusting. Stainless steel is naturally protected against corrosion thanks to its chromium content.