The GUDEN Continuous (Piano) Hinge Deep Dive

1. What is a Continuous Hinge?

A continuous hinge is typically described as a long hinge with a pin that goes the entire length of the leaves. For most people, a continuous hinge and a piano hinge are thought of as the same product. The term, “Piano Hinge” refers to one of the more iconic uses of the hinge - right on the cover of a piano.

Continuous hinges are available in a few different configurations.

  • The one that is most commonly seen is the standard continuous hinge without holes. It is used in an infinite number of industrial applications and is available in a wide selection of sizes. We stock from ½" to 6" open and from .025" to .250" thick leaves. This selection is available in a variety of materials - See below.
  • There are continuous hinges with holes pre-punched and these hinges are used mostly on wood cabinet applications. The holes are usually countersunk and the sizes range from 1.06" wide to 2" wide in .040" and .060" thick material. Most of these prepunched parts have a finish - brass or nickel plated steel.
  • Additionally there are Plastic Continuous Hinges. These are available in 3, 6 and 100 foot lengths and can be supplied to any other length. Available in a variety of colors, they are in stock from 1" to 3" wide.
  • There are Military Specification continuous hinges:
    • MS20001 series is available in a plain or anodized finish.
    • Commercial equivalent continuous hinges are available in a number of series including MS20257, MS35821 to MS35831 and A-A-55589 to A-A-55596.
  • A 5th type of continuous hinge is the extruded aluminum GEARED continuous hinge. This is a specialty item that is used extensively in high traffic doors on store fronts.

If your application will undergo excessive use and wear and tear, then a piano hinge is an excellent choice. It spreads the pressure created when the door is constantly opened and closed. It provides uniform strength along the door or panel’s length and creates a smooth and even pivoting action.

Some typical applications are:

  • Cabinet piano hinges
  • Electrical commercial-door piano hinges
  • Trailer-door piano hinges
  • Bifold-door piano hinges
  • Storm-door continuous hinges

Metal or Plastic?

Piano hinges come in different materials. The most common are:


Plastic piano hinges are excellent for long life and smooth and quiet operation. These hinges offer a flexible joint, unlike metal piano hinges and are made from one piece of plastic. They tend to be thicker hinges as a way of reinforcing strength.

Piano hinges come in different plastics, with polyolefin as a particular standout for its resistance to oil, salt, water, UV rays and solvents.


An aluminum piano hinge is used when you want a lightweight, yet strong and resilient hinge. Heavy-duty aluminum piano hinges are also common. Aluminum resists corrosion and rust, and costs less than the other metals. They’re also half the weight of brass and carbon steel options. The alloys used are typical 5052 and 3003.

Stainless steel

A stainless-steel piano hinge has excellent corrosion resistance, making them especially ideal for applications where salt spray is common.

A 304-grade stainless steel piano hinge offers durability and strength. 304 stainless steel is the most common grade used in continuous hinges. For superior corrosion resistance, we stock type 316 stainless steel.


A steel piano hinge, by the nature of the material, is for doors that endure constant use. The most common alloy used is 1010 to 1018 CRS. For additional corrosion resistance, many finishes are available.


A brass piano hinge is the most popular when aesthetics are involved, especially a solid brass piano hinge. They’re most commonly used on furniture and for architectural applications.

What Are the Benefits of Using Continuous Piano Hinges?

Piano hinges are a common part of modern sheet metal manufacturing.

  • Equal weight distribution
  • Easy maintenance
  • Durability
  • Security


Piano hinges are popular choices for metal cabinet projects these days. They are available in continuous form or smaller pieces depending on the location and category of use.

2. Here are some Blog posts we have published on the subject:

3. Here are some Guden YouTube Videos about Continuous Hinges:

4. Here is a link to the Category Page for Continuous or Piano Hinges.

Here you will find all of the products we offer.

5. Hinges Frequently Asked Questions - FAQs

Hinges FAQs