Butt hinges are a type of hinge with rectangular parts that fasten to two separate, parallel parts that close on each other, thus connecting them and allowing for swinging movement up to 180 degrees. One of the two most common types of recessed, or mortised, hinges, butt hinges do not necessary have to be mortised and can be surface-mounted as well.
Compared to any other hinge, the butt hinge is by far the simplest in design, most affordable, and used most often for hinge applications. Butt hinges are always in constant use as they are typically used to hang and swing doors, cabinets, gates, trunks, chests, and other common items that open and close. The hinge is made up of two leaves that are attached to two adjoining parallel parts. The leaves are bent together at their edges to create knuckles in which a pin is inserted into to secure the two leaves together allowing for movement to take place. This pin can either be loose or fixed depending on the application. A loose pin allows the two pieces to be separated without removing the hinge from the object. These are commonly used on interior doors of a home for easy removal and reattachment. Fixed pins are secure and will not come out as their name suggests. Gates and garage doors are common places for this type of hinge to be found as they are more permanent fixtures that are not often tampered with.
Butt hinges are made out of various materials including brass, copper, stainless steel, bronze, titanium and more. They can be used indoors and outdoors, however when using them outdoors a corrosion and rust resistant material should be chosen to lengthen the life of the hinge. Hinges can also be decorative and match any other hardware that is mounted on a particular piece. A variety of lengths and thickness are available to get the right combination of strength and durability for any application. Manufacturers typically create these hinges with pre-drilled screw patterns to accommodate fasteners easily for quick placement. These hinges can create up to 180 degrees of movement between the parts they connect.
As the premier type of hinge used in furniture applications, butt hinges are used to mount interior and exterior doors, cabinets and more in residential, construction, commercial, public, architectural, military, marine and other industrial contexts. When used for commercial and residential furniture applications, butt hinges are typically constructed from steel, though butt hinges for exterior doors may also be made of brass or stainless steel for high corrosion resistance. For residential cabinetry, butt hinges can be made of more aesthetically-pleasing materials such as satin nickel, antique brass, polished nickel and satin brass. For industrial applications, heavy duty butt hinges are required and are most often constructed from materials such as steel, stainless steel and brass. Aluminum butt hinges are mainly used for light-weight applications.
Butt hinges consist of two metal leaves that are bent at their edges into barrels. The barrels are known as knuckles, and a pin is inserted into the barrels and runs along the entire length of the hinge. One leaf of the hinge is connected to an object such as the door while the other leaf is connected to, and recessed into as well, the parallel part that needs to be connected such as a jamb or door frame. There are two main types of pins that are used in butt hinges: fixed-pin and loose-pin. Fixed-pin butt hinges are rigid and the pin cannot be removed from the butt hinge. Loose-joint butt hinges allow the pin to be easily removed from the butt hinge by tapping it with a screwdriver. Loose-joint butt hinges have an advantage over fixed-pin butt hinges in that doors can be removed without having to unscrew the hinges. Besides the common butt hinge, there is one other type of butt hinge that is commonly used, known as a rising-butt hinge. Rising-butt hinges are self-closing and are used on doors in areas where there is a discrepancy between the height of the flooring, such as a cement floor and a carpeted floor. When the door is opened, the rising-butt hinge causes the door to rise high enough that it clears the higher flooring. Materials for butt hinges are typically extruded for additional tensile strength and then drilled and cut to shape.
Butt Hinges - S & D Products, Inc.
Butt Hinges - Marlboro Manufacturing, Inc