The standard butt hinge is the most recommended form of hinges, is one typically used for doors and composed of two same leaf. Its advantages are simple installation, high bearing capacity, and clear quality standards. It is one of the preferred hinges for most customers.
Hinges are one of the most popular categories of mechanical bearings. A butt hinge is a special type of hinge that has a rectangular part that is fixed to two different parallel parts that are close to each other, connecting them and allowing up to one hundred eighty (180) degrees of oscillating motion. Like all hinges, butt hinges consist of a joint, a pin, and two leaves.
The material of the butt hinge
Hinges for interior doors
Interior door hinges can be made of stainless steel, copper, zinc alloy and other materials. Stainless steel resists corrosion and rust and is the best choice for fire doors. Copper and zinc alloys are easy to process, have good fluidity, are easy to cast, and are cheap. The disadvantage is that the strength is not as good as SUS304.
Hinges for exterior doors
External doors usually use hinges made of SUS304. The butt hinge of the exterior door is exposed to the external environment (salt and water), so it is easily corroded and the hinge is damaged. Hinges made of SUS304 have high strength and excellent corrosion resistance, and can be used in seaside environments. In addition, the melting point of SUS304 is higher than that of the flame, and the fire resistance time is usually as high as 2-4 hours, which is chosen by many fire doors.
The components of the butt hinge
For a butt hinge, the parts including:
- Pin
- Rod
- Hinge leaf
- Ball bearing
- Hinge leaf
Types of hinges
While butt hinges are most commonly used as standard door hinges, there are some types of butt hinges that have special features and functions.
Butt hinge
Used for interior door and fire-rated door, made according BS EN1935 standard.
Security hinge
Used for exterior, entrance, and out-opening doors, high level security hinge.
Flush hinge
Used for interior door, wooden and aluminum door, instal without cutting hole.
Flag hinge
Used for interior door, the door leaf and frame part can be installed separately and assembled on site easily.
Lift off hinge
Used for public bathroom door, can keep the door keep open or close.
Soft-closing hinge
Used for interior door, keep door keep closing, with soft closing function.
Spring hinge
Used for interior door, keep door keep closing, without soft closing function.
Heavy-duty hinge
Used for wooden door and steel door, load capacity up to 160KG/Pair, without oil inside.
Heavy-duty adjustable hinge
Used for heavy steel door, load capacity 160KG/Pair, door position adjustable after installed.
Questions to consider when choosing a butt hinge?
BS EN 1935 is the test standard used to assess the performance and efficacy of each hinge. Hinge manufacturers must adhere to a strict set of standards and guidelines to ensure that their hinges meet the requirements set out in the standards.
Bearing capacity
Butt hinges are required to support some very heavy interior or fire doors. Therefore, this means that it is necessary to choose a heavy-duty hinge that can withstand the weight. Generally speaking, when choosing a hinge, choose a butt hinge with a load-bearing capacity of up to 120kg.
Corrosion resistance
When the hinge works in an outdoor humid environment, choose the butt hinge to ensure that the hinge withstands the impact of oxidation, pass the 96h netural neutral salt spray test and choose a suitable corrosion-resistant hinge.
Durability
Wear and tear will affect the hinge, choose a high-durability hinge that has passed the 200,000-cycle test for a longer service life.
Fire-rated
To comply with fire safety, ensure that the hinge remains intact and safe in the event of a fire, and is suitable for fire doors.
How to install butt hinges?
To install a butt hinge, you will need a drill, a drill bit, screws, and a screwdriver. Here is a step-by-step guide on how to install a butt hinge:
First, hold the butt hinge in place on the door and mark the locations of the screw holes on the door with a pencil.
Drill pilot holes at the marked locations on the door using a drill bit that is slightly smaller in diameter than the screws that came with the butt hinge.
Hold the butt hinge in place on the door again, and use a screwdriver to secure it to the door with the screws.
Repeat the above steps on the door frame, making sure to align the hinge with the one on the door so that the door will close properly.
Once both hinges are installed, test the door to make sure it opens and closes smoothly.
How to size hinges?
To size hinges, you’ll need to consider several factors, including the weight of the door, the type of door, and the type of opening. Here are some general steps to help you size hinges for your specific application:
First, determine the weight of the door. This will help you choose the right size and type of hinges for your door.
Next, consider the type of door and the type of opening. For example, a lighter door may require smaller hinges, while a heavier door may need larger hinges to support its weight.
Once you have this information, you can use a hinge sizing chart or calculator to determine the appropriate size of hinges for your door.
- The calculation for the quantity of hinge:
- door height≤door height≤1524mm／2 pcs
- 1524mm≤door height≤2286mm ／3pcs
- 2286mm≤door height≤3048mm／4pcs
Finally, take into account any special requirements or conditions, such as the need for non-removable pins or special finishes.
It’s always a good idea to consult with a professional or do some research before purchasing and installing hinges to ensure that you choose the right size and type for your specific application.
Problems during the use of butt hinge and how to solve it?
Like any type of hardware, butt hinges can experience problems during use. Some common problems with butt hinges include:
Butt hinges creak
Friction in a butt hinge can be caused by a buildup of dirt or dust, or a lack of lubrication between the metal surfaces of the butt hinge and the hinge pin. It’s this metal-to-metal friction that causes the squeak.
Fixing squeaky hinges starts with a door hinge cleaning item to remove accumulated dirt. Next, you’ll need a door hinge lubricant such as olive oil or petroleum jelly to ensure that the honges parts move smoothly without resistance or friction from other parts.
Loose hinges
Check that the hinges are tight: open the door, grab the lock edge and move it up and down. If you see movement around the hinge screws, you need to retighten them.
Try tightening the screws: If the screws are only loose for a short while, you should be able to tighten them yourself with a screwdriver. However, if you find that the holes have become too large for the screws to tighten, they need to be repaired.
Repairing screw holes: To repair screw holes, you need to remove loose screws. Dip the end of the matchstick in some glue, then use a hammer to drive it as deep as you can into the screw hole. Break the match so it is flush with the hinge board. Try screwing the screw back into the hole with a screwdriver. Repeat until all enlarged screw holes are secured.
Stuck hinge pin
Just wedge the bit of a screwdriver under the head of the hinge pin, then lightly tap the handle of the screwdriver with a hammer to push the pin up and out of the hinge until you can slide the pin out with your finger.
How to produce butt hinges？
European butt hinge production is becoming more and more automated, resulting in the overall size of the butt hinge being fixed, automated production lines can reduce labor costs and achieve the lowest product prices; secondly, automated machine production can improve precision and achieve better mechanical properties and product consistency.
SDH has an automatic production line for butt hinges, which can produce different sizes of butt hinges that comply with European standard EN1935.
Professional hinge manufacturer
Häfele is an internationally renowned manufacturer and distributor of innovative furniture accessories, accessories, hardware and hardware products. Extensive experience and expertise around the world.
DORMAKABA is one of the world’s leading companies in the smart and secure access solutions field.
ASSA ABLOY is the largest global supplier of intelligent lock and security solutions. One in every 10 lock and security installations worldwide uses ASSA ABLOY products.
GEZE ranks among the world’s best for products, systems and services related to door, window and safety technology as well as automatic doors.
Allegion sells more than 30 brands worldwide and specialize in doorway and perimeter security: everything from residential and commercial locks, door closers and exit devices, steel doors and frames, to access control and workforce productivity systems.
Can’t Find Ideal Hinge For Your Industries? SDH provide customized solutions to all our customers and offer free hinge samples that you can take advantage of.
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Contact：Mag Liu
Email: mag@euprotek.com
Tel/Whatsapp: ＋86 18364685393
