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## How Does a Door Hinge Work?
1. **What is a door hinge and how does it work?**.
2. **What are the main components of a door hinge?**.
3. **What are the types of door hinges available in the market?**.
## Answer:
### What is a door hinge and how does it work?
A door hinge is a mechanical bearing that connects two solid objects, allowing one object to rotate relative to the other. In the case of a door hinge, it is typically attached to the door frame and the door itself. When the door is opened or closed, the hinge enables the door to pivot smoothly without separating from the frame.
### What are the main components of a door hinge?
The main components of a door hinge include two plates, also known as leaves, that are connected by a pin. The pin is the central axis around which the door rotates. The leaves are attached to the door and the door frame respectively, allowing the door to swing open and closed.
### What are the types of door hinges available in the market?
There are several types of door hinges available in the market, including:
- **Butt Hinges:** These are the most common type of door hinge and are often used on interior doors. They are composed of two rectangular metal plates with screw holes.
- **Piano Hinges:** Also known as continuous hinges, these hinges are long and narrow, running the entire length of the door. They are commonly used for cabinet doors or light-weight doors.
- **Spring Hinges:** These hinges are equipped with a spring mechanism that automatically closes the door after it has been opened.
- **Ball Bearing Hinges:** These hinges have ball bearings positioned between the hinge knuckles to reduce friction and allow for smoother operation.
In summary, a door hinge functions by connecting the door to the door frame and allowing the door to pivot open and closed. The main components of a door hinge are the leaves and the pin. There are various types of door hinges available, each designed for different applications and requirements.
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