Door closer springs

Door closers are a type of door locking hardware used to automatically reset the door to a device. It is usually used on stairways and partition doors in public places. The spring inside the device is usually made of flexible metal, usually of high carbon steel or stainless steel, and its main function is to cushion the force of the automatic door closing.

The door closer spring is usually a cylindrical coil spring that sits between the body of the door closer and the base of the locking mechanism. The spring provides resistance and helps to hold the door in place as it compresses and expands when the door is pulled back. When the door is released when it is opened, the spring expands and the door is pushed back into its locked position.

The design of the door closer spring is critical to the performance of the door closer's operation and the spring is often customized to suit the particular application. Factors such as the size of the door, the force required to move it, and the environment in which the latch will be used all play an important role in determining the best type of spring to use.