Torsion springs belong to coil springs. The end of the torsion spring is fixed to other components. When other components rotate around the center of the spring, the spring pulls them back to the initial position, generating torque or rotational force. The torsion spring can store and release angular energy or statically fix a device by rotating the force arm around the central axis of the spring body. This type of spring is usually tight, but there is a pitch between the coils to reduce friction. They generate resistance to rotation or external forces of rotation. According to the application requirements, the rotation direction of the torsion spring (clockwise or counterclockwise) is designed to determine the rotation direction of the spring. Each coil is tightly or separately wrapped, and can be suitable for torsion load (at right angles to the spring axis). The end of the spring can be wound into a hook or a straight torsion arm.
