The torsion spring belongs to the spiral spring category.

The ends of the torsion spring are fixed to other components, and when the other components rotate around the center of the spring, the spring pulls them back to the initial position, generating torque or rotational force.

Torsion springs can store and release angular energy or statically fix a device by rotating the arm around the central axis of the spring body. These springs are usually tightly wound, but there is spacing between the coils to reduce friction. They resist rotational or external rotational forces. Based on application requirements, the direction of the torsion spring (clockwise or counterclockwise) is designed, thus determining the spring’s orientation.Each coil can either be tightly wound together or spaced apart, enabling it to handle twisting loads (perpendicular to the spring axis). The ends of the spring can be fashioned into hooks or straight torsion arms.

Torsion springs are mechanical parts that work using elasticity. They are generally made of spring steel. They are widely used to control the motion of machinery, mitigate shocks or vibrations, store energy, measure force magnitudes, etc., in industries such as computers, electronics, home appliances, cameras, instruments, doors, motorcycles, harvesters, automobiles, and more. The main types of production equipment include: digitally controlled multifunctional computer spring coilers, mechanical automatic spring coilers, spring grinding machines, heat treatment equipment, large-scale hot coil spring production lines, and quality testing instruments.