Usually cylindrical metal spring because of making a brief, and can be made into various types according to the load situation, structure brief, therefore, the most widely used.

Hardware spring production materials generally should have high elastic limit, fatigue limit, impact toughness and excellent heat treatment function, etc., common carbon steel wire, spring steel wire, stainless steel and enamelled copper wire, nickel wire, and so on.

Hardware spring production method with method of cold rolled and hot rolled. Hardware spring wire diameter less than 8 mm of commonly used method of cold roll, greater than 8 mm with hot volume method. Some hardware spring after made to crush or shot peening treatment, progress of hardware spring load ability.

Compression screw hardware spring hardware spring is to accept the pressure, the materials used in the cross section is round, more useful also rectangular and multi-strand steel rolled a travelling hardware spring usually for pitch, such as tightening the shape of the hardware spring are: cylindrical, conical, convex and concave, and a few of the noncircular, etc.

Tightening hardware spring coil, the gap between the ring and some have hardware spring when under external load reduced deformation, deformation energy storage.

What is the torsion hardware spring? Torsion hardware spring using the lever principle, through to the material softness and toughness larger distorted or rotating elastic material, make have a great deal of mechanical energy.

Tensile hardware spring is accept axial tension screw hardware spring, stretching hardware spring are usually made of material with circular cross section. Don't accept load, tensile hardware spring between the ring and ring is usually no gap and tight.