This table summarizes the spring types classified by the shape.

[Table 1] Spring types classified by shape

Types of springs (Classified by shape) Overview Drawing No. a) Coil springs Most popular and common springs. Easy to produce, effective, inexpensive. Provide various functions, including compression, tensile strength, and torsion. b) Spiral springs Spiral shaped springs designed to add torque from the spring's elastic deformation. c) Disc springs A disk containing a hole in the middle is processed into a conical shape, which is used for areas requiring constant load reaction at low volume. d) Fastener springs Springs in various shapes used for fastening. The examples include spring washers, E-type retaining rings, and spring pins. e) Laminated leaf springs Frequently used for suspension of heavy objects (such as vehicles). f) Flat springs A flat plate is processed into a shape that will deliver the intended spring functions. The examples include points of contact, clamps, and tightening parts of piping joint. g) Torsion bars A twist of the bar is applied for spring action. Used as a stabilizer for automobiles. It is also called torsion bar suspension. Shaped like a bamboo shoot and used for shock mitigation. Types of springs (Classified by shape) Overview Drawing No.

Besides shape, springs can be classified by the following categories:

• Classification by materials (e.g. metal/non-metal)
• Classification by the direction of forces applied to the spring (e.g. tensile, compression, torsion)
• Classification by purpose (e.g. load substitution, shock mitigation, vibrational relaxation, force accumulation)
• Classification by operating environment