Variable stiffness spring –(KCMCO-KCT-1245) resistance of the coil to load can be dynamically varied for example by the control system,some types of these springs also vary their length thereby providing actuation capability as well
They can also be classified based on their shape:
Flat spring – (KCMCO-KCT-1220)this type is made of a flat spring steel.
Machined spring – (KCMCO -KCT-1220) this type of spring is manufactured by machining bar stock with a lathe and/or milling operation rather than a coiling operation. Since it is machined, the spring may incorporate features in addition to the elastic element. Machined springs can be made in the typical load cases of compression/extension, torsion, etc.
Serpentine spring –(KCMCO-KCT-1280) a zig-zag of thick wire – often used in modern upholstery/furniture.
Garter spring –(KCMCO-KCT-226) A coiled steel spring that is connected at each end to create a circular shape.
The most common types of spring are:
Cantilever spring – (KCMCO-KCT-208)a flat spring fixed only at one end like a cantilever, while the free-hanging end takes the load.
Coil spring or helical spring– (KCMCO-KCT–235) a spring (made by winding a wire around a cylinder) is of two types:
Tension or extension springs are designed to become longer under load. Their turns (loops) are normally touching in the unloaded position, and they have a hook, eye or some other means of attachment at each end.
Compression springs are designed to become shorter when loaded. Their turns (loops) are not touching in the unloaded position, and they need no attachment points.
Hairspring or balance spring –(KCMCO-KCT-540) a delicate spiral spring used in watches, galvanometers, and places where electricity must be carried to partially rotating devices such as steering wheels without hindering the rotation.
Leaf spring – (KCMCO-KCT-826)a flat spring used in vehicle suspensions, electrical switches, and bows.
V-spring – (KCMCO-KCT-808)used in antique firearm mechanisms such as the wheellock, flintlock and percussion cap locks. Also door-lock spring, as used in antique door latch mechanisms.
Other types include:
Belleville washer or Belleville spring –(KCMCO-KCT-660) a disc shaped spring commonly used to apply tension to a bolt (and also in the initiation mechanism of pressure-activated landmines
Constant-force spring — (KCMCO-KCT-880)a tightly rolled ribbon that exerts a nearly constant force as it is unrolled
Gas spring –(KCMCO-KCT-1245) a volume of compressed gas
Ideal Spring – (KCMCO-KCT-1220)a notional spring used in physics—it has no weight, mass, or damping losses. The force exerted by the spring is proportional to the distance the spring is stretched or compressed from its relaxed position.
Mainspring – (KCMCO-KCT-20Ba spiral ribbon shaped spring used as a power store of clockwork mechanisms: watches, clocks, music boxes, windup toys, and mechanically powered flashlights
Negator spring – KCMCO-KCT-35W a thin metal band slightly concave in cross-section. When coiled it adopts a flat cross-section but when unrolled it returns to its former curve, thus producing a constant force throughout the displacement and negating any tendency to re-wind. The most common application is the retracting steel tape rule.
Progressive rate coil springs –KCMCO-KCT-0520 A coil spring with a variable rate, usually achieved by having unequal distance between turns so that as the spring is compressed one or more coils rests against its neighbour.
Wave spring – KCMCO-KCT-20B any of many wave shaped springs, washers, and expanders, including linear springs—all of which are generally made with flat wire or discs that are marcelled according to industrial terms, usually by die-stamping, into a wavy regular pattern resulting in curvilinear lobes. Round wire wave springs exist as well. Types include wave washer, single turn wave spring, multi-turn wave spring, linear wave spring, , interlaced wave spring, and nested wave spring.