Wave springs: one technology, thousands of applications

From miniature medical devices and robotics to aerospace, automotive and heavy industry, wave springs solve remarkably diverse engineering challenges. Their compact design, precise load characteristics and extensive material options allow engineers to reduce space and weight without compromising performance. AFC Europe explores why Smalley wave spring technology is finding a place in an extraordinary range of applications.

Look inside two completely unrelated pieces of equipment and you might be surprised to find the same fundamental spring technology at work.

One could be a compact medical device where every millimetre of space matters.  Another might be machinery operating in an aggressive oil and gas environment. Elsewhere, the same technology can be found in automotive systems, aerospace applications, robotics, pumps, valves, bearings and high-performance industrial equipment.

The applications could hardly be more diverse. The common denominator is the engineering challenge: how to deliver a precisely controlled spring force within the available space.

Unlike a conventional round-wire compression spring, a Smalley wave spring is manufactured from flat wire formed with waves that provide its spring effect as an axial load is applied.

The geometry allows a wave spring to provide comparable force and deflection to a conventional coil spring while potentially reducing spring height by as much as 50%. For engineers trying to make an assembly smaller or lighter, that reduction in axial space can influence the design of the entire product.

And that advantage translates remarkably well between industries.

In aerospace, reducing component size and weight while maintaining precision and repeatable performance can be critical. Wave springs can provide preload and compensate for tolerances without requiring the axial space (and weight) associated with a conventional coil spring.

Move into automotive and transportation, and the challenges change. Components may encounter millions of operating cycles, vibration, temperature variation and demanding packaging constraints. Wave springs can be engineered into applications throughout the vehicle where controlled loading and compact dimensions are required.

At the opposite end of the scale is medical technology, where equipment continues to become smaller and increasingly sophisticated. Smalley wave springs are available in diameters from just 4mm. Their compact geometry makes the technology particularly interesting where designers need controlled spring characteristics inside miniature mechanisms.

But wave spring technology isn't only about miniaturisation.

In heavy industry, energy and oil & gas, the challenge can instead be large diameters, substantial forces, temperature extremes, corrosion or aggressive operating environments. Material selection therefore becomes as important as geometry. More than 40 material options are available for Smalley products, including specialist alloys for applications where standard carbon or stainless steels may not be appropriate.

What could you achieve if your spring needed only half the space?

Visit afceur.com to find out more or email us at enquiries@afceur.com.