TFC Talks Smalley: Part 2 on Crest-to-Crest® Design Specifications

~Justin Lawrence answers more questions about the design specifics of Smalley wave springs~

Welcome back to Smalley Talk. This week, Justin Lawrence answers more questions about the design specifics of Smalley wave springs.

What are the overall design limitations on wave spring?

We can design and manufacture wave springs ranging in diameters from about 4mm (0.160″) to near 3m (120″). Actual design parameters will vary depending on the diameter, working lengths and performance requirements of each application. Typically what we are looking for to design a spring is the physical space available to locate the spring, and the operational requirements. Load characteristics, dynamic movement, operating temperature and environment will all influence the design so it’s best to contact a TFC Engineer to discuss any potential design so we can help you to secure the most appropriate solution.

When specifying a wave spring, what are the diameter tolerances?

Every wave spring has two diameter measurements, the inside diameter and the outside diameter. When manufacturing wave springs we control one of these diameters to ensure correct operation in the application. The second diameter is a function of this controlled diameter ± the radial wall chosen for the design.

There is no single rule that determines diameter tolerance. Typically a wave spring will be guided either on a shaft or within a housing and this will normally dictate which diameter we control during manufacture. In some applications we can even design in a small interference fit to provide optimal performance and near perfect concentricity within the assembly. TFC engineers are available to discuss the best option with you to ensure that the correct clearances are in place so that the spring functions without binding or snagging on mating parts.

That’s all for now, and next time Justin will complete the mini-series on design specifics for wave springs. You can see more blog entries and other application examples on our technical articles page.