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Have you got the right spring for your application?

Smalley Talk is where our engineers answer commonly asked Retaining Ring and Wave Spring questions. This week, our Product Manager, Simon Ward describes how to properly measure your Wave Springs to ensure that you have the right part for your application.

What is the free height?
It is sometimes important to know how to properly measure the free height of our Crest-to-Crest wave springs in order to verify the correct part is being used for the application. However it is essential to understand what is meant by the term ‘free height’ and this is defined as the height at which a wave spring is measured in its free state.

How should you measure the free height of your Smalley Wave Springs?
When done correctly, it can save valuable inspection time but, because of the finished form of our multi-turn Smalley springs, this is not always easily achieved. The following guidelines should help to correctly assess the free height of our springs:

Ensure the spring is sitting on a flat surface between two parallel plates.

Lower the top measuring surface until it touches the spring.

Apply a slight force to deflect the spring until the crests of all waves come in contact with the loading surfaces (top & bottom).

The distance between the two parallel plates is the free height.

TFC Europe Ltd is one of the leading suppliers of technical fastener components to industry, with an unrivalled reputation for delivering innovative products, supply solutions, and exemplary service, to help our customers achieve breakthroughs in product development and productivity.

From the very beginning TFC’s founders in Heathfield, UK were determined to help equipment designers by supplying technical fasteners enabling them to design a better product and to generate more profits for their companies. Half a century later this same approach means that TFC helps not only the designer but also the buyer, and the operations teams by providing a wide variety of fastener and related components via automated and sophisticated supply systems that enable lean manufacturing goals to be met and our customers to improve their profits.

In so doing TFC has become one of the leading fastener distribution businesses in Europe supplying over 3,000 customers, employing over 100 people, working out of a national and European network of logistic service centres as well as being able to support global customers in their manufacturing plants anywhere in the world.

Whether it is a simple threaded bolt or a complex bespoke product made to customer drawing specifications, our quality assured fasteners are guaranteed to provide the perfect solution to your fastening needs.

– Bolts & Socket Screws in various grades
– Smalley Wave Springs and Spirolox Retaining Rings
– Nuts, Washers, Rivets & Screws of all types
– Sheet Metal Fasteners – self-clinch & rivet bushes
– Circlips, Springs, Keys and Seals
– Threaded Inserts – for plastics, timber & metal
– Electronic Hardware – standoffs, handles, ferrules
– Construction Fixings – anchors, through bolts, resin
– Panel, Wire & Pipe Fasteners
– Machined and turned parts to specification

Supply Chain Services – Our supply chain expertise provides significant benefits to customers by reducing costs associated with the purchase, stockholding and handling of a wide range of low-cost fastening and ancillary items. With a flexible inventory managed system; DLF, Kanban or VMI to reduce the supplier base, minimise inventory, direct to the line quality approved products immediately at hand, customers are able to remove a whole variety of hidden administration and transaction costs.

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