United Equipment Accessories is continually striving to produce products that exceed the requirements of a given market while also providing the best overall value available. This is why when it comes to high revolution applications, which require the transfer of data, such as in-wind turbine applications, UEA uses solid coin silver rings.
The major advantage of coin silver is that it is a consistent material throughout. This means that as it wears, its electrical properties will not change throughout its usable life. In addition, silver is a very good conductor. It is as highly conductive as an electrical contact and has beneficial corrosive properties. Even when silver oxidizes, the oxide is still very conductive, making silver a very robust contact material. Testing done on silver coin rings show impressively low-contact resistance and noise readings, even as the materials reach 10's of millions of revolutions.
In contrast, other offerings in the marketplace include silver, gold, or other precious metal plated rings. The plating process is very delicate and requires high expertise to avoid quality issues. Quality issues can include uneven application of the material. Furthermore, no matter how high-quality the application of the plated material, it will eventually wear and produce inconsistent electrical results. While plating may be less expensive in the short term, it is quickly negated long-term by the cost of re-plating or replacing worn materials, which can exceed five times the material cost.
Through our research and testing, we feel that in high-revolution applications, which require data transfer, solid coin rings provide the best overall value for the customer.