Collet knobs for concenttic switches. (Product Tech Highlight: Switches & Relays).
Elma Electronic offers collet knobs for concentric switches which can be difficult to find in the marketplace. The collet knobs work with all standard concentric switches in the industry. Concentric switches have a two-in-one design, with two independent rotary switches integrated in a single plane, inner-shaft/outer shaft arrangement. Elma's larger (bottom) collet knobs mount on the outer larger shaft and have a hollow center. This allows a top (smaller) knob to mount on the smaller inner shaft of the switch. Concentric design knobs and switches are used in various medical, audio and instrumentation applications. The collet style knob uses metal "fingers" that tighten evenly around the shaft. …
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