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We offer potentiometer dials with 10 turns to 100 turns, and shaft diameters 3.17mm to 6.35mm. Like any type of potentiometer knob, it is important to ensure the potentiometer dials are mechanically compatible with the chosen potentiometer.

What are the different types of potentiometer knob?

Apart from any dimensional considerations, potentiometers have three types of shaft: accordingly, it is important to choose a compatible knob.

The solid shaft potentiometer is the most common; it has no splines or splits. The best knob for this is one with a set screw.

Other potentiometers have a split shaft with splines. These are available with different tooth counts, so it is important to obtain a knob with the same tooth count to obtain a good, reliable fit without damaging the spline. These knobs simply push fit onto the shaft, and can be removed if sufficient force is applied.

The third and final type is a D shaft potentiometer. The shaft is a D shape, with a cut out flat spot. A set screw knob could be made to fit, but the results will not be satisfactory. It is better to obtain a compatible D shaft knob.