RS PRO 21.1mm Black Potentiometer Knob for 6.35mm Shaft Splined

These low-profile potentiometer knobs from our own RS PRO brand are suitable for a 6.35mm shaft. With Brass bushings and a high-quality plastic casing, these potentiometer knobs are durable and practical. With a range of compatible knob skirts available, they are ideal for a variety of applications and environments.

• Resists shock, vibration, or accidental movement
• No special mounting hardware or tools required
• Made of highest quality materials
• Occupies minimum panel space

There are many different uses of a potentiometer. The three main applications of a potentiometer are:

• Comparing the emf of a battery cell with a standard cell
• Measuring the internal resistance of a battery cell
• Measuring the voltage across a branch of a circuit

Most potentiometer knobs are simply fixed on manually with a simple push by fitting it to the shaft. They either have a knob, screw, grub, or slider as a fixture that is used as a control element to vary the resistance between the middle terminal and either one of the outer terminals for the potentiometer.

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.

A selection of black high-quality compression mouldings with brass bushes suitable for inch diameter spindles. The knobs are recessed to accommodate control mounting nuts, except the Standard inch version, which also has a 6BA grub-screw. All other knobs have 4BA grub-screws.

Shaft Fitting & Skirts

Control Knobs in (6.35mm) Shaft Fitting