RS PRO 21.3mm Black Potentiometer Knob for 6.4mm Shaft Slotted

These collet knobs from our own RS PRO brand are both robust and practical as well as sporting a distinctive aesthetic. The brass bushings provide a secure and durable connection and the high-quality plastic knob features a gloss finish.

Available for Ø 6.4, 6.0 and 3.2 mm shaft sizes.

• 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.