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4mm Shaft Top Hat Control Knob With Collet Fixing

4mm Shaft Top Hat Control Knob With Collet Fixing

A top-hat style rotary control knob with a clamp / collet shaft fixing. This knob has a flat skirt at the base, straight sides and a flat top cap. The top cap is removed in order to tighten the collet to fix it to the shaft. A position indicator on the skirt provides the positional feedback for the user. This knob has a 4mm hole.
Color
Quantity Unit Price
1+ £0.65
5+ £0.52
10+ £0.455
20+ £0.39
50+ £0.325
100+ £0.26
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Fitting

Knob TypeRotary
Shaft TypeRound
Shaft FixingClamp
Hole Size4mm

Appearance

Identity ColourBlack
Body ColourBlack
Accent Colour
Position Indicator ColourWhite
Position Indicator ShapeSquare

Measurements

Minimum Shaft Depth3.0mm
Maximum Shaft Depth7.0mm
Body Diameter12.1mm
Maximum Diameter16.8mm
Widthmm
Lengthmm
Height15.9mm
Additional Measurements
Unit Weight2.66g
4mm Shaft Top Hat Control Knob With Collet Fixing

Hole Type

Round Hole

A knob designed for a round shaft has a smooth, cylindrical hole that matches the shaft's shape. This type of hole allows the knob to slide easily onto the shaft, relying on a grub screw / set screw or friction to keep it in place. This design is widely used in audio equipment, consumer electronics, and control panels due to its simplicity and versatility

A knob with a round hole can typically also be used on a D type shaft in the 180° position (where the position indicator is opposite to the flat of the D) and can often also be mouned to splined shafts in low torque applications.

A View from the underside of the knob when fitting a round hole knob to a D shaft, showing the grub screw position relative to the position indicator:

Measuring Rotary Knobs

Read more about measuring rotary knobs here.