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'''Knobs''' fit on controls, e.g. [[potentiometers]] or sliders, push button and [[rotary switches]].
== Use with potentiometers ==
[[File:Knobs to fit D and T18 pot shafts.jpg|thumb|right|150px|The fit of knobs for D and T18 pot shafts.]][[File:Potentiometer knob with set screw.jpg|thumb|right|150px|Potentiometer knob with set screw.]]SplinedT18 push on knobs fit splined pot shafts. Pots with with round or D shafts require knobs with plain holes that if not push fit, have set screws to hold them in place. Most spline shaft pots have a slightly smaller diameter shaft than round or D shaft. Usually splines are 6mm while most round ones are 1/4" (6.35mm). So 1/4" setscrew knobs will end up slightly lopsided when tightened onto a 6mm spline shaft. Knobs fastened by a collet require a box spanner to fasten them.<ref>[https://www.muffwiggler.com/forum/viewtopic.php?t=54215&sid=0c1a5b9d1c9d353c1a8e025489dcf6ac knurled vs round shaft pots], Muff Wiggler forum, March 2012</ref><ref>Wikipedia: [https://en.wikipedia.org/wiki/Control_knob Control knob]</ref>
== Knobs in common use ==
=== Aries, Macbeth, Modcan B ===
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