Looking for motorized Volume Pot with knurled Shaft, Shaft Length 25 mm - 30 mm

[tiefbassuebertr]

For retrofit volume remote control in vintage integrated amplifiers and FM stereo receivers (like various Luxman devices e. g. L-190-210-230-400) I am looking for a motorized pot with 27mm or 30 mm shaft length.

The wanted shaft sizes you will find on the images No.1-6

Unfortunately most versions I have found uses shaft length below 25mm, and additional sometimes only in a flatted or not flatted but no knurled shaft version - go to https://www.ebay.com/sch/i.html?_fr...0.l1313&_nkw=motorized+potentiometer&_sacat=0
and to the images No.7-10 (except No. 9 with 20mm knurled shaft)

Where I can order motorized potentiometers with shaft version from image No.1-6 ?
Thank you for an advice.

 

[MAAC0]

Unfortunately modern equipment use flatted shafts.
A small 2mm hole on the side of the button & an Umbrako screw would be my best bet.

 

[tomchr]

You can buy bosses/inserts that press into a circular bore and gives you a D shape for the shaft. If you can't find a pot with a knurled shaft, that may be an option for you.

Tom

 

[tiefbassuebertr]

maybe adapter for shafts in the right manner are helpful. Basically like this:
Potentiometer shaft extension - STLFinder
Achsverlangerung o 8mm Achse o 6x4,6mm 112933 | gastrotiger
Dnk5980 Extension Shaft Knob Level Hi Mid Low for Pioneer DDJ S1 for sale online | eBay
Extension Kit, Frame, Bush, Rod & Coupler | Hifi Collective
Achsverlangerung L1 18mm Gesamtlange 28mm 5501 | gastrotiger
But from flatted shaft (D-shaft) to knurled version in the appropriate length.

Unfortunately modern equipment use flatted shafts.
A small 2mm hole on the side of the button & an Umbrako screw would be my best bet.

thank you. Mean you an allen screw ?

 

[tiefbassuebertr]

Yesterday I have found any shaft remnants from cutting too long potentiometer axle in knurled version. So I can use easy to find shaft coupler/axle coupler
and clamping shaft coupler from the attached images.

 

[tiefbassuebertr]

For situations, where the outer diameter of shaft coupler is too large resp. too big, real shaft adapter units from flatted to knurled shaft like to see in the kind from this images is the better solution.
If outer diameter still too big, the solution from the last three images is the only possibility.

Here any terms for google therefore:
potentiometer Lengthening Shaft
Extension shaft potentiometer
Extension shaft adapter
starre Kupplung
Wellenkupplung
Shaft Coupler
Clamping Shaft Coupler
potentiometer axle coupler
Clamping axle extension
potentiometer axle adapter

 

[PRR]

1/4" 6mm rubber fuel hose can couple shafts. Smooth and cheap.