Good ways to mount 9mm external trims with no nut?

[midwayfair]

http://www.smallbearelec.com/servlet/Detail?no=1277
http://www.mouser.com/ProductDetail/Bourns/PTV09A-4015U-B103/?qs=sGAEpiMZZMtC25l1F4XBU3e2YUsD%2fp65C3dD%2fbepHMI%3d

I've got something in the works using the TAPFLO chip, and I'm kind of keen on using some of these external trimmers instead of six full knobs to make for a cleaner control panel.

If I use these, is the only reasonable way to keep them in place to PCB mount them to a PCB that also has regular board-mounted pots with set screws? Or is there some other good way to keep them in place?

Or might it be better to go with something like this, which has the plastic marked shaft but also has a nut?
http://www.mouser.com/ProductDetail/Bourns/3310H-003-103L/?qs=sGAEpiMZZMtC25l1F4XBUzucK%2fsLA9im4ME7xC0jrak%3d

[aion]

If I use these, is the only reasonable way to keep them in place to PCB mount them to a PCB that also has regular board-mounted pots with set screws?

That's the only good way I've found to do it. But one more consideration beyond that: you'll want to use multi-axis PCB mounting if at all possible. What I mean by this is that your PCB-mount pots (the "anchors") should not have their lugs all in one single row, as this would allow the PCB to flex slightly along that axis when the external trimmers are used. You could even risk the joints cracking if the trimmers were bumped too hard.

It's hard to explain without a drawing, but for example, if you were using a standard 1590B with two 16mm PCB-mount pots at the top and then a row of three 9mm pots below, you'd maybe want the left 16mm pot's lugs facing to the right and then the right pot's lugs facing down, as opposed to both facing downward so all six pads are in a row.

[Mark Hammer]

I don't know what value/s you need, but Allelectronics has some small size ones with retaining nuts:
http://www.allelectronics.com/make-a-store/item/ATP-105/1M-AUDIO-TAPER-POTENTIOMETER-1/4-SHAFT/1.html
http://www.allelectronics.com/make-a-store/item/ATP-254/250K-AUDIO-TAPER-POT-1/4-SHAFT/1.html
http://www.allelectronics.com/make-a-store/item/LTP-253/25K-LINEAR-TAPER-POTENTIOMETER-1/4-SHAFT/1.html

[midwayfair]

I don't know what value/s you need, but Allelectronics has some small size ones with retaining nuts:
http://www.allelectronics.com/make-a-store/item/ATP-105/1M-AUDIO-TAPER-POTENTIOMETER-1/4-SHAFT/1.html
http://www.allelectronics.com/make-a-store/item/ATP-254/250K-AUDIO-TAPER-POT-1/4-SHAFT/1.html
http://www.allelectronics.com/make-a-store/item/LTP-253/25K-LINEAR-TAPER-POTENTIOMETER-1/4-SHAFT/1.html

Unfortunately those still need the knob. I'm looking to use the kind that have the position indicator right on the shaft. Otherwise, I'd just use the regular alpha 9mm pots since I have bunches.

I'm starting to lean toward dual concentric pots (Smallbear has them in 9mm) if I can't secure the PCB-mounted ones in the enclosure. I need to think about this some more. There might be some method I'm missing. I might be able to drill the jack placement with top jacks just right and use enclosed jacks in such a way as to hold the entire 9mm pot assembly down. I don't know if I'm up to the task of such Zen drilling though ... guess I'll find out soon enough.

[defaced]

PCB Standoffs?

[midwayfair]

PCB Standoffs?

I thought about that, but then I need a way to mount the standoffs to the enclosure and I'm in the same boat! :/

[Mark Hammer]

I don't know what value/s you need, but Allelectronics has some small size ones with retaining nuts:
http://www.allelectronics.com/make-a-store/item/ATP-105/1M-AUDIO-TAPER-POTENTIOMETER-1/4-SHAFT/1.html
http://www.allelectronics.com/make-a-store/item/ATP-254/250K-AUDIO-TAPER-POT-1/4-SHAFT/1.html
http://www.allelectronics.com/make-a-store/item/LTP-253/25K-LINEAR-TAPER-POTENTIOMETER-1/4-SHAFT/1.html

Unfortunately those still need the knob. I'm looking to use the kind that have the position indicator right on the shaft. Otherwise, I'd just use the regular alpha 9mm pots since I have bunches.

I'm starting to lean toward dual concentric pots (Smallbear has them in 9mm) if I can't secure the PCB-mounted ones in the enclosure. I need to think about this some more. There might be some method I'm missing. I might be able to drill the jack placement with top jacks just right and use enclosed jacks in such a way as to hold the entire 9mm pot assembly down. I don't know if I'm up to the task of such Zen drilling though ... guess I'll find out soon enough.

Gotcha.  Duly noted.

[defaced]

PCB Standoffs?

I thought about that, but then I need a way to mount the standoffs to the enclosure and I'm in the same boat! :/

I'm not sure I follow.  You'd board mount the pots like you mentioned in your first post, then instead of using regular full sized pots as the supports you'd use the standoffs to secure the board/pot assembly to the enclosure.  You could also just use a PCB spacer and a single screw/washer/nut to secure the assembly.  Keystone Electronics products are sold by Mouser and has a plethora of options to consider: www.keyelco.com/