Internal Hardware for dual concentric knobs

[birdyguy]

Hi Ed

The ones you are showing are "collet" type fixing. I have never seen the actual business bit sold separately !

I personally use the set screw fixing like Efe Cem Elci is showing. I have a friend that makes all Boeing knobs at a fraction of the price of the commercial items, including Concentric knobs. Here is a pic of one of the pairs he made for me for my EFIS (he does grey too) The panel itself I made though you cant really see it.

Attachment 8675

If you are inerested I can ask him to for prices (I made panels for him in exchange )

John

Elf Cem Elci - . I have set screws like you show in your posted image so I think that will probably be the easiest solution to secure the knobs to the shafts.

John, I am experimenting with making my own knobs as well and appreciate your offer. If mine don't work out I will contact you but It looks like I will go with the set screw method as well.

Thanks Guys.

[John_B]

John, I am experimenting with making my own knobs as well and appreciate your offer.

Yeah sorry I miss read the original post ...too much haste!

Like hot melt glue...set screws are our friend!

John