Pot shaft adaptors, extenders, bushes & etc, links to suppliers

[pvision]

Selection of links to various shaft adaptors. I was looking for a way to use 6.35mm knobs with 6.35mm flatted shafts, but haven't found anything yet. This search threw up a few links which may be of interest. Please add other useful links

6.35 -> 6mm adaptor
https://www.thonk.co.uk/shop/brass-pot-adapters-x20/

6.35 -> 4mm adaptor
https://uk.rs-online.com/web/p/reducing-bushes/0689136

6.35 -> 4mm adaptor
http://www.banzaimusic.com/Axis-Converter-6-3mm-4mm.html

6.35 -> 3.2mm adaptor
https://uk.rs-online.com/web/p/reducing-bushes/0689120

Huko bore adaptor datasheet
https://www.altraliterature.com/-/m...hd-a4-sections/p-7293-hd-a4_boreadaptors.ashx

Flatted shaft extenders
https://www.aliexpress.com/item/4000934887207.html

6.35mm shaft extenders
https://www.ebay.co.uk/itm/224824305018

DIY knob inserts
https://www.thonk.co.uk/shop/diy-knob-inserts/

 

[gyraf]

Star extender: https://www.aliexpress.com/item/32663931076.html
Regular: https://www.aliexpress.com/item/1005005652113383.html

 

[zzzzz]

When you say flatted, do you mean knurled / slotted shaft, or D-shaft?

Smallbear (now owned by Synthcube here in Massachusetts) has a lot of great stuff like that: https://smallbear-electronics.mybig...ter-1-4smooth-set-screw-to-6mm-knurled-split/ (looks to be currently out of stock)

Love My Switches, stompbox parts, has them too: https://lovemyswitches.com/potentiometer-adapter-sleeve-6-0mm-knurled-shaft-to-1-4-shaft-adapter/

For D shaft, could always use one of those and then glue it / shim the open “D” space.

Also an adaptor for using 1/4” (6.35mm) shaft knobs on 1/8” shaft — little pricey: https://smallbear-electronics.mybigcommerce.com/knob-shaft-adapter-1-4-to-1-8/

Edit: didn’t realize links to these types of items were already posted above, sorry. These are USA based sellers, though, so I guess still relevant.

Edit x2: would also be interested in a cheaper source for 1/4” knob to 1/8” shaft adaptors, as I have a whole lot of nice high end 1/8” shaft pots that I got in a job lot.

 

[rock soderstrom]

Some useful links. Thanks all.

+1

 

[warpie]

Indeed!

 

[DarkSky]

When you say flatted, do you mean knurled / slotted shaft, or D-shaft?

Can't speak for @pvision (of course), but I've encountered a lot of people over the years who use "flatted" and "D-shaft" interchangeably. At any rate, I took it that @pvision meant D-shaft.

Love My Switches, stompbox parts, has them too: https://lovemyswitches.com/potentiometer-adapter-sleeve-6-0mm-knurled-shaft-to-1-4-shaft-adapter/

I've long wished for a satisfactory solution for adapting knurled shafts to take 1/4" knobs, which is what the LMS link purports to be. Thanks for posting it!

However their pic and description indicate that it's just a tube (with planar/cylindrical surface inside and out) so I'm wondering how well it could be expected to 'grip' on knurled shafts. I'd envisaged something that would either key to one or more splines or to the centre slot that knurled shafts have.

Curious if anyone here has direct experience with these and comment on how (and how well) they work?

 

[zzzzz]

Curious if anyone here has direct experience with these and comment on how (and how well) they work?

I've used them one time (purchased from Smallbear rather than LMS, looks to be the same though) and they worked great!

 

[Ricardus]

Great stuff. I might have some links to add here. Gotta look.

 

[Brian Roth]

These guys have been around for decades and their wide selection of products are stocked by many distributors:

https://www.keyelco.com/

Bri

 

[Script]

I'm wondering how well it could be expected to 'grip' on knurled shafts.

Could try a 'transmission joint' as used in RC toys. They sell for cheap on A-Xpress. Basically a metal tube with two screws (like knob screws at 90 degree angle to fixate shaft). Just need to find pot shafts -- maybe recycle from broken pots.

 

[jsteiger]

I'll throw my own hat in the ring...We've been out for a while but just got some new 1/8" to 1/4" X 0.335" shaft adapters in.

https://capi-gear.com/catalog/product_info.php?cPath=202_204&products_id=663

 

[TimG]

I saw them at Small Bear and then bought them from Mouser when I knew what to call them. 1/4”-1/8”
https://www.mouser.com/ProductDetail/TE-Connectivity-PB/KR104?qs=uxvR3OIxFgcf/vZL7XsX4Q==&countryCode=US¤cyCode=USD

I guess that’s like finding a book in an I dependent bookstore and going home and buying it on Amazon?