madbeanpedals::forum

General => Open Discussion => Topic started by: thesameage on November 05, 2014, 06:48:06 PM

Title: using a smaller shaft pot in a larger hole?
Post by: thesameage on November 05, 2014, 06:48:06 PM
I am replacing a pot in my jazz bass but could only find the value I needed (50k push/pull) in a smaller sized shaft pot. What can I do to use this pot, but stabilize it in the slightly larger hole?
Title: Re: using a smaller shaft pot in a larger hole?
Post by: davent on November 05, 2014, 11:20:58 PM
I think McMastercarr may have a bushing for the job.
I used a piece of 1/4" brass rod and a drill press to make my own 1/8" shaft to 1/4" knob adapter.

(http://i216.photobucket.com/albums/cc305/davent/IMG_0907_zps6c434544.jpg)
dave
Title: Re: using a smaller shaft pot in a larger hole?
Post by: GermanCdn on November 05, 2014, 11:32:20 PM
Depends how much is "slightly", and if it's a push on or a set screw type knob.

If the difference in diameters is small (i.e. you could measure it with calipers but it's not visually apparent) and it's a set screw type knob, you could build up the shaft with heat shrink tubing  fairly easily. 

Otherwise, go with Dave's suggestion.

EDIT - if it's just the diameter of the hole in the pickguard/control plate you're worried about, a second larger flat washer will do the trick.
Title: Re: using a smaller shaft pot in a larger hole?
Post by: danwelsh on November 07, 2014, 04:46:44 AM
Quote from: GermanCdn on November 05, 2014, 11:32:20 PM
Depends how much is "slightly", and if it's a push on or a set screw type knob.

If the difference in diameters is small (i.e. you could measure it with calipers but it's not visually apparent) and it's a set screw type knob, you could build up the shaft with heat shrink tubing  fairly easily. 

Otherwise, go with Dave's suggestion.

EDIT - if it's just the diameter of the hole in the pickguard/control plate you're worried about, a second larger flat washer will do the trick.

That's a wicked awesome idea for the heat shrink tubing......I bet I'll use that someday. Thanks.
Title: Re: using a smaller shaft pot in a larger hole?
Post by: hoodoo on November 07, 2014, 07:02:28 AM
Why f@#k about, go to ebay and buy the right one, fix it once and fix it right.  :)
Title: Re: using a smaller shaft pot in a larger hole?
Post by: alanp on November 07, 2014, 08:54:06 AM
And pay money?
Title: Re: using a smaller shaft pot in a larger hole?
Post by: hoodoo on November 07, 2014, 12:12:01 PM
 ;D Either that, or i'm sure Curtis could send you one, from one of the 100? plus guitars he's not currently playing at this very moment  ;)