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help! what size knobs do i need for lager pot shaft?

Discussion in 'Pickups & Electronics [BG]' started by maskedman72, Feb 1, 2013.

  1. maskedman72


    May 1, 2011
    hello, i just had new solid shaft pots put in my bass to replace the old split shaft pots i had and now my old knobs wont fit onto the new lager size shaft on the new pots.

    i have been to all my local music stores and no one has knobs to fit these new pots. (they are cts pots.)

    what is the shaft size on the larger pots?

    what size hole do the knobs need to have to fit the larger pots?

  2. AuntieBeeb


    Dec 12, 2010
    I had this problem myself a while ago. I don't know about your new pots specifically, but I think the problem is that some factories make them to imperial sizes and some to metric. (Generally if the pots were intended for a European supplier, they'll be metric, if US then imperial, but that's not necessarily true in every case.)

    I believe most pot shafts are either 1/4" or 6 mm...so whichever you've just put in, I'd guess your old knobs were the other!

    Edit: according to google, 1/4" = 6.35 mm. So I guess you must have had 6 mm pots in there originally, and you need a set of 1/4" knobs. Surprised to hear you're having trouble finding those stateside, I must say!
  3. maskedman72


    May 1, 2011
    still cant find these in 1/4inch black w/abalone top and with set screw at all, not even on the net.
  4. ctmullins

    ctmullins fueled by beer and coconut Supporting Member

    Apr 18, 2008
    MS Gulf Coast
    I'm highly opinionated and extremely self-assured
    A hand drill, a 1/4" drill bit, fifteen minutes, and you're all set.