Autobot22 Posted May 9, 2019 Share Posted May 9, 2019 Hi all recently a tone knob fell off one of the pots on my SR1300 and was lost. I ordered a replacement set from EBay and was disappointed to find they wouldn’t fit on the shaft. The holes are slight too small for the shaft.. Not having any calliper or means of measuring the shaft diameter I had to guess what should be the correct size and after some perusal of Amazon and eBay I concluded that there are two sizes of knob, I had bought the smaller one and therefore I now ordered what I thought would be the larger,correct size. Dear Reader, imagine my surprise when I discovered that these new knobs were also too small! Now I have a quite a collection of knobs but still none that fit. Do Ibanez bass guitars have an unusual pot shaft size? Can anyone tell me what size or type I need to order? Quote Link to comment Share on other sites More sharing options...
ped Posted May 9, 2019 Share Posted May 9, 2019 I bet you ordered 6mm shaft sized pots but the actual shafts are 6.35mm or 1/4” Quote Link to comment Share on other sites More sharing options...
Jabba_the_gut Posted May 9, 2019 Share Posted May 9, 2019 Are they this style? One's 15mm diameter the other 20mm diameter. I bought these from Maplin about 25 years ago!! They are for a 1/4" (6.35mm) shaft. Let me know if you are having difficulty sourcing them. Quote Link to comment Share on other sites More sharing options...
Grangur Posted May 10, 2019 Share Posted May 10, 2019 To know the size of the shaft, get a vernier . I hate Ama... but at less than £3 inc postage, you can't go wrong. Quote Link to comment Share on other sites More sharing options...
Autobot22 Posted May 10, 2019 Author Share Posted May 10, 2019 22 hours ago, ped said: I bet you ordered 6mm shaft sized pots but the actual shafts are 6.35mm or 1/4” I think you could be right! Not easy to measure with a cheap plastic ruler but this is what they look like, with the lonely tone pot missing its embellishment. 21 hours ago, Jabba_the_gut said: Are they this style? One's 15mm diameter the other 20mm diameter. I bought these from Maplin about 25 years ago!! They are for a 1/4" (6.35mm) shaft. Let me know if you are having difficulty sourcing them. I think the diameter of the knobs I’ve bought are more like 17 or 18mm. The bass and treble tone pot knobs on the Ibanez are about 13mm diameter. Quote Link to comment Share on other sites More sharing options...
Jabba_the_gut Posted May 10, 2019 Share Posted May 10, 2019 (edited) 14 minutes ago, Autobot22 said: I think the diameter of the knobs I’ve bought are more like 17 or 18mm. The bass and treble tone pot knobs on the Ibanez are about 13mm diameter. The knurled knobs you have in your picture next to the ruler look like they are designed for a splined shaft like this CTS pot: Whereas the shaft on your bass is a solid type (which come in 6mm or 6.35mm diameter). Can you take off one of the other knobs of the same size and measure the diameter and I'll have a search.. Edited May 10, 2019 by Jabba_the_gut Quote Link to comment Share on other sites More sharing options...
Autobot22 Posted May 10, 2019 Author Share Posted May 10, 2019 23 minutes ago, Jabba_the_gut said: The knurled knobs you have in your picture next to the ruler look like they are designed for a splined shaft like this CTS pot: Whereas the shaft on your bass is a solid type (which come in 6mm or 6.35mm diameter). Can you take off one of the other knobs of the same size and measure the diameter and I'll have a search.. The other tone pot knobs are 12-13 mm in diameter and you are absolutely right - they don’t have a spline fit. Any help would be highly appreciated because I have just spent 25 minutes on the inter web with no luck finding 1/4 inch black knobs in any diameter let alone 12 or 13 mm. Quote Link to comment Share on other sites More sharing options...
Jabba_the_gut Posted May 10, 2019 Share Posted May 10, 2019 8 minutes ago, Autobot22 said: The other tone pot knobs are 12-13 mm in diameter and you are absolutely right - they don’t have a spline fit. Any help would be highly appreciated because I have just spent 25 minutes on the inter web with no luck finding 1/4 inch black knobs in any diameter let alone 12 or 13 mm. Drop me a pm and I'll send one of the small knobs to you. Quote Link to comment Share on other sites More sharing options...
Autobot22 Posted May 10, 2019 Author Share Posted May 10, 2019 Thanks a million! I’ve sent you a PM Quote Link to comment Share on other sites More sharing options...
Kev Posted May 11, 2019 Share Posted May 11, 2019 If you need to shift some black dome 6mm knobs as a result of this shoot me a pm, I need some! Quote Link to comment Share on other sites More sharing options...
gary mac Posted May 11, 2019 Share Posted May 11, 2019 This is a good knob resource https://blog.philadelphialuthiertools.com/2013/05/16/choosing-the-correct-knob-for-your-guitar-or-bass/ 1 1 Quote Link to comment Share on other sites More sharing options...
KiOgon Posted May 11, 2019 Share Posted May 11, 2019 (edited) 49 minutes ago, gary mac said: This is a good knob resource https://blog.philadelphialuthiertools.com/2013/05/16/choosing-the-correct-knob-for-your-guitar-or-bass/ Cheerz Gary, almost all you ever need to know about knobs in one place! Edited May 11, 2019 by KiOgon Quote Link to comment Share on other sites More sharing options...
gary mac Posted May 11, 2019 Share Posted May 11, 2019 2 minutes ago, KiOgon said: Cheerz Gary, almost all you ever need to know about knobs in one place! Need to clear my search history now, after searching for "All you need to know about knobs" Quote Link to comment Share on other sites More sharing options...
Jabba_the_gut Posted May 11, 2019 Share Posted May 11, 2019 Knob posted. Quote Link to comment Share on other sites More sharing options...
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