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| 8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc |
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21-03-11, 08:54 AM
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Looking for rotary switch knobs to suit a 411 dash
Having installed an air con system on my 411, the original rotary heater controls are now redundant, so I have set about intergrating the air con controls in the dash, instead of using the tacky add-on panel that came with the VintageAir AC system.
I have rotary temperature and mode controls but the original switch knobs from the Bristol do not fit the D shaped shafts on the new switches. Does anyone know where I can get rotary switch knobs to suit a 411 dash? the attached pictures show the old control and knob alongside the new switch, plus another view of the knob I want to replace. So I'm looking for something similar that fits the new switch. 
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21-03-11, 02:11 PM
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If you can't find anything suitable, you could possibly modify the original knob to work with the new shaft. Assuming that the new knob has a metal "D" ring embedded in the plastic. You could retrieve the "D" ring and install it in the old knob using epoxy. I've done similar fixes in the past. The issue is how much force is required to turn the new switch. If it requires too much force the modification might fail after a while.
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21-03-11, 05:40 PM
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That is the reason for my question, about the relative sizes of the shafts. New shaf smaller - remove ring or if no ring, clean inside with a burr, get some 2-component hard filler (I would use Cold cure Acrylic) , put some vaseline on shaft, put knob on shaft, let harden, remove, remove excess, etc etc.
It is easy.
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21-03-11, 10:05 PM
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Thanks for the responses.
The new switch shaft diameter (D shaped, max 6.35mm) is smaller than the old one and a different shape - the old shaft is hexagon shaped. Unfortunately the new switch shaft is also considerably shorter than the old one. I don't have any D ring clips, but I don't really think embedding a clip in the old knob would hold for very long, because the mode switch is quite stiff. My preference would be for metal knobs with a grub screw which could provide a very solid fixing.
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21-03-11, 10:34 PM
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I have A/C control knobs from a 603 or the plastic Bakelite one for the wipers on an earlier V8 if any use. Or maybe some round chromy ones from a Radiomobile radio !
So I have quite a few knobs and like Janne mentioned , you could even put Vaseline on my knob if you want !!
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21-03-11, 11:57 PM
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Quote:
RS Components appear to have something reasonable. RS | Hardware | Knobs, Levers, Handles and Handwheels | Knobs | Round-Knobs They're not metal, but then nor were the original ones.
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09-11-13, 07:32 PM
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Dash knobs
Hi can some let me know if the dash knob fits Bristil cars see photo of the parts I make the knobs and must fit lots of cars?
https://www.facebook.com/photo.php?f...type=1&theater https://www.facebook.com/photo.php?f...e=1&permPage=1 https://www.facebook.com/photo.php?f...e=1&permPage=1 Regards Ashley Hinton Last edited by ashley hinton; 09-11-13 at 07:37 PM.
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11-11-13, 01:40 AM
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Quote:
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11-11-13, 11:16 PM
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Just the panel light and wiper switch light would be of use to Bristol owners - non of the others.
I wouldn't of thought that it's worth making tooling for the 6 or 8 cylinder of the type you have and the rest (V8 electric window switches and same style other switches ) seem to be covered by other Marques -- although the engraving on the switches to the Bristol style would be useful ! Electric window switches available new are plain... Last edited by GREG; 12-11-13 at 12:26 AM.
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