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bsa500
Joined: 23 May 2013
Posts: 103
Location: Tonbridge Kent.UK
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 Posted: Thu Feb 11, 2016 1:51 pm Post subject: Smiths 'N' clock thread size |
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Hi,
I have a very nice and fully working Smiths wind up car clock. It has an N on the front face I hope for id. I will be fitting this to my BSA along side the speedo, I know pretty cool, but the mounting studs are missing. My question is can you buy these studs from a shop/dealer(not seen any on ebay) or does anyone know the thread size so I can make up some studs etc.
thanks in advance Andy |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4104
Location: South Cheshire
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| Posted: Thu Feb 11, 2016 3:55 pm Post subject: |
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Most smiths instruments used BA threads, studding is readily available from model suppliers.
Cheers
Dave |
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bsa500
Joined: 23 May 2013
Posts: 103
Location: Tonbridge Kent.UK
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| Posted: Thu Feb 11, 2016 3:59 pm Post subject: |
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Dave,
Thanks for that the model suppliers also do the smaller bolts which may work out a better option. I think from delving around the net the studs are 3BA? |
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MVPeters
Joined: 28 Aug 2008
Posts: 822
Location: Northern MA, USA
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| Posted: Thu Feb 11, 2016 9:56 pm Post subject: |
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You may struggle to find 3BA. 2 4 6 & 8 are the common ones.
Model shops generally sell packets in longer lengths in most sizes & you cut to the length you need.
Try www.expotools.com - includes a map of stockists.
or www.modern-screws.co.uk (Not working today - try 01 322 553224)
_________________
Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
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Keith D
Joined: 16 Oct 2008
Posts: 1129
Location: Upper Swan, Western Australia
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| Posted: Fri Feb 12, 2016 6:08 am Post subject: |
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Remembering back to my apprenticeship days in the UK..... Even number BA threads were in general use. I believe odd number BA threads were used in the electrical industry. That would need checking as my memory is certainly not fool proof!
Keith |
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ukdave2002
Joined: 23 Nov 2007
Posts: 4104
Location: South Cheshire
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| Posted: Fri Feb 12, 2016 9:56 am Post subject: |
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| Keith D wrote: | Remembering back to my apprenticeship days in the UK..... Even number BA threads were in general use. I believe odd number BA threads were used in the electrical industry. That would need checking as my memory is certainly not fool proof!
Keith |
You are right, just about everything Lucas or Smiths that had a thread would have a BA thread, until they went metric...although you could argue that BA threads are metric 
Dave |
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baconsdozen
Joined: 03 Dec 2007
Posts: 1119
Location: Under the car.
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| Posted: Sun Mar 06, 2016 11:54 am Post subject: |
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Recently I found some pre second world war engineering manuals when clearing out my loft. They make interesting reading,hardly a mention of metric but pages of different thread patterns that the engineer was likely to come across in those days. Many have all but vanished,cycle thread,acme,Briggs standard,dardelet and others all have their own sections,even Cadillac had their own thread form.
One manual alone is over 2000 pages and the index (in quite small print) is sixty pages long.
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Thirty years selling imperial hand tools for old machinery(Now happily retired). |
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peter scott
Joined: 18 Dec 2007
Posts: 7118
Location: Edinburgh
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| Posted: Sun Mar 06, 2016 12:02 pm Post subject: |
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Everything on my car is BSF except for the tappet adjusters. They use a cycle thread for better precision.
Peter
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http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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