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jbmeyer13
Joined: 03 Dec 2010
Posts: 1135
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| Posted: Mon Aug 29, 2016 6:28 pm Post subject: Marquee feet metric or standard |
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What is the size of the threaded marquee feet? I need to source some bolts for a ceiling mount and I thought it was 3/8' but Nash is telling me he thinks it's metric. Tim? Curt?
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Aug 29, 2016 7:22 pm Post subject: |
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3/8"-16 English coarse thread
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jbmeyer13
Joined: 03 Dec 2010
Posts: 1135
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| Posted: Mon Aug 29, 2016 7:25 pm Post subject: |
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| draganm wrote: | | 3/8"-16 English coarse thread |
Thx Drags
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Wed Aug 31, 2016 11:24 pm Post subject: |
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Of course the Marquee feet are standard.
If they were metric, we wouldn't call them feet, would we? 
So while an American stands on his own two feet, what do the British stand on? 
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Thu Sep 01, 2016 5:15 pm Post subject: |
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| cmjohnson wrote: | Of course the Marquee feet are standard.
If they were metric, we wouldn't call them feet, would we?
So while an American stands on his own two feet, what do the British stand on? |
the feet/inches system is English CJ, and I don't know if or when the UK might have switched to the metric system but I think they have made the transition.
I have the option to use any bolts and create any type of threads I want, but I like the standard English threads because you get a coarse, and very coarse option which is perfect on soft material like plastic. With Metric, the only kinds of threads they have for plastic parts is stripped out ones .
Anyone who thinks a 1/4"-20 bolt is complicated however should try Whitworth threads 
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Sep 01, 2016 5:28 pm Post subject: |
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Ah, Whitworth threads...the THIRD standard, pretty much unique to the British and generally found only on early 20th century British products.
Glad we don't have to deal with THREE systems.
Personally I think there should be not more than a dozen universally standardized thread sizes. 10 or 12 carefully selected thread sizes should
be sufficient to cover the range of needs from a watchmaker to construction of large suspension bridges.
Metric is supposed to be simple. And it IS, but for the confusing array of options available in it. The English standard generally provides for up to three thread pitches for a given root diameter, in NC, NF, and NEF categories. That should be sufficient. But in metric thread sizes, you can choose more than that in some root diameters.
I forget how many possible and produced thread size combinations there are in metric between 1mm and 10mm diameters with all the various pitch choices there are, but it's a lot. TOO many.
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