XPost: sci.electronics.equipment
From: CFKinsey@military.org.jp
On Fri, 17 Jul 2020 13:15:24 +0100, Jasen Betts wrote:
> On 2020-07-16, Cydrome Leader wrote:
>> In sci.electronics.equipment Commander Kinsey
wrote:
>>> On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner wrote:
>>>
>>>> On 12/07/20 19:01, Pimpom wrote:
>>>>> On 7/12/2020 11:15 PM, Commander Kinsey wrote:
>>>>>> On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader
>>>>>> wrote:
>>>>>>
>>>>>>> In sci.electronics.equipment Pimpom wrote:
>>>>>
>>>>>>>> My mechanical slide caliper has a resolution of 0.001 inch. This
>>>>>>>> means that it can display measurements with a precision of 1 mil,
>>>>>>>
>>>>>>> What if your caliper had a resolution of 1 mil +/- 3 counts on the last
>>>>>>> digit?
>>>>> .............
>>>>>>
>>>>>> In America, what is a "mill"? In the UK, it used to mean a thousandth
of an
>>>>>> inch, but people use it to mean a millimetre nowadays.
>>>>>>
>>>>>
>>>>> It's not a mill. It's mil - single l. It means, and has always meant, a
>>>>> thousandth of an inch. It's not an Americanism.
>>>>
>>>> In the UK "mill" means millilitre.
>>>>
>>>> If you want to refer to fractions of an inch, then
>>>> it is /always/ "thou", i.e. thousandths of an inch.
>>>>
>>>> In the UK "mil/mill" /never/ means 0.001".
>>>
>>> Yes it does. My neighbour's a tradesman (in Scotland) and says
>>> "mill/mil" (I don't know which as they sound the same in speech) as
>>> shorthand for millimetre. As in "that kitchen unit is 600 mill wide".
>>> Since we don't use inches for such things in the UK, there's no
>>> confusion.
>>
>> The context there is key too. While I'd not measure a countertop or
>> whatever in millimeters, it would make no sense that anything in a kitchen
>> would be measured thicknesses of paper.
>>
>> We (in the US) use "guage" for wire and sheet metal. We also use "guage"
>> for measuring really thin stuff like plastic films. In the last case, it's
>> a completly different unit, but with proper context won't confuse anybody.
>
> sheet metal in mm (1.6mm, 0.65mm etc...)
> plastic sheet in microns 40um etc.
> electric wire in square mm.
> fencing wire in mm diameter.
Much more sensible. Guage is meaningless and is the wrong way round, higher
numbers are smaller!
>> Question for the metric woodworkers. Does anybody cut a piece of wood to
>> 317mm or 429mm or other off numbers when building a house or handing a
>> door or installing a countertop?
>
> Yes, if that is the right size. buildings are usually specified in
> multiples of 100mm. often multiples of 300mm or 1000mm
> furniture usually in multiples of 25mm
>
> Factory door sizes are 620mm + multiples of 50mm, but not all openings
> are the right size for the factory door.
There seems to be no standard for doors. You can order about 15 different
sizes in the UK, but never anywhere near the one you need.
> Timber sizes for dressed finger-jointed framing timber are accurate to
> withion 0.5mm are are certain preferred multiples of 5mm eg: 70x35 used
> mainly for non-structual walls. 90x45 used mainly for structural walls.
>
> The stud spacing and top-plate height will typically be some multiple
> of 50mm So a lot of the cutting for studs, and blocking is at multiples
> of 5mm. that's if you're not using pre-fabricated framing.
>
> Carpenters use millimeteres. they say centimeters
> are for tailors, and inches are for cobblers.
I use the most sensible denomination for the job. I won't say 600mm when I
could say 60cm. And I weigh myself in stone, not pounds.
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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