I'm keeping my pint of beer and if you want to fight about it be my guest, I'll take you on any day :-)

You're too timid to take anyone on unless you have a 2x4 in your hand :-)

@WK

14.333 x 7.833 = 112.270389 not 112.271

It all depends upon how many significant figures you want to work to. For all practical intents and purposes the answer is a nominal 112 whichever way you calculate it.

So try this one, calculate area of standard size unit of 1981 * 762 mm or in simoler terms 6' 6" * 2' 6"

It sounds too much like a building (shed?) where you would have internal dimension and external 'footprint? 14'4" isn't a standard measurement so would be rounded up to either 14'6" or 15'. 7'10" would be rounded up to 8ft. 15x8 =120 exterior, bit less inside (needs a smiley ;o) )

Using metric system in Britain was just a con to charge more per litre than was originally charged per gallon (and still is) Same applies to weights, sell in grams and some people think they are getting a deal. A kilo of flour, apples, whatever isn't 2-1/2 or 3lbs which is what the new price becomes
Damn French can keep their system. Pretty surprised America hasn't embraced it more, they have been using it since 1864 Act Of Congress

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I'm not a complete idiot, but, I'm working on it.
I have an opinion and I'm not afraid to use it

Thanks to the ISO standards most Companys are converting to metric. Not by choice either. When I worked at a UTC company many of the drawings were in metric and inch. The company I work for now has some wierd tolerances in inches.Someday when I have free moments I will hit the button on my calipers and see what the MM's are. I know the threads my machines make are in MM. We dont make to many inch threads any more.
Id rather go metric myself. Would make my life running a CNC easier. We have 3 differant drill sizes. Metric,Inch, And letter. So if you are out of stock on one you need to figure out which on e is closest to the one you need. Thank god for the Starret charts:)

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Old James

We can't change peoples believes in Politics. We can't change how people like to measure things, but at least in this one, we work with each other.

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Pluto will always be a planet to me.

Seti Ambassador
Not to late to order an Anni Shirt

We have 3 differant drill sizes. Metric,Inch, And letter. So if you are out of stock on one you need to figure out which on e is closest to the one you need. Thank god for the Starret charts:)

Nothing much changes then! As an apprentice toolmaker in the 1960's we also had imperial drill sizes in 64th of an inch and the letter sizes, we also had number drills, although metric drills were starting to come in. You most often found that the letter drills were for clearance holes whilst the number ones were for tapping drills. I can still remember that a 4BA thread needed a no.32 tapping drill, these days you would use a 3mm drill.

We used the Zeus data charts which they still publish today, the equivalent of the Starret ones. Starret themselves were the equivalent of our Moore & Wright.

Thats amazing that over 54 years later we still have to deal with the same problem:)
We are getting away from the letter drills. But yes they were used to open up a hole for final finish.Most of the parts I run we use a 1/4" drill to open it up and then run a micro bar to finish the dimemsion. And that dimension is held to +-.0005 of an inch. I love running parts that give me up to .002+-.

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Old James

When I was in the trade I could turn to 1/2 a thou and cylindrically grind to a tenth. We still had plugboard capstans in those days NC and CNC came in later. +/- 2 thou is a pretty easy tolerance to match in production batches. For holes we used reamers rather than microbars. And all the old hands had prized worn reamers that were perfect for press fitting dowels! We used to make precision machinery and a lot of our threads were 40tpi. Used in conjunction with a ferrule engraved with 50 divisions gave you 1 thou ajustment.

One of my favourite all time videos is the CNC m/c producing a finished V8 engine block from a single slab of metal. That was science fiction in the 60's!

Ive seen that video. Very impressive.

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Old James