[ARC5] Cost of sets - 1950 and 2010

[Kenneth G. Gordon]

On 24 Sep 2010 at 12:53, Leslie Smith wrote:

>  
> > "As far as I can tell, there are STILL no universally standardized metric threads and diameters."
> 
> You aren't serious?

Quite. 

Come to the U.S. and take a close look at metric threads in use 
here. It has been a nightmare for the auto industry, among others. 
Furthermore, since the U.S. imports everything now, the plethora 
of DIFFERENT metric threads has compounded the problem. 

Possibly in Oz that has never been a problem, but it sure as heck 
has been here!!!!!!

When I mentioned the Italian rapier with metric diameter and 
turns-per-inch, I was not kidding: I was speaking from experience.

Also, as mentioned here, the Japanese version of metric totally 
fouls up their circuit boards as far as "standard" is concerned.

I did not say that metric measurements were not far more logical 
and much easier to use than English/Imperial: what I said was 
that the latter have been actually, really, truly standardized for at 
least two centuries (I had forgotten that the 20th century is past), 
while, in the present world, due mainly to the European equivalent 
of "not invented here" metric threads have not been standardized 
yet.

Oz might be different...

As another example, I have never heard of "metric coarse", and 
although I am a VERY amateur machinist, I have had SOME 
experience in dealing with metric threads!!

Ken Gordon W7EKB