[time-nuts] metric / English

Rob Kimberley robkimberley at btinternet.com
Fri Dec 16 12:33:41 EST 2011


With a metric tap & die set?
:-)

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Brooke Clarke
Sent: 16 December 2011 16:48
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] metric / English

Hi Don:

Sure converting lengths is easy and I have metric, English and weird taps
and dies, but how do you turn metric threads?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html


Don Couch wrote:
> The idea that conversion to metric would require replacing all of the
machine tools (lathes, mills, etc) is a myth. Any U.S. machine shop has
walls and toolboxes covered in conversion charts, converting drill, screw,
wire, sheet sizes from one crazy measurement to another. One single
additonal conversion chart, inch to metric, and you can keep using your inch
machines on metric projects.
>
> My mill has inch lead screws. I added a low cost digital readout with a
little button to show inch or millimeter movements, and now I do everything
in metric. No problem.
>
> Don Couch
>
> --- On Thu, 12/15/11, Dan Kemppainen<dan at irtelemetrics.com>  wrote:
>
>> From: Dan Kemppainen<dan at irtelemetrics.com>
>> Subject: Re: [time-nuts] time-nuts Digest, Vol 89, Issue 51
>> To: time-nuts at febo.com
>> Date: Thursday, December 15, 2011, 10:29 AM
>>
>> On 12/14/2011 3:59 PM, time-nuts-request at febo.com
>> wrote:
>>> It's not like metric is totally absent.  We drink
>> 2 liter cokes and defend
>>> ourselves with 9mm pistols.   Our cars
>> use mostly metric parts.  Even ham
>>> radio operators, arguably the most jingoistic and set
>> in the past bunch
>>> around, get on the 80, 40, and 20 METER bands.
>> I agree with you, and funnily enough the rest of the NATO world uses 
>> 7.62mm and 5.56mm rifles. (Both were originally based on standard 
>> inch sized rifle cartridges designed in the US)
>>
>> The problem in converting to metric would require replacing a lot of 
>> tools. For example Mills, lathes, and other machining tools and 
>> measurement devices are expensive, and last for decades. I doubt many 
>> of the small tool shops around here could afford it.It's a great idea 
>> to standardize in theory, but in practice it becomes difficult. Maybe 
>> the whole world should standardize our language. We could all switch 
>> to Spanish or Latin or Chinese to speak with so we could all talk 
>> with each other. That would probably be more helpful to me on a daily 
>> basis, than having to switch measurement systems.
>>
>> While we're on the subject, let me throw time back into the mix. We 
>> use months and days for scheduling projects.
>> Meanwhile some of our counterparts use calendar weeks. This is much 
>> more difficult to convert between than inch and mm.
>> When is CW 36???
>>
>> There I threw some wood on the fire too!
>>
>> Dan
>>
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