Which ones? Some time ago I was setting up to turn a Metric and discovered that there where a Japanese Metric standard for the thread as well as a German Metric standard both of which where slightly different from the "standard" Metric threadd that was I wanted to cut.
Cheers, Graham ve3gtc -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke Sent: December 16, 2011 11:49 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<d...@irtelemetrics.com> wrote: > >> From: Dan Kemppainen<d...@irtelemetrics.com> >> Subject: Re: [time-nuts] time-nuts Digest, Vol 89, Issue 51 >> To: time-nuts@febo.com >> Date: Thursday, December 15, 2011, 10:29 AM >> >> On 12/14/2011 3:59 PM, time-nuts-requ...@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 >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
