You use the change gears in a ratio of 127:50 (254:100) -John
============== > 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<[email protected]> wrote: >> >>> From: Dan Kemppainen<[email protected]> >>> Subject: Re: [time-nuts] time-nuts Digest, Vol 89, Issue 51 >>> To: [email protected] >>> Date: Thursday, December 15, 2011, 10:29 AM >>> >>> On 12/14/2011 3:59 PM, [email protected] >>> 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 -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
