Dave, funny thing is that European lathes in those days you were describing, many still working today, were equipped with inch lead screws, so that in order to cut mm threads they have to use a 127 teeth gear in the gear case to drive the lead screw. This way, our industry wanted to become compatible with the British and American manufacturers for export.... And although we are using metric units here in Germany since the late 1880ies, we still buy heating and water pipes, fittings etc. in inch measures..... When I sometimes bring my timber to be cut to our local sawmill, I specify 3/4 inch or one inch boards to be made out of it, although they will be measured as 20 or 25 mm boards. By the way, how come that in this mailing list everybody speaks in inches - you were writing about the metric revolution?
Peter Dave schrieb: > I was in engineering college from 76 to 81 and remember some discussion > about this. Fortunately there was not too much to discuss > as they had already decided that SI was the way to go and we had > recently selected "new" books. At the same time the "metric" > revolution was in full swing and they were changing out all of their > machine tools in the school shop so they > would all be metric. They were removing manual machines that were > setup in inches and replacing them with machines setup in millimeters. > Many of the machines were old so I was happy to see them go and be > replaced with new machines. > The school was very unique in that they encouraged students to use the > machines and the facilities after hours. They had a shop supervisor who > was paid to stay late most weekday nights. Even the garage was > available, so we could put our cars on the lifts to do repairs and > modifications. When I wasn't chasing girls, I "lived" at school. :-) > > Dave > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
