Hi Michael, Have a look at:
http://www.pcblibraries.com/downloads/files/Mounting%20Holes.zip I have already drawn some of them as pcb footprints (MTG300_*.fp .. MTG470_*.fp). If you want them, just say yes. Kind regards, Bert Timmerman -----Oorspronkelijk bericht----- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Michael Sokolov Verzonden: dinsdag 16 oktober 2007 23:15 Aan: geda-user@moria.seul.org Onderwerp: gEDA-user: PCB mounting holes for metric screws Hello fellow gEDA/pcb users, I've got a PCB mechanical design question. I have given up on the idea of copying the form factor of EN routers (basically I don't really like that form factor) and I'm going for a form factor of my own. However, being a proud citizen of the Union of Soviet Socialist Republics, I want to make my form factor all metric -- the Soviet national standards body required that for all new designs and my own sense of taste does the same. :-) I've speced my board dimensions in metric (130x165 mm) and I'll have mounting holes for metric screws, some M3 and some M4. My question is about the latter: I've been told that the drill diameter should be 3.1 mm for an M3-accommodating PCB hole and 4.2 mm for an M4-accommodating one; is this correct? But what about the copper annulus? What would be a good copper annulus for those screw-accommodating holes? Assume the "typical" kind of screw used to secure PCBs to enclosures. TIA, MS _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user