On Sat, 2009-05-09 at 11:45 -0700, Kirk Wallace wrote: > I would like to make gears, but I need to know the tooth shape in order > to make a form tool or cut an outline. This is what I came up with, if > there are any mistakes or bad assumptions, please let me know. > > I referenced: > http://en.wikipedia.org/wiki/Gear > http://en.wikipedia.org/wiki/Involute_gear > http://en.wikipedia.org/wiki/Involute > http://en.wikipedia.org/wiki/Rack_and_pinion > > My example gear is a 2m(module) pitch - 20mm. > > A sample is on this page: > http://www.qtcgears.com/RFQ/default.asp?Page=../KHK/newgears/KHK044.html > (Short URL) http://alturl.com/whp2 > > Pitch is the tooth length, but expressed in pitch circle diameter, so a ... snip
Dooh, I've had my Dad's Machinery's Handbook for almost twenty years and it hadn't occurred to me until now to see if there is any gear information it. It seems to cover everything I've been trying to hash out the last few days, including the ANSI 20 degree rack form. The gearing section is about four hundred pages, fortunately, about ten or fifteen cover what I need. One problem is my 1971 edition doesn't cover metric gears, so if anyone has any leads to the metric standards, I'd appreciate hearing from you. I suppose I could just buy a current edition. I found another interesting link here: http://science.howstuffworks.com/gear8.htm -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
