Kirk Wallace wrote: > On Tue, 2009-05-12 at 14:21 -0400, Douglas Pollard wrote: > >> Kirk Wallace wrote: >> >>> 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 >>>> > ...snip > >> My 1974, 19th Edition, Machinerys handbook, has British metric >> standards but they may be different. Their threads are. Seems everyone >> wanted to go metric, but they just wanted their own metric standards. >> > > I cruised Amazon.com, they have the 28th Edition for $66. It would > probably the best CNC dollars I could spend. They appear to offer a > limited number of any pages in the book as a preview, so I get a good > start there. It's funny that eBay 28th Edition prices are much higher. > > I think a gear designer would be a great cloud computing application. > Most likely the info you want is in the 28th edition. Fully 90 % of the info you will need in the coming years is in the edition you have. I don't know where to tell you to look but the metric gear info is out there somewhere for little or no money. As to the Machinerys hand book my father had ,I think, the 6th edition , my older brother had the 11th About 1939. and my first one was the 13th edition about 1958 they all had mostly the same info though there were additions and deletions as new things came along and old ones became obsolete. My brothers son now is the proud owner of all three editions he is also a machinist. What ever you do keep the old book. I call my nephew from time to time and ask him to look up something in the old books. Doug
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