[aldaeron]

The "old one" I have is Kent's Mechanical Engineers Handbook. The copy gifted to me by my first boss is the 12th Edition (1950). It is a good reference, but not an exiting read cover to cover. It has a section on gearing stress and fasteners and many other mechanical things.

A "more modern" design book would be Mechanical Engineering Design by Shigley and Mischke. Those two have a ton of editions of mechanical design. Thanks to indecisive profs I have both the 4th and 6th editions. They are now on the 9th edition according to Amazon. Again, not a cover to cover read, but this book has a section on gearing stress and fasteners.

I caution you that these are 3rd or 4th year collegiate level texts. There are a lot of support classes that will help these equations make a lot more sense (statics, strength of materials, etc). Reading them cold could be very difficult.

-matto-