Machining/Welding Information

Your tax dollars at work!  While searching for machining textbooks, I found a page with a few links to public-domain works by the U.S. military:

• US Army Fundamentals of Machine Tools
• US Army Welding Theory and Application
• US Navy Machinery Repairman Handbook

The comments have additional links as well.

I also came across a reference site called "Virtual Machine Shop" that has some useful information and diagrams.