SKF Bearing failures and their causes
http://dl.dropbox.com/u/25030954/Blog/Bearing%20failures%20and%20their%20causes%20-%20SKF%20reference.pdf
SKF Enveloping
http://dl.dropbox.com/u/25030954/Blog/Enveloped%20%28gE%29%20Accel%20Overall%20Severity%20Levels.JPG
pulley belts
http://dl.dropbox.com/u/25030954/Blog/Installation%20and%20operation%20of%20belt%20drives.pdf
ISO 10816-3
http://dl.dropbox.com/u/25030954/Blog/ISO%2010816-3.jpg
Prufectnik Shock Pulse
