Roller Bearing Institute's  "Bearing Life Improvement" textbook details the how and why of bearing failure and how to increase and prolong bearing life, covers all factors of load, speed, lubrication, damage from contaminants and overloading, etc.  Free First Class shipping in USA, foreign buyers pay first class postage for 3 ounces.  Guaranteed to be as stated.   Note to foreign buyers, free shipping via email, file will be cut to smaller packets so it can email, you can reassemble or just keep the segmented files.  Please email before buying if you desire email delivery.

All CD's go Media Mail