Originally Posted by wildemere
Read this online book about chain technology.
Table of Contents
Then you will understand everything there is to know about chain drive.
Things like its wear characteristics , lube requirements, tension settings, noise, vibration, chordal harmonics and construction.
After reading such an engineering document, all will be clear.
Thanks, wildemere, I found the answers in Chapters 2.2.4 and 7.2.4.