This section is from the book "Applied Science For Metal Workers", by William H. Dooley. Also available from Amazon: Applied Science For Metal Workers.
Line-shafting which is to encounter much shock and sudden variations of load must be coupled with what are known as flange couplings. The distance between the hangers must be regulated by the number of pulleys on the shaft. If the number is large the hangers must be closer together.
 
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