This manual is presented as a guide in solving
problems associated with drive shafts. No attempt has
been made to discuss technical consideration of design
or theory of vibrating systems.
In discussing installation of drive shafts, no hard and
fast rule or fine dividing line has been drawn between
satisfactory and unsatisfactory operation.
The limits set forth in this manual correspond with
our own standards. Our long experience in the
installation of drive shafts has proven these standards to
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