Machinerys handbook

The editors would like to acknowledge all those who contributed ideas, suggestions, and
criticisms concerning the Handbook.
Most importantly, we thank the readers who have contacted us withsuggestions for new
topics to present in this edition of the Handbook. We are grateful for your continuing constructive
suggestions and criticisms with regard to Handbook topics and presentation.
Yourcomments for this edition, as well as past and future ones are invaluable, and well
appreciated.
Special thanks are also extended to current and former members of our staff, the talented
engineers,recent-graduates, who performed much of the fact checking, calculations, artwork,
and standards verification involved in preparing the printed and CD-ROM editions
of the Handbook.
Many thanks toJanet Romano for her great Handbook cover designs. Her printing, packaging,
and production expertise are irreplacable, continuing the long tradition of Handbook
quality and ruggedness.
Many of theAmerican National Standards Institute (ANSI) Standards that deal with
mechanical engineering, extracts from which are included in the Handbook, are published
by the American Society of MechanicalEngineers (ASME), and we are grateful for their
permission to quote extracts and to update the information contained in the standards,
based on the revisions regularly carried out by the ASME.
ANSIStandards are copyrighted by the publisher. Information regarding current editions
of any of these Standards can be obtained from ASME International, Three Park Avenue,
New York, NY 10016, or bycontacting the American National Standards Institute,
West 42nd Street, New York, NY 10017, from whom current copies may be purchased.
Additional information concerning Standards nomenclature and otherStandards bodies
that may be of interest is located on page 2079.
Several individuals in particular, contributed substantial amounts of time and information
to this edition.
Mr. David Belforte, for...