| New standards, dimensional and operat- ing data, tolerances, recommendations, ap- plications and new tables appear in 13 subject areas. For example, the Cutting Speeds and Feeds section is completely re- vised and expanded in 20 subjects, and in- cludes over 30 new tables for the machining of metals and alloys. Likewise, complete revision and expansion occur in sections on spur gears, tool steels and grinding, while new standards and data are added to 9 other sec tions. The 19th Edition of this standard refer-ence work for the mechanical industries recognizes the world-wide move towards theuse of the metric System International. Asthe world goes in this area, so will the Hznd-book. Th~ 19th Edition includes consider-able metric data based on SI units, as wellas British Standards based mainly on ISORecommendations. Much of the Hand-book s information is of course independentof measurement units, or can be used withmetric or English units. An invaluable aid and working tool wher-ever anything mechanical is designed orconstructed, this world-renowned bookmakes available in clear, concise, ready-to-use form the new and hard-to-get as wellas the established standard data and in-formation needed by machine designers,mechanical engineers, tool designers, shopmanagement, skilled mechanics, engineer- |
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