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This book explores the geometric and kinematic design of various types of gears most commonly used in practical applications, while also considering the main problems involved in their cutting processes. Cylindrical spur and helical gears are first considered, and their main geometric quantities are determined with regard to interference and undercut problems, as well as related kinematic parameters. Particular attention is paid to the profile shift in these types of gears, produced by either a rack-type cutter or pinion-rack cutter. Among other things, profile-shifted toothing makes it possible to obtain teeth shapes that are stronger and offer more balanced specific sliding, and to reduce the number of teeth below the minimum normally required to avoid operating interference or undercut. In turn, these essential aspects of the geometric-kinematic design of cylindrical spur and helical gears are generalized and extended to the other types of gear examined, such as: straight bevel gears, crossed helical gears, worm gears, spiral bevel and hypoid gears. In closing, ordinary gear trains, planetary gear trains and face gear drives are discussed.
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