Présentation de l'éditeur
In the preparation of this book on automatic screw machines and their tool equipment, we have endeavored to embody material which will constitute a comprehensive treatise for tool designers, toolmakers, and machine operators. The subject-matter of the book divides naturally into two sections, one devoted to various types of machines and their construction, general tool equipments, methods of camming, etc.; the other dealing with tools in detail, and containing specific information on making and using these tools, the speeds and feeds at which they should be operated, and other particulars which it is hoped may be of service to mechanics connected with screw machine work. The chapters on camming and on different types of cutting tools were prepared originally for publication in the columns of the American Machinist; they are here arranged in somewhat more convenient form for reference. It I vill be noted that inS ection I a number of machines are included which, strictly speaking, are of the chucking machine type and semiautomatic in their operation, the chucking of the work being accomplished by hand. A side from this feature, they are, broadly considered, similar in principle to the full automatic machines, although their capacity and the method of holding the material adapt them to the machining of a heavier or otherwise different class of work from that usually produced on automatics working entirely from bar stock or on castings and forgings fed to the chuck by means of magazines. We recognize the fact that the name automatic screw machine is hardly broad enough for the designation of a machine which can produce from the bar, from castings or from forgings, almost any symmetrical piece that may fall within the capacity of the chuck and turret traverse. However, the purpose for which this type of machine was originally conceived, naturally determined its
(Typographical errors above are due to OCR software and don't occur in the book.)
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