This report presents an extensive set of machining data selected from six USAF Machinability Reports. Data are tabulated and arranged in formats including machining variables such as tool material, tool geometry, cutting fluid, depth, feed, and tool life end point. For each of the data lines, the relationship between tool life and cutting speed is expressed in at least three sets of data, thereby making it possible to optimize for maximum production or minimum cost. While these data are expected to be of considerable assistance in providing data for numerical control applications, they are also of great value in any type of machining situation involving the materials for which machining data are presented. Specifically, this report, the sixth of a series, pertains to tapping. The remaining report in this series will be issued separately as: Reaming (Report No. 66-1.7). Upon completion, all reports will be collected in a single volume (Report No. 66-1). The previous reports are Turning, No. 66-1.1; Face Milling, No. 66-1.2; Drilling, No. 66-1.3; Peripheral End Milling, No. 66-1.4; and End Mill Slotting, No. 66-1.5. (Author).

The United States now spends approximately $115 billion annually to perform its metal removal tasks using conventional machining technology. Of this total amount, about $14 billion is invested in the aerospace and associated industries. It becomes clear that metal removal technology is a very important candidate for rigorous investigation looking toward improvement of productivity within the manufacturing system. To aid in this endeavor, work has begun to establish a new scientific and technical base that will provide principles upon which manufacturing decisions may be based. One of the metal removal areas that has the potential for great economic advantages is high-speed machining and related technology. This text is concerned with discussions of ways in which high-speed machining systems can solve immediate problems of profiling, pocketing, slotting, sculpturing, facing, turning, drilling, and thin-walled sectioning. Benefits to many existing programs are provided by aiding in solving a current management production problem, that of efficiently removing large volumes of metal by chip removal. The injection of new high-rate metal removal techniques into conventional production procedures, which have remained basically unchanged for a century, presents a formidable systems problem, both technically and man agerially.The proper solution requires a sophisticated, difficult process whereby management-worker relationships are reassessed, age-old machine deSigns reevaluated, and a new vista of product/process planning and design admitted.

How to Find Out in Iron and Steel focuses on guides in conducting research on the manufacture and applications of iron and steel. The book first emphasizes the role of information services and libraries, literature guides, bibliographies, and periodicals in finding information on iron and steel. Topics include guides to sources of information; select lists of books and sources of information on books; and lists of periodicals. The manuscript then takes a look at the functions of periodical indexing and abstracting services in accessing information, including services dealing with science and technology; services solely focusing on iron and steel; and services dealing with the manufacture of iron and steel. The text also discusses the contributions of handbooks, dictionaries, monographs, treatises, textbooks, and standard works in conducting research on the two elements. English dictionaries that focus on a specific aspect of iron and steel technology, mechanical working, foundry practice, heat treatment, and mechanical properties and testing are underscored. The book also explains the different standards used in the manufacture and testing of iron and steel. The manuscript is a dependable reference for readers wanting to conduct research on the manufacture and applications of iron and steel.