American Gear Manufacturers Association Research Articles

An Analysis of Factors Used for Strength Rating Helical Gears

This paper discusses the factors used to rate the strength of helical-gear teeth by means of the fundamental tooth-strength formula developed by the American Gear Manufacturers Association’s Gear Rating Committee. The new approach combines different concepts of geometry factors, an improved evaluation of dynamic loads, rational allowable stresses, and risk or reliability considered as a statistical probability. In addition, the inclusion of the effect of operating error and load-distributing tooth flexibility provides the gear engineer with a more accurate means for helical-gear strength rating.

THE NAVAL ENGINEER—HIS PLACE IN THE POLITICAL ECONOMY

THE NAVAL ENGINEER—HIS PLACE IN THE POLITICAL ECONOMY

THE COLLAPSE OF TIME

Journal of the American Society for Naval EngineersVolume 69, Issue 4 p. 617-622 THE COLLAPSE OF TIME J. LEWIS POWELL, J. LEWIS POWELL THE AUTHOR is on the staff of the Assistant Secretary of Defense (Supply & Logistics). His principal responsibility is monitoring the Industrial Mobilization Planning. This activity deals with the principal means by which the Army, Navy, and Air Force plan with American industry for the production of military items in the event of war. Mr. Powell is a graduate mechanical and aeronautical engineer, and has worked both in private industry and in the government. During World War II, he served first as a civilian with the War Production Board, and later as a Naval Officer attached to the executive office of the Secretary of the Navy. In both assignments he did management trouble-shooting in the field of industrial mobilization, on a nationwide basis. Shortly after the outbreak of Korea, Mr. Powell was recalled to Washington to again work in the field of industrial mobilization. He is active in the Naval Reserve, holding the rank of Commander. Mr. Powell is a nationally recognized authority in the field of industrial mobilization, and is known both as a speaker and writer. Mr. Powell is the author of the following articles: “Battle Stations for Industry,” “Gearing Industry to National Defense,” “The Hook-Up for Industrial Logistics,” “Stockpiling Know-How,” “Stampede of Progress.” During the past year, Mr. Powell has been a principal speaker at numerous industrial meetings throughout the United States. He is best known for this dynamic talk which was presented at the annual meeting of The American Gear Manufacturers Association at Hot Springs, Arkansas, on 3 June 1957.Search for more papers by this author J. LEWIS POWELL, J. LEWIS POWELL THE AUTHOR is on the staff of the Assistant Secretary of Defense (Supply & Logistics). His principal responsibility is monitoring the Industrial Mobilization Planning. This activity deals with the principal means by which the Army, Navy, and Air Force plan with American industry for the production of military items in the event of war. Mr. Powell is a graduate mechanical and aeronautical engineer, and has worked both in private industry and in the government. During World War II, he served first as a civilian with the War Production Board, and later as a Naval Officer attached to the executive office of the Secretary of the Navy. In both assignments he did management trouble-shooting in the field of industrial mobilization, on a nationwide basis. Shortly after the outbreak of Korea, Mr. Powell was recalled to Washington to again work in the field of industrial mobilization. He is active in the Naval Reserve, holding the rank of Commander. Mr. Powell is a nationally recognized authority in the field of industrial mobilization, and is known both as a speaker and writer. Mr. Powell is the author of the following articles: “Battle Stations for Industry,” “Gearing Industry to National Defense,” “The Hook-Up for Industrial Logistics,” “Stockpiling Know-How,” “Stampede of Progress.” During the past year, Mr. Powell has been a principal speaker at numerous industrial meetings throughout the United States. He is best known for this dynamic talk which was presented at the annual meeting of The American Gear Manufacturers Association at Hot Springs, Arkansas, on 3 June 1957.Search for more papers by this author First published: November 1957 https://doi.org/10.1111/j.1559-3584.1957.tb03240.x AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume69, Issue4November 1957Pages 617-622 RelatedInformation

THE NEED FOR

IN considering the properties possessed by lubricating oils priority is generally given to viscosity which is not only a most important criterion of performance but can be measured easily and expressed quantitatively. This is reflected in the systems agreed by such groups as the (American) Society of Automotive Engineers (S.A.E.), the American Gear Manufacturers' Association (A.G.M.A.) and so on. Those who have been associated with the selection and application of lubricants will no doubt have been confused by the various systems which classify viscosity for only limited purposes. In recent years there has developed a greater awareness of the need for a single, logical viscosity system which can be applied to all industrial lubricants regardless of purpose. While it is still true that “there is not enough reliable information now available as regards test methods to permit writing workable oil purchase specifications which would within themselves, without performance tests, serve as a reliable guide in the selection of lubricants”, a necessary first step is the preparation of a universally acceptable viscosity classification.