Home | Advertise | Subscribe

Magazine | Newsletter | Product Alerts | Blog

September/October 1996

Archive > 1996 > September/October 1996

Download the September/October 1996 Issue in PDF format

Feature Articles

AGMA & MPIF Develop Standards, Information Sheet for Powder Metal Gears
AGMA and members of the Metal Powder Industries Federation (MPIF) are three years into a joint project to develop specifications and an information sheet on rating powder metal gears. According to committee vice chairman Glen A. Moore of Burgess-Norton Mfg. Co., the first phase of the project, the publication of AGMA Standard "6009-AXX, Specifications for Powder Metallurgy Gears," should be completed in late 1996 or early 1997.

IMTS Traveling Companion
The gear lover's guide to "da show," plus native dishes, language lessons, amazing factoids and other bits about our kind of town.

Technical Articles

Gear Wear Caused By Contaminated Oils
The diagnosis and prevention of gear tooth and bearing wear requires the discovery and understanding of the particular mechanism of wear, which in turn indicates the best method of prevention. Because a gearbox is a tribologically dependent mechanism, some understanding of gear and bearing tribology is essential for this process. Tribology is the general term for the study and practice of lubrication, friction and wear. If tribology is neglected or considered insignificant, poor reliability and short life will result.

Tooth Modification and Spur Gear Tooth Strain
A major source of helicopter cabin noise (which has been measured at over 100 decibels sound pressure level) is the gear box. Reduction of this noise is a NASA and U.S. Army goal.

Alternative Lubrication Methods for Large Open Gear Drives
The type of lubricant and the method of applying it to the tooth flanks of large open gears is very important from the point of view of lubrication technology and maintenance. When selecting the type of lubricant and the application method, it is important to check whether it is possible to feed the required lubricant quantity to the load-carrying tooth flanks, This is necessary to avoid deficient lubrication, damage to the gear and operational malfunctions. It is important to determine the type of lubricant, which may be fluid or grease-like. The consistency of the lubricant will have a direct impact on the ability of the lubrication system to feed adequately the lubricant to the gear. The interactions between the common types of lubricant and the lubrication application methods for open gear drives are shown in Fig. 1.

Powder Metal Gear Design and Inspection
Powder metallurgy (P/M) is a precision metal forming technology for the manufacture of parts to net or near-net shape, and it is particularly well-suited to the production of gears. Spur, bevel and helical gears all may be made by made by powder metallurgy processing.

Departments

The Politics of Denial (Publishers Page)
A good many things bother me about election years - the annoying sound bites, the negative commercials, the endless political over-analysis. But what bothers me most about the coming election is this: So far (when I'm writing this, it's admittedly early in the campaign) there's little or no talk about what is one of the most critical national issues of the next thirty years - our growing government debt.

Product News (Product News)
Welcome to out Product News page. Here we feature new products of interest to the gear and gear products markets.

Technical Calendar (Events)
Complete Technical Calendar for September/October 1996.

Industry News (Industry News)
The Latest Moves, Hotline, Also Known As..., Cybercompanies, etc.

The Bridges of Cook County and Other Sagas (Addendum)
In spite of being the "Second City," Chicago has always cultivated a reputation for bigness. We're known for big talk, big shoulders, big basketball players - and big gears. While not necessarily the biggest in the world (more about that late), some Chicago gears are among the hardest working.