May/June 2004

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20th Anniversary Issue

Celebrating 20 Years
A look back at Gear Technology's first 20 years and how the gear industry has changed.

Single-Flank Testing of Gears
This article was originally published 20 years ago, in Gear Technology’s first issue. It describes a method of evaluating the smoothness, or lack of smoothness, of gear motion. This lack of smoothness of motion, known as “transmission error,” is responsible for excitation of gear noise and problems of gear accuracy and sometimes has a relationship to gear failure.


Comparison of Rating Trends in AGMA Versus ISO
As the international business community grows closer together, the need for understanding differences between national and international gear rating standards becomes increasingly important for U.S. gear manufacturers competing in the world market.

Globalization Brings AGMA, ISO Standards Closer
“The gear marketplace is a global marketplace.” Bill Bradley says it easily, with no special emphasis. The vice president of AGMA’s technical division sees the statement as an obvious fact.

Winds of Change in Profile Grinding
Recent breakthroughs in profile grinding software are helping Anderson Precision Gears and others meet wind power’s insatiable appetite for faster production of large, high-quality gears.

Evaluation of Bending Strength of Carburized Gears
The aim of our research is to clearly show the influence of defects on the bending fatigue strength of gear teeth. Carburized gears have many types of defects, such as non-martensitic layers, inclusions, tool marks, etc. It is well known that high strength gear teeth break from defects in their materials, so it’s important to know which defect limits the strength of a gear.

Grinding and Abrasives
Flexibility and productivity are the keywords in today’s grinding operations. Machines are becoming more flexible as manufacturers look for ways to produce more parts at a lower cost. What used to take two machines or more now takes just one.

A Model of the Pumping Action Between the Teeth of High-Speed Spur and Helical Gears
For a high-speed gearbox, an important part of power losses is due to the mesh. A global estimation is not possible and an analytical approach is necessary with evaluations of three different origins of power losses: friction in mesh contact, gear windage and pumping effect between teeth.


Reflections (Publishers Page)
When a man looks into a mirror, the image reflects who he is today. But it also reveals who he used to be. Although appearances change, many of the underlying characteristics remain the same. The same is true with Gear Technology, as we celebrate our 20th anniversary and reflect on who we are.

Product News (Product News)
The complete Product News section from the May/June 2004 issue of Gear Technology.

Revolutions (Revolutions)
"Frenco--Inspecting All Flanks in Minutes."

Technical Calendar (Events)
Calendar of events from the May/June 2004 issue of Gear Technology.

Industry News (Industry News)
The complete Industry News section from the May/June 2004 issue of Gear Technology.

The Signs According to Gear Heads (Addendum)
How often have you put your elbow on the water cooler, sipped from your paper cup and wondered: How’s my work in this gear shop affected by my astrological traits?