September/October 2017

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Feature Articles

The Valued Troublesome Employee
I'm sure it comes as no surprise that finding skilled people to work in your manufacturing facility is no simple task. But after finding them, and investing in the development of their abilities, what happens when one of them - an employee your company really needs - becomes a troublesome employee? This is among the trickiest situations a manager can face.

Gear Expo 2017 Booth Listings
Map and directory of Gear Expo 2017. Plan your visit with this handy guide.

Gear Expo 2017 and ASM Heat Treat 2017 Booth Previews
The latest technology on display in Columbus, OH. October 24-26.

Gear Expo 2017 Showstoppers
This special advertising section highlights exhibitors from Gear Expo 2017 and ASM Heat Treat 2017.

ASM Heat Treat 2017
Don't miss these exhibitors co-located with Gear Expo.

Coming Clean on Gearbox Lubrication
Design and manufacture of gears is among the most complex and difficult disciplines of the industrial arts. From initial conception to machining and finishing, making gears ain't bean-bag. And guess what? Once those gears roll off the assembly line, it doesn't get any simpler. That's because gears - the metal ones at least - require the correct lubrication in order to prevent - or delay as long as possible - such things as wear, scuffing and Hertzian fatigue.

ExxonMobil on Benefits of Synthetic Gear Oils
Base oils play an important role in determining the performance of an industrial gear oil. They influence characteristics such as low temperature performance, biodegradability, energy efficiency and high temperature thermal and oxidative stability.

What's New and Noteworthy in Powder Metal
First, the facts: powder metallurgy is a cost-effective method of forming precision net-shape metal components that allows for more efficiently designed products. It saves valuable raw materials through recycling and the elimination of costly secondary-machining. PM competes with wrought steel gears as the technology continues to advance. You'll find PM components in everything from automobile transmissions to aircraft turbine engines, surgical equipment and power tools.

Technical Articles

Tooth Contact Analysis - Off Line of Action Contact and Polymer Gears
The aim of the study was to apply such a specialized tooth contact analysis method, well-used within the steel gear community, to a polymer gear application to assess what modifications need be made to these models for them to be applicable to polymer gears.

Wear Investigation of Finish Rolled Powder Metal Gears
When manufacturing powder metal (PM) gears lead crowning is not achievable in the compaction process. This has to be accomplished either by shaving, grinding or honing. Each of these processes has their merits and draw backs. When employing rolling using a roll burnishing machine lead crowning can be accomplished but due to errors in profile a hard finishing operation such as grinding is used by the industry. In this paper a helical PM gear that has sufficient tolerance class after rolling has been tested in a test rig for durability and the wear has been studied.

Analysis of Excitation Behavior of Two-Stage Gearbox Based Upon Validated Simulation Model
In order to reduce costs for development and production, the objective in gearbox development and design is to predict running and noise behavior of a gearbox without manufacturing a prototype and running expensive experimental investigations. To achieve this objective, powerful simulation models have to be set up in a first step. Afterwards, those models have to be qualified and compared to experimental investigations. During the investigation procedure of gearboxes, there are two possibilities to evaluate the running and noise behavior: quasi-static and dynamic investigations. In times of engine downsizing, e-mobility and lightweight design, the dynamic excitation behavior is becoming increasingly important.

Departments

Got Gear Questions - Get Gear Answers (Publishers Page)
Gear Expo 2017 is your best opportunity to expand your knowledge, get answers to your technical questions and solve your toughest manufacturing challenges. The reason is quite simple. Gear Expo provides you with the greatest collection of gear expertise, know-how and experience you can find.

Why Monitor My Power Consumption (Voices)
At first, monitoring the energy I use at my plant or the energy for each individual machine seemed trivial. Isn't this just an overhead cost I have to pay? I'm certainly not going to turn off a machine that costs too much to run when I have to get a job out for that month. Then, I realized how much savings there was for monitoring power consumption and the ROI was timely.

Product News (Product News)
Grinding fluids from Norton|Saint-Gobain, digital micrometer from Mahr, grinding centers from Haas Multigrind, updated software from KISSsoft.

Backlash and Axial Movement (Ask the Expert)
What is the relationship between angular backlash and mean or normal backlash, the axial movement of wheel gear, and mean or normal backlash for bevel and hypoid gears?

Industry News (Industry News)
Bob Errichello retires from teaching, Siemens expands technical center, HBM Holdings acquires Schafer Industries, plus new hires and other industry news.

Guilt by Association (Addendum)
The definition is pretty straightforward: An association is an organization of persons having a common interest. Basically, it's a group that shares a purpose or mission that exists for the mutual advancement of its members.