May 2016

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Feature Articles

The End of an Era - Joe Franklin's Valedictory
AGMA President Joe Franklin is stepping down after some 24 years on the job. He graciously took the time to answer some questions from Gear Technology Senior Editor Jack McGuinn regarding his tenure.

Off-Highway Endures Soft Markets
under pressure from numerous market forces. The oil sector's decline, weakened global economies (particularly China) and local government policies outnumber and outweigh relieving forces such as the FAST Act, leaving the industry in a general downturn. The outlook has yet to become truly grim, but companies are beginning to scale back.

All-For-One, One-For-All
The "less is more" mantra is certainly a rallying cry in manufacturing. Technologies like multiaxis machining, 3D printing and automation are enabling companies to be more efficient, cost-conscious and flexible on the shop floor.

Technical Articles

Noise Reduction in an EV Hub Drive Using a Full Test and Simulation Methodology
With the ongoing push towards electric vehicles (EVs), there is likely to be increasing focus on the noise impact of the gearing required for the transmission of power from the (high-speed) electric motor to the road. Understanding automotive noise, vibration and harshness (NVH) and methodologies for total in-vehicle noise presupposes relatively large, internal combustion (IC) contributions, compared to gear noise. Further, it may be advantageous to run the electric motors at significantly higher rotational speed than conventional automotive IC engines, sending geartrains into yet higher speed ranges. Thus the move to EV or hybrid electric vehicles (HEVs) places greater or different demands on geartrain noise. This work combines both a traditional NVH approach (in-vehicle and rig noise, waterfall plots, Campbell diagrams and Fourier analysis) - with highly detailed transmission error measurement and simulation of the complete drivetrain - to fully understand noise sources within an EV hub drive. A detailed methodology is presented, combining both a full series of tests and advanced simulation to troubleshoot and optimize an EV hub drive for noise reduction.

Rules for Optimal Basic Design of Bevel Gears
Bevel Gear Technology Chapter 6

Departments

Happy Birthday! (Publishers Page)
The 25th anniversary is the silver. The 50th is the gold. The 75th is the diamond. But what symbolizes the 100th?

The Gear Industry Needs You (Voices)
your life and in your professional career is an inflection point for you to take stock of where you came from and where you are going.

Make Volunteering the Norm (Voices)
This is a very exciting year for AGMA as the organization celebrates its 100-year anniversary. In addition to the anniversary, AGMA President Joe Franklin, jr., who has done an outstanding job at the helm of AGMA for the last 25 years, will retire, and we welcome in our new AGMA President, Matt Croson, who will lead us into the next 100 years. The centennial kicked off in October with a dinner at the AGMA Gear Expo in Detroit and will continue throughout 2016 with a number of exciting events scheduled to celebrate this milestone anniversary.

Product News (Product News)
Latest news about upcoming products

Idler Gears (Ask the Expert)
What is the point of using two idler gears in a geartrain?

Calendar (Events)
Calendar of Events

Industry News (Industry News)
Lastest news from around the industry.

NOME Is Where The Energy Is (Addendum)
According to the U.K.-based WITT Energy website (witt-energy.com), "The WITT is the only device in the world that can capture energy from all movement and turn it into electricity. No other energy system can exploit the full spectrum of movement, enabling it to harvest power from water (sea, river or tidal), wind and human or animal motion."