April 2013

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April 2013 (Complete Issue PDF)

Feature Articles

New Motor Technology
Novatorque energy efficient motors, Portescap smaller-size brushless DC motors, Pittman customized motors, Kollmorgen stainless steel motors, Crouzet expanded motor series, and a report from IHS on rare earth mineral supply.

Up in the Air - Aerospace Gears
Volatile aerospace market keeps gear manufacturers guessing.

Technical Articles

Rolling Bearing Steels - A Technical and Historical Perspective, Part 2
This paper is part 2 of 2 in a series that summarizes the chemical, metallurgical and physical aspects of bearing steels and their effect on rolling bearing life and reliability.

Trends in Industrial Gear Oils
With today's smaller, hotter - and overloaded - machinery, specifying the correct lubricant is vital.

Electrical and Mechanical Torque Limiting
Q&A: My company manufactures high-speed metal forming machines. We have one application on a feed axis where we are encountering problems with the coupling...


Chasing the Dream (Publishers Page)
Over the past several weeks, I've had quite an interesting back-and-forth e-mail conversation with John Pellegrino, an engineer, inventor and dreamer whose letter appears on page 8.

Am I Wasting My Time (Voices)
Reader John Pellegrino looks for advice on his pursuit of a positively engaged continuously variable transmission.

As Risk Recedes, Market Rises (Market Update)
The S&P 500 has rallied six percent since our last review...here's analyst Brian Langenberg's take on what's next for the industrial economy.

Product News (Product News)
SKF energy-efficient bearings, Bishop Wisecarver guided motion system, Weiss torque rotary table, Mico wireless braking system, Nord worm gear series, and SKF expanded range of couplings.

Motion Drive and Automation at Hannover 2013 (Events)
Power Transmission and control companies will be on hand during Hannover Messe 2013 to display the latest technology offerings in key product categories including roller bearings, gear wheels, pumps, motors, transmissions, drive system components, clutches and braking systems.

Calendar (Events)
The complete technical calendar from the April 2013 issue of Power Transmission Engineering.

Industry News (Industry News)
News from Timken, Klueber, Sumitomo, NFPA, and more from the April 2013 issue of Power Transmission Engineering

John Oldham: The Coupling Personified (Power Play)
A biographical sketch of John Oldham, inventor of the Oldham coupling.