August 2013

Archive > 2013 > August 2013

August 2013 (Complete Issue PDF)

Feature Articles

Flexible Options with Flexible Shafts
You need to transmit a rotary motion where no straight line is possible. Or, you need to allow for some uncontrollable misalignment. How about transmission taking place between moving components? What if you need to control something in hazardous locations where you cannot directly handle the application, such as high-temperature environments, under hazardous conditions or in clean room applications? Functionally designed flexible shafts can meet all these challenges.

Medical Motion Control
Controls from Quicksilver help in the design and development of medical rehabilitation equipment originally designed for returning astronauts.

Showstoppers - Gear Expo 2013
Don't miss these highlighted exhibitors.

Gear, Gear Drive and Power Transmission Component Suppliers at Gear Expo 2013
Map and listings of the exhibitors providing power transmission components.

Shaking Hands in Indianapolis
Gear manufacturers set to talk with gear buyers at Gear Expo 2013.

Product News
The complete Product News section from the August 2013 issue of Power Transmission Engineering

Technical Articles

Preventing Fretting Fatigue in Blade Dovetail Roots by Modifying Geometry of Contact Surfaces
Dovetails, gears and splines have been widely used in aero engines where fretting is an important failure mode due to loading variation and vibration during extended service. Failure caused by fretting fatigue becomes a prominent issue when service time continues beyond 4,000 hours. In some cases, microslip at the edge of a contact zone can reduce the life by as much as 40–60 percent.

Brush DC Motor Runs Along
Everything started in 1800 when Volta developed the first DC battery. Faraday used the DC battery to develop the first electric motor. It used brushes to transfer the battery voltage and current to the rotating disk rotor. This was in mid-1831. Thus was born the brush DC motor.


Gear Expo - Gear Buyers Bonanza (Publishers Page)
If you’re reading this magazine, there's a good chance you're somehow involved in the design, specification or purchase of gears or geared products. As such, I urge you to make plans now to attend Gear Expo in Indianapolis, September 17-19

Quiet Out There - Global Industrial Outlook (Market Update)
Since our last appearance in this space we've attended the Paris Air Show and met with companies involved in oil production, hydraulic fracturing and wind turbine towers and components. As an investment analyst I am always seeking to help my clients anticipate change in order to manage risk and capture alpha (positive returns relative to market). But as a regular columnist for Power Transmission Engineering, I also seek insights that can help your organization do the same. Here is what we've found...

PowderMet 2013 (Events)
Winning parts from the 2013 Powder Metallurgy Design Excellence awards.

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

Industry News (Industry News)
The complete Industry News section from the August 2013 issue of Power Transmission Engineering.

Seabees (Power Play)
For the Seabees, hazardous construction zones have always been part of the job.