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August 20, 2010

Hub motors: Not ready for electrical cars, yet
Electric hub motors have been around almost as long as the automobile. But are they technologically ready to power consumer cars and trucks?


Ringfeder Power Transmission’s Gerwah RING-flex® Couplings

RINGFEDER POWER TRANSMISSION's full line of Gerwah RING-flex® couplings are available in single or double and close-coupled flexing designs for torques up to 500,000 lb-ft and shafts up to 11” in diameter. Completely maintenance free and no lubrication required, these long-lasting, torsionally rigid disc couplings operate without wear in high temperature environments. RING-flex® couplings are available in four, six, and eight-bolt designs to accommodate a wide variety of connections in pumps, conveyors, printing presses, fans and generators, or anywhere else a backlash-free connection is required. Unique designs are available including: flange-mounted, close-coupled, high-speed, and extra-long couplings.
Please contact us for information on RING-flex® couplings and other Gerwah products.

Ringfeder Power Transmission USA Corporation

Untangling power and energy
Do you know the difference between power and energy? It seems many of the folks pushing alternative and renewable energy often get confused on this point.


Are natural-gas-powered cars the next big thing?
The pros and cons of powering your car with natural gas.

The Army's newest .50 caliber machine gun
This article reveals details of the Army's replacement for its 70-year old Browning machine gun.

Featured Content

Can we make a better blow-out preventer and stop oil spills?
Blowout preventers on subsea drilling rigs are the last line of defense against catastrophic oil spills. But as the Deepwater spill shows, they are far from infallible. Can they be improved or are they good enough?


Featured Video

An air powered 24-string guitar tree
This seven-minute video takes a look at a robotic guitar player of sorts built to demonstrate electronic actuation of pneumatic systems built. It was built by Rob Clippard from Clippard Scientific Laboratory Inc.

New Products

Planetary gearboxes
Planetary gearboxes come in sizes from 800 to 2.1 million lb-ft output torque. The gearboxes’ modular construction has inputs for SAE and NEMA mounting or adapters for any hydraulic or electric motor. Available output shafts include SAE, DIN, or custom designs. Applications include shredders, directional drills, mudpumps, winches, and conveyors.
Fluid Gear Products LLC


Miniature right-angle gearbox
The custom subminiature right-angle gearbox is for applications requiring a lightweight, mil-spec, 1:1 ratio gearbox. Designed using a shaped machined aluminum block housing, lightweight gears, and shafting, the unit weighs 35% less than its predecessor. Ball bearings, shaft seals, and-low temperature grease are also included.The gearbox measures 13/8 × 13/8 × 5/8 in. and has a 6 lb-in. torque rating.
Rino Mechanical Components

News from MD


The video site for engineers, has been completely redesigned and relaunched with an entirely new look and enhanced functionality. Browse video libraries on specific technology topics or browse by company brands, by tradeshow, or even by publication-specific video “playlists.” It is all the same quality editorial content and cutting-edge technology videos, but with better usability. Check it out today!

Players from across the globe are competing for fun, education, prizes and the ultimate bragging rights. Thanks to our sponsors for their support of the exciting online opportunity for engineers! Play Now!

Altech Corp.
Avago Technologies
Digi-Key Corporation
Dynaflo Vacuum Pumps & Compressors
Festo Corp.
Forest City Gear
Hewlett Packard
R+W America L.P.
Smalley Steel Ring
W. L. Gore & Associates

Click Here for a list of archived Machine Design webcasts.

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Contact Information
Editorial questions:   Stephen Mraz 216-931-9521
Advertising/sponsorship opportunities:   Virginia Goulding 216-931-9893

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