Northrop Grumman Recommends Siemens CNC Technologies for Use by Its F-35 Supply Chain

ATLANTA, June 19, 2009 - Siemens Energy & Automation, Inc. announced today that after extensive testing and evaluation, Northrop Grumman Corporation Aerospace Systems is strongly encouraging its supply chain to explore the use of Siemens Sinumerik 840D solution line CNC and Sinumerik Volumetric Compensation System (VCS) to achieve high-tolerance machined parts for the F-35 Joint Strike Fighter program.

"Siemens collaboration on the F-35 program began in early 2002 with a CNC technology symposium in Fort Worth attended by Lockheed Martin, Northrop Grumman and BAe Systems," said Tim Shafer, director, Siemens Aerospace Center of Competence. "Since that meeting, the program partners have applied the advanced features of the 840D to solve many of their complex machining challenges. Siemens is honored to receive recognition from Northrop Grumman for this latest advancement in CNC technology."

To find the right equipment to produce these high-tolerance machined parts, Northrop Grumman and its technology partners invested in developing and testing advanced technologies that would enable a step-change in machine tool accuracy. Extensive on-machine testing and evaluation by Northrop Grumman has demonstrated that a quality machine tool appears to be made substantially more accurate by using the Siemens VCS feature of their Sinumerik 840D solution line CNC. Northrop Grumman's testing revealed that a number of key machine tool attributes are necessary to achieve the required high-tolerance machined parts.

These include:

o Robust machine design
o Machine tool repeatability
o Machine tool responsiveness
o Environmental temperature stability
o Stable machine foundation

The Sinumerik 840D sl CNC can provide real-time internal compensation for geometric and feedback errors of a five-axis machine tool. The 840D sl's VCS solution corrects the tool center point and orientation that results in a substantial improvement in volumetric accuracy for fork-head style five-axis machines.

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About Siemens
Siemens Energy & Automation, Inc. is one of Siemens' operating companies in the U.S. Headquartered in the Atlanta suburb of Alpharetta, Ga., Siemens Energy & Automation, Inc. manufactures and markets one of the world's broadest ranges of electrical and electronic products, systems and services to industrial and construction market customers. Its technologies range from circuit protection and energy management systems to process control, industrial software and totally integrated automation solutions. The company also has expertise in systems integration, technical services and turnkey industrial systems.

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Siemens AG (NYSE: SI) is a global powerhouse in electrical engineering and electronics, focusing on the three key sectors of healthcare, industry and energy. Founded 160 years ago in Germany, Siemens AG reported sales of $96.6 billion in fiscal year 2007 (ended September 30). Siemens today employs more than 470,000 people in some 190 countries. In the United States alone, Siemens had sales of over $25 billion (including export sales), fueled largely by infrastructure projects and innovative solutions in the industry areas of medical, automation and control, power, transportation and lighting. Headquartered in New York City, Siemens in the U.S. employs nearly 72,000 people in all 50 states and Puerto Rico. The U.S. is also home to the global headquarters of nine of Siemens' worldwide businesses.

For more information on Siemens in the United States, go to

Please forward all inquiries to:
Siemens Energy & Automation, Inc.
Aerospace Center of Competence
4705 Duke Drive, Suite 250
Mason, OH 45040
Attn: Tim Shafer

For product information and inquiries, call +1 800 879 8079 ext. Marketing Communications or e-mail

CONTACT: John Meyer
+1 847 640 1595

Michael Krampe
+1 770 751 2211

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