NSK Develops a Long- Life, Large-Size, Roller Bearing for Large Gearboxes

Improved Reliability for Large Gearboxes Used in Wind Power Generators and Other Industrial Machines

Tokyo, Japan, May 27, 2014 - NSK Ltd. (NSK; Headquarters: Tokyo, Japan; President and CEO: Norio Otsuka) today announced that it has developed a long-life, large-size roller bearing for large gearboxes.

The key to the development was a combination of special heat treatment technology and material developed by NSK that provides excellent flaking resistance, including that of white structure flaking.

NSK is targeting 1 billion yen in global annual sales by 2017 for this product, which is designed for large gearboxes used in heavy load conditions, such as wind power generators.

Development Background

Roller bearings that can support heavy loads are used in gearboxes* used in large industrial machines such as wind power generators, mining and construction equipment, and steelmaking equipment. In recent years, wind power generators have increased in size in order to generate more power. Also, mining and construction equipment and steelmaking equipment are used in very harsh conditions. Therefore, bearings used in the large gearboxes used for such applications must be highly reliable.

In response to these needs, NSK has developed large sized roller bearings that provide a high level of reliability through a combination of special heat treatment technology and material developed by NSK.

*Gearbox:

A device made of many gears that is located between the input and output shafts and that is used to change the input RPM to the desired output RPM.

Structure of Gearbox Used for a Wind Power Generator

Product Features

NSK was able satisfy the demand for greater performance in roller bearings for large gearboxes by combining special heat treatment technology and material developed by NSK. In particular, NSK has been able to decrease early damage by white structure flaking that leads to seven times service life longer than conventional bearing.

Product Benefits

The newly developed bearing is better than the conventional bearing as outlined below, for improved gearbox reliability in harsh usage environments.

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German engineering innovation cost up to 13.3 billion

Machinery and equipment manufacturing industry is one of the five major industries in Germany; it is ahead of electrical equipment and car manufacturing industry. In 2013, Germany has 6 million machinery and equipment manufacturing company, about 9.86 million employees. It is need to emphasize that car production and electrical equipment production generally have significant characteristics of parts standardization and mass production, thus construction machinery field is usually with single, small-scale production. And engineering machinery field is mostly medium-sized enterprises, 87% of employees less than 250 people, two-thirds of the enterprise employees are even less than 100 people, only 2% of the enterprise employees more than 1000 people. The small and medium-sized enterprises with their particular areas of expertise, to become the world's market leader. German engineering machinery industry is export-oriented industry, 77% of revenue from overseas markets. In 2013 German machinery field trade surplus is 9.3 billion Euros. Machinery industry growing globally, embodied in that German machinery companies’ foreign direct investment (FDI) and capital from foreign direct investment in machinery industry are both growing significantly. Germany has 15.9% share of global mechanical industry trade, ahead of United States and China. Apply latest technology is a prominent feature of German engineering industry. With the innovation of product and service, it has helped customers win competitive In 2012, engineering machinery industry innovation cost is 13.3 billion Euros, significantly higher than (R&D) cost (2012 R&D expenditure in this area is5.8 billion euro). This difference shows the importance of engineering innovation. Received a good education of high-level technical personnel is the most precious wealth for German engineering machinery industry, there are 183000 engineers in construction machinery industry, In fact, only the excellent technical engineers can ensure the engineering machinery industry innovation. www.tengdabearings.com

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