FOR IMMEDIATE RELEASE

NSK Develops Low-Torque Ball Bearings for Hybrid Vehicles
Designed to Improve Fuel Efficiency in Hybrids

Tokyo, Japan, June 9, 2009 – NSK Ltd. (NSK; Headquarters: Tokyo, Japan; President and CEO: Seiichi Asaka) has developed new low-torque ball bearings for hybrid vehicles featuring a 50–65% improvement in frictional loss compared to conventional bearings. NSK designed the new product specifically for use in hybrid vehicles — a growing market due to improvements in fuel efficiency and rising environmental awareness — and expects annual sales of more than 3 billion yen by 2013.

In recent years, demand for hybrid vehicles has been rising rapidly, thanks to the low fuel consumption and low emissions realized through a more efficient integration of the engine and electric motor. In order to further improve fuel efficiency, there is a growing need to reduce torque loss in the bearings used in the transmissions (drive-trains) of new generation hybrid cars. NSK has met this need with its new low-torque bearings, which dramatically reduce frictional loss. Going forward, NSK expects growing sales to automobile manufacturers of hybrid vehicles in and outside Japan. The new product will be featured first in Toyota’s latest Prius.

Product features
To date, most observers considered it too difficult to achieve further reductions in the torque loss of ball bearings. Despite this, NSK has found a way to cut torque by 50–65% compared to existing product by implementing the unique solutions described below.

1. Optimization of internal design
The number of balls has been dramatically reduced, and ball diameters, race dimensions, and clearances have been optimized utilizing analysis technology, which has allowed rolling friction losses to be minimized. Another key factor in this success was NSK’s development of new manufacturing processes that overcame conventional hurdles to significantly decrease the number of balls.

2. Introduction of low-torque cages
Losses have been reduced dramatically by agitating lubrication oils during operation via the introduction of specially shaped cages made of resin.
NSK has achieved compactness, lightness and low torque for automobiles via its four core technologies (tribology, materials, analysis and mechatronics), which it has cultivated for 90 years, and is determined to push forward with the development of products that will improve the fuel efficiency of automobiles in the future.

- 30 -

About NSK Canada
NSK Canada is a member of the NSK Ltd. Group of companies headquartered in Tokyo, Japan. As one of the world's leading bearing manufacturers, it produces and distributes over 100,000 different types of bearings, linear motion and automotive component products.

In Canada, NSK operates with strategically located distribution centres that supply both the original equipment and industrial distribution market. Its network of authorized distributors has the expertise, inventory and delivery systems to meet industry needs, working in partnership with NSK sales and engineering teams to ensure those needs are met with precision and speed. For more information, visit www.ca.nsk.com or www.nskmaxuptime.com.

About NSK Limited 
Headquartered in Tokyo, Japan, NSK Limited is a world-class producer and innovator of motion and control products. Established in 1916, NSK became a world leader in the industry because of an intense commitment to engineering research, modern manufacturing processes and superior quality.

Today, the company is one of the world’s largest bearing manufacturers, employs over 23,000 people worldwide, has 60 global manufacturing facilities and 127 sales offices, operates 12 technology centres and produces and distributes over 100,000 different types of bearings, linear motion and automotive component products. For more information, visit www.nsk.com.

Back