Nippon Seiko Co., Ltd. has successfully developed a globally-produced 'long-life rolling bearing' for use in transmissions (hereinafter referred to as "T/M"). This product enables T/M to be miniaturized, lightweight, and improves the fuel economy of the car. Saves motor energy. NSK expects sales of the product to reach 2 billion yen by 2023.
Development background
In order to improve the fuel economy of automobiles and save automotive electric power, T/M is miniaturized and lightweight, and rolling bearings used in T/Ms are also required to be miniaturized and lightweight. However, as the size of bearings is reduced, durability will increase. Lowering, more prone to failure. The most common type of failure is due to the presence of foreign matter in the lubricant intrusion into the indentation origin of the type of formation of the bearing, therefore, to improve the durability of the indentation origin of the type of exfoliation becomes more important.
To this end, NSK has developed long-life bearings for indentation originating type flaking. However, because these bearings require the use of special heat-treating technologies under special circumstances and NSK's proprietary materials, T/M production outside Japan is also Increasingly, localized production of long-life bearings has become a topic that needs urgent solution.
Product Details
1. Improve the local purchasing possibilities of materials
Develops alternative materials based on ISO standard (International Standard) steel, which can be purchased globally, thus making local purchasing possible.
2. Improve heat treatment efficiency
Switch to a heat treatment technology that does not require prolonged periods of time and under special circumstances. Ensure the necessary life through temperature control. This technology can reduce the energy loss in the production process.
3. Longevity
Compared with standard bearings, the bearing developed this time has been extended by 1.5 times in the foreign body environment, so that the bearing can be miniaturized and the weight can be reduced. Compared with standard bearings, this bearing can achieve about 20% lighter weight. This, the long-life bearing series has been expanded to further meet the needs of customers.
In addition, the service life of the bearing has also been extended for flaking (other than non-metallic inclusions in the material and the intrusion of hydrogen inside the material) beyond the starting point of the indentation.
Product effect
The birth of this product has led to the realization of miniaturization on a global scale. Lightweight bearings have become possible. This not only helps to increase the fuel economy of T/M, but also saves the electric energy of the car. It also saves energy during the manufacture of bearings.