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NSK successfully developed fretting wear-resistant grease in shaking environment
Deep groove ball bearings for automobiles will be more wear-resistant~Nippon Seiko Co., Ltd. (headquarters: Shinagawa-ku, Tokyo, legal representative: director representative, executive president and CEO Toshihiro Uchiyama, hereinafter referred to as NSK), for applications in shaking environments We have developed anti-fretting grease for deep groove ball bearings for automobiles, and succeeded in improving the wear resistance in shaking environments. This product improves the wear resistance of the grease while ensuring the heat resistance of the grease through the optimal ratio of grease components. Contributes to the improvement of the durability of grease under shaking environment in the application of automobile electrification and low fuel consumption. NSK expects the sales of this product to reach 1 billion yen in 2022. Development background For the sustainable development of society, environmental laws and regulations related to automobiles are being strengthened day by day, and low fuel consumption and electrification are being continuously promoted. Compared with the conventional use conditions, in addition to the rotation, the use of the shaking state will gradually increase. In the shaking environment, the fretting wear between the bearing raceway and the rolling elements will cause wear or cause noise and vibration. In addition, automotive bearings are often used in high-temperature environments. In addition to wear resistance, there are also certain requirements for heat resistance. Product features 1. Improve wear resistance: Use thickener to suppress fretting wear. Choose a substance that is easily adsorbed on the metal surface as a thickener for grease. As the viscosity of the base oil decreases, the thickener and base oil will change. Easy to separate. Therefore, a thickener layer is formed on the surface of the raceway surface, thereby achieving the purpose of inhibiting fretting wear. * The thickener has the function of maintaining the base oil that serves as a lubricating function. 2. Maintain heat resistance: Additives that can improve heat resistance are used to improve wear resistance. Low viscosity base oil is used, which may cause resistance to high temperatures thermal reduction. Therefore, an additive that improves heat resistance at high temperatures has been added to the grease to ensure the same heat resistance as conventional greases. * Additives function as auxiliary base oils (representative additives: antioxidant, etc.) Effects of this product The grease developed this time improves the durability of fretting-resistant deep groove ball bearings for automobiles in vibration environments.
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