Hardness indicates a material's ability to resist hard objects being pressed into its surface. It is one of the important performance indexes of metal materials. Generally, the higher the hardness, the better the wear resistance.The hardness of Vickers (HV) is obtained by dividing the load value by the surface area of the indentation pits of the material by the diamond square cone impinger with a maximum load of 120kg and a top Angle of 136°.
Kunshan Five-Pointed Star Bearing Co., Ltd is the branch of Red Star Bearing Factory (Shanghai Lu Hong Bearing Factory), moved to Kunshan officially and changed its name in July 2017. There are 60 years of professional bearing production history. The company has developed on the basis of more than 20 excellent technicians and other experienced engineers. While inheriting the advantages of technology, it also shoulders the responsibility to carry forward the brand. The factory was established in 1958, known as "Red Star" brand bearings, and won the recognition in domestic and international bearing industry. The company mainly produces wheel hub bearings and hub assembly, as well as various non-standard bearings. Our main series are for VW, Audi, Mercedes-Benz car, and we have also been developing Honda, Toyota, GM, Volvo, Hyundai, Kia series and more. The bearings are widely exported to Europe, North America, Southeast Asia and etc. Nowadays “Five-pointed Star” treats “innovation and excellence”, “quality and integrity”, “customer satisfaction” and “eco-friendly and caring worker” as the business philosophy, the life, the goal and the responsibility. We are committed to create the five-pointed star bearing into a century of national enterprises!
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