When the roughness meter measures the surface roughness of the workpiece, the sensor is placed on the measured surface of the workpiece, and the driving mechanism inside the instrument drives the sensor to slide along the measured surface at a constant speed. The sensor feels the roughness of the measured surface through the built-in sharp stylus. At this time, the roughness of the measured surface of the workpiece causes the displacement of the stylus, and the displacement changes the inductance of the sensor inductance coil, thereby generating an analog signal proportional to the measured surface roughness at the output of the phase-sensitive rectifier. The signal enters the data acquisition system after amplification and level conversion.
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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