WSBC Bearings’ quality inspection process is rigorous multi-dimensional verification. On the material level, each batch of bearing steel needs to go through the direct reading spectrometer to detect the content of 12 elements (e.g., Cr content error ≤±0.03%), and ultrasonic inspection to ensure that the internal defect size < 0.4mm ², 2023 data show the raw material pass rate of 99.98%. Take wind power spindle Bearings as an instance. The hardness of the surface should be kept stable at 60-62 HRC, the slope of core hardness should be regulated to ±1.5 HRC, and tensile strength ≥1,800 MPa after carburizing heat treatment. A comparison test by a European fan manufacturer suggests that WSBC Bearings’ cycle of microcrack formation is 40% longer than that of the industry average.
In the life test, WSBC Bearings are operated and tested on the extreme working conditions simulator. For example, high-speed railway bearings must continuously run for 5,000 hours at 380 km/h speed (actual equivalent mileage of 2.4 million km), and withstand alternating stresses of 120 kN axial load and 80 kN radial load, and maximum vibration acceleration ≤1.5 m/s². In 2022, after WSBC Bearings are mounted to a certain model of Beijing-Shanghai high-speed train, the rotation repair cycle of the wheelset is increased from 150,000 kilometers previously to 320,000 kilometers, while the operation and maintenance cost is reduced by 37%. Its tapered roller bearings need to go through 2 million impact load tests (single impact energy 2.3 kJ) to ensure the area of spalling on the raceway is < 0.05 mm² at the impact frequency of 10 Hz, and the failure rate tested by an Australian iron ore company is reduced by 58%.
The test of environmental tolerance is from -60 ° C to 350 ° C. WSBC Bearings’ ceramic mixed bearings must ensure the change of radial clearance ≤± 5μm at 1,200℃ in the high temperature test chamber. Corrosion resistance is assured by salt spray test for 2,000 hours (ISO 9227 standard). The example of Baosteel hot rolling line’s application in 2023 shows that the replacement time of its radiant heat below 1,150℃ continuous casting machine bearings is extended from 3 months to 18 months, and its loss of shutdown is reduced by 120 million yuan. In Arctic scientific research equipment, WSBC Bearing low-temperature grease bearings have an initial torque as low as 0.15N ·m at -50℃, 65% lower than general products, to guarantee that the snowmobile drive system runs continuously for 3,000 hours without jam.
Intelligent detection technology is the core hurdle of WSBC Bearings. Its artificial intelligence (AI)-enabled three-dimensional (3D) optical scanning technology can detect raceway profile deviation (accuracy ± 0.8μm) along with vibration spectrum analysis (frequency range 0-20 kHz) for the measurement of abnormal harmonics of actual operating bearings (amplitude resolution 0.01 μm). When Siemens applied the technology on its gas turbine production line in 2021, its defect rate for defective bearing assembly was reduced from 0.12% to 0.003%. In addition, WSBC Bearings’ blockchain traceability system records 2,300 pieces of production data (grinding parameters, heat treatment curves) of each set of bearings. The customer can check the whole life cycle quality files by scanning the code. A new energy car company will thus improve the quality inspection efficiency of the supply chain by 45%.
As for the certification system, WSBC Bearings is certified to ISO 15243:2017 by TUV Sud. Its vibration value (Z4 grade) is controlled below 1.2mm /s, and its noise level is up to Class 1 of the VDI 2056 standard. In the FDA approved food-grade bearing test, its lead content in stainless steel < 5 ppm (regulatory value 10 ppm), the colonies’ total ≤50 CFU/cm², a dairy giant filling line after adding product pollution rate reduced by 92%. All these figures justify WSBC Bearings’ “zero defects” quality ideology as the goal, repeatedly reshaping the reliability standards of industrial parts.