Analysis: Bearing industry development and the need for CNC equipment

**Analysis: Development of the Bearing Industry and the Need for CNC Equipment** Home > Bearing Knowledge > Analysis: Bearing Industry Development and the Need for CNC Equipment --- **Source: China Bearing Network | Time: February 1, 2013** In the manufacturing process of bearings, various types of molds are used, including stamping dies for steel plates, clamping dies for plastic retainers, stamping dies for rolling elements, high-precision dies for drawn outer rings of needle bearings, cold rolling and casting dies for bearing rings, and installation molds. All these require high-efficiency and high-precision CNC equipment. However, domestic CNC equipment often fails to meet the required performance and accuracy standards. As a result, some high-precision mold CNC equipment is imported, while others use low-cost or modified machines. Despite the huge demand for such equipment in China, its current market penetration remains low. The specialized production of bearings requires tailored CNC solutions based on product characteristics. High precision, low noise, large volume, and cost-effectiveness are key factors in producing motor bearings. Currently, there are over 300 deep groove ball bearing production lines in China that operate with fully automated grinding systems. The adoption of CNC technology has significantly improved the production quality of low-noise motors. These automated lines are now expanding from small and miniature bearings to medium and large ones, making the requirements more complex and diverse. Advanced features such as active measurement, off-line testing, error compensation, quality monitoring, and data transmission are becoming essential in this process. Bearing installation, including active detection and packaging, has long been a challenge in the industry. While foreign companies have successfully implemented automated installation lines for years, domestic efforts have not yet reached the same level of efficiency. Therefore, developing integrated automated installation lines that connect with grinding production lines is crucial. This integration reduces manual intervention, lowers costs, and improves both production efficiency and product quality. Given the variety of bearings, each with unique characteristics, the need for diversified CNC equipment in installation processes is growing. Currently, the production of bearing rollers in China still relies heavily on single-machine operations. In contrast, leading international manufacturers use automated grinding lines. A few Chinese companies have introduced Japanese equipment, but high costs and depreciation issues limit widespread adoption. Bearing rollers require extremely tight tolerances—typically 1–2 micrometers, with 0-level rollers needing to be within 1 micrometer. Surface quality must also be strictly controlled. Therefore, the bearing industry urgently needs reliable, high-precision CNC equipment that can support automated roller grinding and anti-rust packaging lines, along with error compensation and real-time quality control. Steel balls, being the most commonly used rolling elements, also require advanced automation in their post-processing stages, including automatic sorting, inspection, rust prevention, and packaging. While some progress has been made domestically, significant gaps remain compared to global leaders. Steel balls often require nanometer-level precision, even stricter surface quality, and large-scale production, which demands high-performance, high-reliability, and high-cleanliness equipment. As a result, the bearing industry is pushing for digitalization and automation, with CNC-based production lines becoming the preferred choice for modern manufacturing. The main challenges and needs of the bearing industry regarding CNC equipment include: - **High reliability and prompt after-sales service**: This is especially critical due to the continuous, large-volume production lines. Any malfunction in the CNC system can cause major disruptions, leading to significant losses. - **Specialized and highly automated equipment**: Although some domestic machines are available, they still lag behind in terms of precision, stability, and durability. Continuous improvements are needed to meet the demands of the industry. - **Long-term, high-speed operation**: Many companies operate 24/7, requiring equipment that can work efficiently with minimal downtime. Features like fault alarms, quick diagnostics, and rapid troubleshooting are essential. - **Collaboration between industries**: Close cooperation between CNC equipment suppliers and bearing manufacturers is vital for mutual growth. As the national economy and industrial technologies advance, the demand for high-quality bearings continues to rise, pushing the industry toward higher standards and greater specialization. The variety, quantity, level, and concentration of bearings all play a significant role in the development of the entire industry. Bearings with low vibration, no noise, high precision, and special applications—such as those used in petrochemical, automotive, railway, and engineering machinery—are in increasing demand. Accelerating the development of CNC equipment aligned with these needs will help improve China’s bearing production capabilities, enhance precision, shorten production cycles, reduce costs, and boost exports. In conclusion, the bearing industry is at a critical stage where the adoption of advanced CNC technology is not just beneficial but necessary. With continuous innovation and collaboration, China's bearing sector can achieve sustainable growth and become a global leader in high-quality, high-precision bearing manufacturing.

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