**Analysis: Development of the Bearing Industry and the Need for CNC Equipment**
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*Source: China Bearing Network | Time: February 1, 2013*
In the manufacturing process of bearings, a wide range of high-precision molds are required, including stamping dies for steel plates, clamping dies for plastic retainers, stamping dies for rolling elements, high-precision drawing dies for needle bearing outer rings, cold rolling and casting dies for bearing rings, as well as installation molds. All of these require efficient and precise CNC equipment. However, domestic CNC machines often fail to meet the required standards in terms of performance and accuracy. As a result, some high-precision mold CNC equipment is imported, while others use low-cost or modified equipment to cope. Despite the huge demand for such equipment, the 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 operating with fully automated grinding systems. These advancements have significantly improved the quality of low-noise motors. The full-active grinding line is now expanding from miniature and small bearings to medium and large ones. As demands become more diverse and complex, advanced techniques such as active measurement, off-line testing, error compensation, real-time quality monitoring, and CNC transmission are becoming essential.
Bearing installation, including active detection and packaging, has long been a challenge for technological advancement. While foreign companies have successfully implemented these systems for years, domestic adoption has been unsatisfactory. Therefore, developing an integrated bearing installation line that connects with the grinding production line is crucial. This reduces manual intervention, lowers costs, and improves overall production efficiency and product quality. Given the variety of bearings, each with unique requirements, the need for diversified CNC equipment in installation processes is growing.
The production of bearing rollers in China still relies heavily on single-machine operations. In contrast, leading international companies use automated grinding lines. A few Chinese firms have introduced Japanese equipment, but high costs and depreciation make widespread adoption difficult. Bearings require extremely tight tolerances—1–2 microns for standard rollers, and less than 1 micron for 0-level rollers. Surface quality is even stricter. Therefore, the industry urgently needs reliable, high-precision CNC equipment. Active grinding lines and rust-proof packaging lines must also be equipped with error compensation and real-time monitoring systems.
Steel balls, the most commonly used rolling elements, undergo active removal, appearance inspection, anti-rust treatment, and packaging. While foreign manufacturers have long adopted automated lines, China has made progress after over a decade of effort, though it still lags behind global leaders. Steel balls require nanometer-level precision, higher surface quality, and large-scale production. This demands high-performance, high-reliability, and clean equipment. As a result, digital technologies are becoming a key direction for the bearing industry, with CNC-based equipment being the preferred choice for modernization.
The bearing industry faces several key needs regarding CNC equipment:
- **High reliability and timely after-sales service**: This is especially critical due to the continuous and large-volume nature of bearing production. Any issue with a CNC machine can halt the entire line, causing significant losses.
- **Specialized automation**: Domestic equipment may be available, but it lacks the precision, rigidity, and stability needed. Continuous improvements are necessary to meet industry demands.
- **Long-term high-speed operation**: Many companies run 24/7, requiring equipment that can operate efficiently for extended periods with minimal downtime. Features like fault alarms, quick diagnosis, and rapid troubleshooting are essential.
- **Collaboration between industries**: Close cooperation between CNC equipment providers and bearing manufacturers will lead to mutual growth and better production outcomes.
As the national economy and industrial technology continue to develop, the demand for bearings across various sectors is increasing. Bearings with high precision, large quantities, and specialized applications are in greater need. This trend highlights the importance of advancing CNC technology in the bearing industry. By improving production efficiency, reducing costs, and expanding exports, CNC equipment will play a vital role in shaping the future of the sector.
In conclusion, the development of the bearing industry is closely tied to the advancement of CNC technology. With the right tools and strategies, China can significantly enhance its competitiveness in the global market.
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