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As the demand for more efficient and precise machinery grew, so did the demand for bearings that could withstand even greater stresses6308 zz bearing. The 6308 ZZ bearing was soon modified to include features like improved seals, higher precision races, and optimized ball shapes. These enhancements not only increased the bearing's load capacity but also reduced noise and vibration, making it suitable for use in high-precision applications such as robotics and aerospace.