1. Small friction resistance, small power consumption, high mechanical efficiency, easy to start; 2. Standardized dimensions, interchangeable, easy to install and disassemble, and convenient maintenance; 3. Compact structure, light weight, and even smaller axial size; 4. High precision, large load, small wear, and long service life; 5. Some bearings have the performance of automatic self-aligning; 6. Suitable for mass production, stable and reliable quality, and high production efficiency; 7. The transmission friction torque is much lower than that of fluid dynamic bearings, so the friction temperature rise and power consumption are lower; 8. The starting friction torque is only slightly higher than the rotational friction torque; 9. The bearing deformation is less sensitive to load changes than fluid dynamic bearings; 10. Only a small amount of lubricant is required for normal operation, and lubricant can be provided for a long time during operation; 11. The axial size is smaller than that of traditional fluid dynamic bearings; 12. It can withstand combined radial and thrust loads at the same time;13. The unique design can achieve excellent performance over a wide load-speed range; 14. The bearing performance is relatively insensitive to fluctuations in load, speed and operating speed.