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Roundness error ≤ 0.005 mm, end face parallelism ≤ 0.01 mm, ensuring stable operation under high speed or heavy load, reducing vibration and misalignment. Inner and outer diameter surface roughness Ra 0.4–0.8 μm, effectively reducing the coefficient of friction, minimizing energy loss, and suppressing operating noise. Optimized structure and high material strength allow it to withstand large radial and axial loads; deburring of edges ensures safe assembly and prevents damage to mating parts. Surface anti-rust coating or passivation treatment provides resistance to moisture and high temperatures, extending service life. High wear resistance reduces maintenance frequency. Suitable for fully automated equipment, industrial machinery, and precision instruments. Inner diameter, outer diameter, height, and material can be customized upon request.