Servo motor bearings are critical support components for precision motion control; their core functions can be summarized as follows:
**Load Bearing and Support:** They withstand both the radial loads generated by the rotor and the axial loads from external transmission systems, preventing shaft misalignment and ensuring coaxiality during high-speed start-stop cycles and variable-speed operation.
**Friction Reduction and Efficiency Enhancement:** Through precision raceways and rolling elements, they reduce the friction coefficient to a range of 0.001–0.003, significantly minimizing energy loss and heat generation, thereby improving motor efficiency and extending service life.
**Precision Assurance:** They maintain rotational stability with micron-level low runout (e.g., P4-class radial runout ≤0.003 mm), ensuring that encoders accurately capture position and speed signals; this provides the foundation for closed-loop control and prevents positioning errors.
Compared to standard motor bearings, servo motor bearings prioritize high rigidity, low vibration and noise, and high-frequency dynamic response capabilities to meet the demands of rigorous operating conditions requiring millisecond-level response times and repetitive positioning accuracy of ±0.01 mm.
