STN ATLAS SEIDEL SM 56-M Servo Motor with Sumitomo F2CS-A25G-89 Gear
The STN ATLAS SEIDEL SM 56-M Servo Motor with Sumitomo F2CS-A25G-89 Gear is an integrated drive assembly for precise motion control. It combines a permanent magnet servo motor with a Sumitomo Fine Cyclo reducer. The motor provides fast response, smooth rotation and accurate speed regulation. The gearbox provides high torque multiplication and low backlash. Together they support demanding positioning tasks in industrial machinery.
Servo Motor Characteristics
The SM 56-M servo motor is designed for closed loop control. It receives command signals from a servo drive and uses feedback from an encoder or resolver. The drive compares the command with the actual position or speed and adjusts power to reduce error. This allows smooth acceleration, stable speed and accurate stopping. The motor is suitable for frequent starting, reversing and high duty cycles.
Sumitomo F2CS-A25G-89 Gearbox
The F2CS-A25G-89 is a precision cycloidal reducer. It uses rotating discs and ring pins to transmit motion. The design distributes load over multiple contact points. This provides high torque capacity, good shock resistance and compact size. Low backlash construction helps maintain positioning accuracy. The gearbox is matched to the motor flange and shaft for correct alignment.
Performance Benefits
The combination of servo motor and precision gearbox offers high torque in a compact package. It supports accurate motion in forward and reverse directions. The reducer helps reduce speed while increasing output torque. This allows a smaller motor to drive heavier loads. The assembly is suitable for applications that require repeatable positioning and stable operation.
Applications
Typical applications include machine tools, industrial robots, packaging machinery, printing equipment, material handling and automated production lines. The unit can be used in new designs or as a replacement in compatible systems. It is suitable for axes that require precise control, high torque and reliable performance.
Installation Notes
Installation should follow the equipment manual. The mounting surface should be clean and flat. Bolts should be tightened evenly and to the correct torque. The motor shaft and gearbox input must be aligned carefully. Excessive force during assembly can damage bearings or gears. Electrical connections should match the servo drive requirements. After installation, check rotation direction and feedback signals before connecting the load.
Lubrication and Cooling
The gearbox requires correct lubrication. Grease or oil type depends on the model and application. The motor should have sufficient airflow for cooling. Dust, heat and moisture can reduce service life. In harsh environments, guards or enclosures may be needed. Seals should be checked for leaks.
Maintenance
Regular maintenance includes checking for leaks, noise, vibration and temperature. Worn seals should be replaced. Bearings and gears should be inspected during major service. Electrical connections should be checked for tightness and signs of overheating. Following the service schedule helps maintain reliable operation.
Conclusion
The STN ATLAS SEIDEL SM 56-M Servo Motor with Sumitomo F2CS-A25G-89 Gear is a precision drive assembly for industrial motion control. It provides accurate positioning, high torque and dependable performance. Correct selection, installation and maintenance help ensure long service life.




