Overview
The Gerwah ADS GS38/45 flexible coupling (model ADS/R 28) is a precision servo coupling engineered for applications requiring high positional accuracy and zero-backlash torque transmission. Manufactured by GERWAH, a leader in high-precision couplings for over 30 years, this unit combines aluminum construction with elastomeric damping to handle misalignment while protecting connected equipment from shock and vibration.
Key Features
- Zero-backlash design for precise servo motor and actuator applications
- Aluminum hubs with pre-tensioned elastomer spider for interference-fit assembly
- Compensates for angular, axial, and radial shaft misalignment
- Maintenance-free operation—no lubrication or cleaning required
- Vibration damping and shock absorption for extended component life
- Heavy-duty construction suitable for industrial servo systems and high-speed drives
Technical Specifications
- Series: ADS / ADS/R
- Size: GS38/45
- Coupling Type: Flexible jaw coupling with elastomer spider
- Material: Aluminum hubs with elastomeric insert
- Backlash: Zero backlash
- Outer Diameter: 80 mm
- Nominal Torque Capacity: Up to 325 Nm (standard 98 ShA spider)
- Misalignment Compensation: Angular, axial, radial
- Lubrication: Maintenance-free
- Certifications: ISO 9001
Typical Applications
The Gerwah ADS GS38/45 is widely used in:
- Servo motor drives and precision motion control systems
- Industrial robotics and automated assembly equipment
- Machine tool spindles and CNC systems
- Conveyor systems and material handling equipment
- Printing and textile machinery
- Test stands and measurement equipment requiring backlash-free operation
Compatibility & Replacements
Compatible With
- Servo motors and standard AC induction motors (via shaft-to-shaft connection)
- Industrial automation systems using servo control
- High-precision machinery requiring zero-backlash torque transmission
- Systems operating at variable speeds with misaligned shafts
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The ADS/R 28 designation indicates this unit may be compatible with earlier ADS series models; confirm bore diameters and torque requirements with the original equipment documentation.
Works With
- Servo motor shaft coupling applications
- Industrial encoder and feedback device integration
- Direct-drive and gearbox output shafts
- Stepper motor and stepper drive systems
- Any machinery requiring precision shaft alignment and vibration isolation




