Rexroth Synchronous Servo Motor MHD041B-144-NG0-UN (Order Number R911286223)

Overview

The Bosch Rexroth MHD041B-144-NG0-UN is a high-performance synchronous AC servo motor belonging to the MHD series, which is widely recognized for its robustness, precision, and flexibility in automation. Designed for dynamic motion control, this model delivers superior torque density, accurate positioning, and long service life, making it suitable for industries such as machine tools, packaging, printing, robotics, and material handling.

Unlike smaller frame variants, the MHD041B motor features a “B” length housing, providing greater continuous torque compared to the “A” length while retaining a compact footprint. With natural convection cooling, a multiturn digital encoder, and a rugged mechanical design, the motor is tailored for industrial environments where both performance and reliability are essential.

Key Features and Benefits

1. Increased Continuous Torque

   • The “B” housing length enables higher torque capacity (approx. 2.7 Nm at standstill ).

   • Suitable for medium-duty applications requiring sustained load capacity.

2. Digital Servo Feedback

   • Integrated NG0 multiturn encoder provides precise position tracking without external battery backup.

   • Ensures smooth operation in high-precision control loops.

3. Robust Construction

   • Shaft designed for direct coupling or overhung loads (pulleys, gears).

   • Bearings are grease-lubricated for life, reducing downtime and service costs.

   • Fully enclosed housing, IP65 rated, for resistance to dust and water spray.

4. Flexibility in Integration

   • Standardized flange dimensions (DIN 42948) simplify replacement and integration.

   • Multiple cable exit options and universal connector orientation allow easy wiring.

5. Safety and Monitoring

   • Built-in temperature sensors prevent thermal overload.

   • Insulation class F ensures long-term thermal endurance.

   • Compatible with Rexroth’s advanced drive controllers for comprehensive system protection.

Technical Data (MHD041B-144-NG0-UN)

The following table summarizes the motor’s key specifications, based on the Rexroth project planning manual :

Applications

The MHD041B-144-NG0-UN is ideal for medium-duty servo applications where higher torque and robustness are required:

• Machine Tools: Positioning of feed drives and auxiliary axes.

• Packaging and Filling Machines: Continuous-duty tasks with higher torque demand.

• Robotics and Automation: Handling arms, indexing tables, and assembly lines.

• Printing and Textile Machinery: Reliable speed control in continuous processes.

• Material Handling: Conveyor systems and palletizing tasks.

Design and Construction

The motor is designed with permanent magnet synchronous technology and electronic commutation, ensuring smooth torque generation and high efficiency.

• Rotor: Equipped with permanent magnets for strong torque density.

• Stator: Precision-engineered windings reduce electrical losses.

• Encoder: NG0 multiturn feedback ensures precise control and reduced installation complexity.

• Bearings: Sealed and lifetime-lubricated to eliminate regular maintenance.

• Housing: Rigid aluminum frame, optimized for heat dissipation under natural convection.

Advantages for End Users

• Higher Torque Density: Compact size with enhanced torque output compared to the “A” variant.

• Reliability in Harsh Environments: IP65 protection ensures safe operation in dusty or wet areas.

• Maintenance-Free: Brushless design and lifetime-lubricated bearings reduce service costs.

• Flexible Installation: Multiple mounting orientations and cable routing options.

• Seamless Integration: Direct compatibility with Rexroth IndraDrive and EcoDrive controllers.

Ordering Information

• Product Name: Rexroth Synchronous Servo Motor MHD041B-144-NG0-UN

• Order Number: R911286223

• Series: Rexroth MHD Series

For optimal system performance, pair with Rexroth servo drives and certified accessories.

Conclusion

The Rexroth MHD041B-144-NG0-UN (R911286223) is a versatile, medium-length synchronous servo motor delivering higher torque output, precise feedback, and robust environmental protection. With its compact footprint, high performance, and maintenance-free operation, it is an excellent choice for OEMs, integrators, and end-users aiming for efficiency, productivity, and reliability in industrial automation systems.

By offering a balance of torque, speed, and durability, this motor is well-suited for applications that demand both accuracy and robustness, reinforcing Rexroth’s position as a global leader in motion control technology.