Rexroth Synchronous Servo Motor MHD071B-035-PG0-UN (Order Number R911273364)

Overview

The Bosch Rexroth MHD071B-035-PG0-UN is a synchronous AC servo motor designed for demanding industrial applications where precision, reliability, and robustness are critical. Belonging to the MHD series, this motor features a medium-length housing, natural convection cooling, a shaft with keyway, and encoder-based feedback. Its PG0 configuration specifies a shaft with keyway, encoder, and no holding brake, making it well-suited for dynamic applications where continuous holding is unnecessary.

The type code provides detailed insights:

• 071 → Motor frame size with 115 mm flange and 95 mm centering diameter.

• B → Medium-length housing, offering increased torque output over the “A” version.

• 035 → Winding configuration optimized for 2500 rpm nominal speed.

• PG0 → Shaft with keyway and encoder, without holding brake.

• UN → Universal, rotatable connectors and natural convection cooling.

The dedicated order number R911273364 identifies this motor precisely for procurement and replacement purposes.

Key Features

1. High Torque Density

   • Continuous standstill torque: 8.0 Nm under 60K overtemperature rise.

   • Peak torque capability up to 32.0 Nm, providing strong overload performance.

2. Optimized Speed and Efficienc

   • Nominal and characteristic motor speed: 2500 rpm.

   • Rated power output up to 1.6 kW under natural cooling.

   • Voltage constant at 20 °C: 125 V/1000 rpm, supporting efficient drive compatibility.

3. Encoder Precision

   • Digital servo feedback encoder ensures highly accurate position and speed control.

   • Compatible with Rexroth IndraDrive and EcoDrive systems, simplifying integration.

4. Compact, Robust Design

   • IP65 protection against dust and water jets.

   • Insulation class F guarantees long thermal endurance.

   • Medium housing (B) balances compactness with torque capacity.

5. Flexible Installation

   • DIN-standard flange for compatibility with machine tools and automation systems.

   • Rotatable connectors ease wiring in space-limited setups.

   • Plug-and-play commissioning supported by encoder memory.

Technical Data (MHD071B-035-PG0-UN)

Applications

The MHD071B-035-PG0-UN is designed for a wide range of industrial applications, such as:

• Machine Tools: Auxiliary drives, positioning spindles, tool changers.

• Packaging Systems: Precise motion in labeling, filling, sealing, and wrapping.

• Robotics: Articulated arm drives, indexing units, and compact manipulators.

• Printing and Paper: Rollers, feeders, and cutting systems requiring exact synchronization.

• Textile Machinery: Continuous processes requiring steady torque and repeatability.

• Material Handling: Conveyor drives and automated sortation equipment.

Design and Construction

The motor’s design incorporates Bosch Rexroth’s proven synchronous servo technology:

• Rotor: Permanent magnet rotor for compact size and high torque density.

• Stator: Precision copper windings for reduced energy loss.

• Encoder: Provides closed-loop servo feedback for precision motion.

• Housing: Rigid aluminum body with black RAL 9005 primer coat.

• Bearings: Lifetime-lubricated, minimizing maintenance requirements.

This construction ensures durability, smooth torque delivery, and operational longevity.

Advantages for End Users

• Compact Yet Powerful: Medium-length housing maximizes torque without excessive bulk.

• Low Maintenance: Brushless motor with sealed bearings.

• High Accuracy: Encoder-driven feedback ensures precision.

• Safe and Reliable: Overload protection, IP65 sealing, insulation class F.

• Integration-Friendly: Rotatable connectors and standardized flange simplify setup.

Ordering Information

• Product Name: Rexroth Synchronous Servo Motor MHD071B-035-PG0-UN

• Order Number: R911273364

• Series: Rexroth MHD Synchronous Servo Motors

Conclusion

The Bosch Rexroth MHD071B-035-PG0-UN (R911273364) is a medium-length synchronous servo motor designed to deliver powerful torque, precise control, and dependable performance. With its PG0 configuration—shaft with keyway, encoder, and no holding brake—it provides a balanced solution for applications where continuous holding is unnecessary but dynamic precision is vital.

This motor is a strong choice for machine tools, packaging machinery, robotics, printing, textiles, and material handling systems, offering long-term reliability and reduced operational costs. Backed by Bosch Rexroth’s engineering expertise, it ensures a long service life, high efficiency, and seamless integration into modern automation environments.