Bosch Rexroth MHD112D-027-PG0-AN Synchronous Servo Motor for High-Performance Motion Control Applications

Bosch Rexroth MHD112D-027-PG0-AN Synchronous Servo Motor

The Bosch Rexroth MHD112D-027-PG0-AN represents a high-caliber synchronous servo motor engineered for precision, reliability, and superior performance in demanding motion control applications. As part of the renowned MHD series, this model integrates advanced design features, exceptional dynamic response, and seamless compatibility with Rexroth’s digital drive systems. It is particularly suited for applications requiring exact positioning, high torque, and operational durability, such as advanced automation systems, precision machining, and high-speed industrial processes.

Overview

The MHD112D-027-PG0-AN is a variant within the MHD112 motor family, designed to deliver high torque density and excellent overload capabilities. This model stands out with its integrated multiturn absolute encoder, which ensures accurate position feedback without the need for homing after power cycles. This feature significantly enhances operational efficiency and reduces downtime in automated systems.

The motor is built to meet rigorous industrial standards, offering robust construction, flexible cooling options, and a high degree of protection against environmental factors. Its compatibility with Rexroth’s drive controllers allows for automated parameterization and optimized performance straight out of the box.

Key Features

1. Multiturn Absolute Encoder
   The PG0 variant includes a high-resolution absolute encoder that retains position information over multiple revolutions (up to 4096 turns), eliminating the need for re-homing after power interruption. This is critical for applications requiring uninterrupted operation and precise positioning.

2. High Dynamic Performance
   The motor offers low rotor inertia and high torque acceleration, enabling rapid response and precise control in dynamic applications such as robotics, packaging, and CNC machinery.

3. Robust and Durable Design
   With a standard protection class of IP65, the motor is resistant to dust and water jets. Optional sealing air connections can be used to enhance protection in harsh environments involving coolants, oils, or other contaminants.

4. Thermal Management
   The motor supports multiple cooling methods, including natural convection, surface cooling via an attached blower, and liquid cooling for high-duty-cycle applications. This ensures stable performance even under continuous operation.

5. Safety and Compliance
   The motor is equipped with optional holding brakes for safe operation in vertical axes or emergency stopping. It complies with CE and UL standards (UL file number E163211), ensuring adherence to international safety and EMC directives.

6. Plug-and-Play Integration
   The motor’s encoder stores all necessary parameters, allowing for automatic configuration when connected to a compatible Rexroth drive controller. This reduces setup time and minimizes potential errors.

Technical Specifications

Design and Mechanical Construction

The MHD112D-027-PG0-AN features a B05 flange mounting design per DIN 42950, supporting installation in various orientations (IM B5, V1, V3). The motor is balanced at the factory with a plain output shaft, ensuring smooth operation and compatibility with clamping elements or shrink discs. A keyway option is available for applications requiring positive torque transmission.

The housing is coated with a black primer (RAL 9005) that resists weathering, chemicals, and UV exposure. A radial shaft seal (DIN 3760, Type A) protects the bearing and internal components from contaminants.

Application Areas

• Precision Automation: Robotics, pick-and-place systems, and assembly lines

• Machine Tools: CNC machining centers, lathes, and grinders

• Packaging Technology: High-speed wrappers, fillers, and labelers

• Printing and Paper Handling: Precision web guidance and tension control

• Medical Equipment: Imaging systems, automated analyzers, and surgical robots

Integration and Control Compatibility

The motor is designed to operate with Rexroth’s digital drive controllers, such as the HDC, HDS, or DKC series. The absolute encoder enables continuous position tracking without battery backup, simplifying system design and improving reliability.

Pre-configured cable sets are available for power and feedback connections, reducing installation time and ensuring signal integrity. The motor can also be equipped with optional connectors for sealing air or liquid cooling.

Environmental and Operational Limits

• Ambient Temperature Range: 0°C to +45°C (derating required beyond this range)

• Max. Altitude: 1000 m above sea level (derating applied above)

• Vibration Resistance: Conforms to IEC 60721-3-3, class 3M1 (longitudinal) and 3M6 (transverse)

• Cooling Methods: Natural convection, forced air (blower), or liquid cooling

Ordering and Accessories

The MHD112D-027-PG0-AN can be ordered with a range of accessories:

• LEMD-series blowers for enhanced surface cooling

• Electrically released holding brake for safety compliance

• Sealing air connector kit for improved IP protection

• Liquid cooling accessories for high-performance applications

Complete technical documentation, including dimensional drawings and connection details, is available under reference DOK-MOTOR-MHD*****-PRO5-EN-P.

Conclusion

The Bosch Rexroth MHD112D-027-PG0-AN synchronous servo motor is a top-tier solution for applications demanding high precision, reliability, and ease of integration. Its absolute encoder technology, robust construction, and flexible cooling options make it an ideal choice for advanced automation systems across various industries. With global certifications and extensive support, this motor ensures long-term performance and operational safety.