Bosch Rexroth MHD112B-058-PG0-AN Servo Motor Product Introduction

Overview

The Bosch Rexroth MHD112B-058-PG0-AN (Order Code: R911281777) is a high-performance synchronous servo motor designed for precision motion control in industrial automation. Part of the MHD series, this motor combines robust mechanical design with advanced thermal management to deliver reliable performance in demanding applications. Its natural cooling system and IP65 protection make it suitable for harsh environments, while its high torque density and dynamic response enable precise positioning in complex systems.

Technical Specifications

Key Features

1. High Dynamic Performance:
   • Rated torque of 13.8 Nm and peak current of 117 A enable rapid acceleration.
   • Suitable for applications requiring frequent starts/stops, such as CNC machining centers.
2. Advanced Thermal Management:
   • Natural cooling system maintains optimal temperatures during extended operation.
   • Overload protection at 60K motor casing temperature ensures safe operation.
3. Precision Control:
   • Digital Servo Feedback (HSF) encoder provides sub-micron positioning accuracy.
   • Relative position detection supports synchronization in multi-axis systems.
4. Robust Construction:
   • IP65-rated housing protects against dust and liquid ingress.
   • Keyed shaft design withstands high radial loads for direct gear/pulley mounting.
5. Safety and Reliability:
   • Integrated overtemperature monitoring prevents motor damage.
   • Lifetime lubricated bearings reduce maintenance requirements.

Applications

The MHD112B-058-PG0-AN excels in:

• CNC Machining:
  • Powers five-axis systems for aerospace component manufacturing.
  • Provides precise spindle control in high-speed milling machines.
• Printing Systems:
  • Drives print cylinder motors in commercial web presses.
  • Ensures consistent tension control in label printing machines.
• Material Handling:
  • Powers delta robots in electronic component assembly lines.
  • Enables precise positioning in automated storage/retrieval systems.
• Renewable Energy:
  • Controls pitch mechanisms in wind turbine generators.
  • Provides reliable operation in solar tracking systems.
• Food Processing:
  • Drives mixer blades in dairy processing plants.
  • Withstands frequent washdowns in meat processing facilities.

Design Advantages

• Compact Integration:
  • Frame size 112 and length B allow installation in space-constrained environments.
  • Flange design compliant with DIN 42948 ensures easy machine integration.
• Energy Efficiency:
  • Natural cooling reduces power consumption compared to forced-air systems.
  • High torque-to-current ratio (1.62 Nm/A) minimizes operational costs.
• Thermal Stability:
  • Operates reliably in 0°C to 40°C environments.
  • Maintains performance at altitudes up to 1000m MSL.
• Connectivity:
  • Supports digital communication protocols (EtherCAT, SERCOS).
  • Compatible with Bosch Rexroth’s IndraDrive controllers.

Maintenance and Service

• Long Service Life:
  • Sealed construction prevents contamination from dust/liquids.
  • Thermal time constant of 60 minutes ensures stable long-term operation.
• Ease of Maintenance:
  • Modular design allows quick replacement of power cables/connectors.
  • Diagnostic-friendly encoder feedback simplifies troubleshooting.

Comparison with Previous Models

Unlike earlier MHD series motors (e.g., MHD112B-024-NP1-AN), the MHD112B-058-PG0-AN features:

• Higher Rated Power: 4.4 kW vs. 2.4 kW in comparable models.
• Increased Peak Current: 117 A vs. 98 A, enhancing overload capacity.
• Extended Speed Range: 4500 max RPM vs. 3500 RPM in previous versions.

Conclusion

The Bosch Rexroth MHD112B-058-PG0-AN servo motor is a versatile solution for industrial automation, offering exceptional power, precision, and durability. Its natural cooling design and IP65 rating make it ideal for demanding environments, while the digital feedback system ensures accurate motion control. With proven performance in sectors like CNC machining, printing, and renewable energy, this motor exemplifies Rexroth’s commitment to innovation in motion control.