Rexroth MHD041B-144-PG0-UN Compact and High-Performance Synchronous Servo Motor for Mid-Range Automation Applications

Rexroth MHD041B-144-PG0-UN Synchronous Servo Motor Product Introduction
(Order Code: R911274053)

1. Executive Summary

The Rexroth MHD041B-144-PG0-UN (order code R911274053) is a cost-effective, high-precision synchronous servo motor designed for mid-range automation applications. With a focus on energy efficiency and compact integration, this model offers a streamlined alternative to the PG1-UN variant, featuring optimized torque-current ratios and reduced thermal footprint. Ideal for conveyor systems, light CNC operations, and packaging machinery, it delivers reliable performance in ambient temperatures up to 40°C while maintaining IP65 protection.

2. Technical Specifications

3. Key Differentiators from PG1-UN

• Lower Continuous Torque: 1.3 Nm vs. 2.7 Nm (PG1-UN), optimized for light-duty cycles.
• Reduced Current Draw: 3.5 A continuous current vs. 7.5 A (PG1-UN), lowering energy costs.
• Higher Base Speed: 7,000 min⁻¹ characteristic speed vs. 6,000 min⁻¹ (PG1-UN), enabling faster positioning.
• Cost Efficiency: 15–20% lower price point than PG1-UN, targeting budget-conscious projects.

4. Electrical & Mechanical Design

• Winding Configuration: High-resistance design (7.0 Ω) minimizes inrush currents, ideal for systems with limited power capacity.
• Connector System:
  • Power: INS0480 connector for 48V–230V applications.
  • Encoder: INK0448 digital interface (Hiperface DSL) for 17-bit resolution.
• Shaft Design: Plain shaft with optional keyway (DIN 6885-1) for direct coupling.
• Mounting: Flange-mounted per DIN 42948, using M6 screws at 10 Nm torque.

5. Installation & Commissioning

Step 1: Mechanical Mounting

• Align the motor flange with the drive system using a 4-point M6 screw pattern.
• Tighten screws to 10 Nm ±10% using a torque wrench.

Step 2: Electrical Connections

• Connect the INS0480 power cable to the motor terminal block.
• Attach the encoder cable to the INK0448 port, ensuring IP65 sealing.

Step 3: Parameterization

• Configure the drive controller with:
  • Rated voltage: 163 V
  • Pole pairs: 3
  • Torque constant: 38.2 Nm/A (crest)

6. Maintenance & Service

• Cooling System: Clean ribs monthly with compressed air to prevent thermal derating.
• Bearing Service: Replace every 30,000 hours (L10h) or if noise occurs.
• Connection Audit: Inspect cables biannually for wear, especially in high-flex applications.
• Brake Testing: Verify holding brake torque quarterly (1.2 Nm nominal).

7. Environmental & Safety Compliance

• Certifications: CE marked, cUR listed (UL 508C).
• EMC: Complies with EN 61800-3 for industrial environments.
• Vibration Resistance: Meets DIN EN 60034-7 for up to 2.5 mm/s² RMS.

8. Applications

• Conveyor Systems: Precision indexing for food packaging lines.
• Light CNC Machining: Spindle drives for engraving/routing.
• Material Handling: Robotic arm joints in pick-and-place systems.
• Textile Machinery: Tension control for yarn processing.

9. Sales Proposition

• Competitive Pricing: Ideal for OEMs seeking Rexroth quality at lower cost.
• Stock Availability: Ready to ship from Bosch Rexroth distribution centers.
• Warranty: 24-month standard warranty, extendable with maintenance contracts.

Conclusion
The MHD041B-144-PG0-UN servo motor bridges the gap between performance and affordability, offering a robust solution for mid-tier automation. Its optimized torque-current profile and IP65 rating make it a versatile choice for global deployments.