Bosch Rexroth MSM031B-0300-NN-M5-MH1 Synchronous Servo Motor
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Bosch Rexroth MSM031B-0300-NN-M5-MH1 Synchronous Servo Motor with Holding Brake — 60 mm Flange, 0.64 Nm Continuous Torque, 1.91 Nm Peak Torque, 5,000 rpm, Self-cooling, With Holding Brake, M17 Circular Connector, IndraDyn S Series. Compact synchronous servo motor from the Rexroth MSM031B series with 60 mm flange, natural convection cooling, and integrated electrically-releasing holding brake for safe load retention on vertical axes. Multi-turn absolute encoder M5 (20-bit) requires buffer battery for absolute functionality. Compatible with Rexroth IndraDrive Cs drive controllers.
Available in stock — ships within 3 days after payment.
Product overview
| Part number (R-number) | R911344214 |
| Type designation | MSM031B-0300-NN-M5-MH1 |
| Product type | Synchronous servo motor with holding brake — IndraDyn S MSM series |
| Flange size | 60 mm |
| Continuous torque at standstill (60K) | 0.64 Nm |
| Maximum torque | 1.91 Nm |
| Continuous current at standstill (60K) | 1.60 A (rms) |
| Maximum current | 4.90 A (rms) |
| Maximum speed | 5,000 min⁻¹ |
| Torque constant (20°C) | 0.41 Nm/A |
| Back-EMF constant (20°C) | 24.5 V/min⁻¹ |
| Winding resistance (20°C) | 6.10 Ω |
| Winding inductance | 14.700 mH |
| Number of pole pairs | 4 |
| Rotor inertia (without brake) | 1.0 × 10⁻⁵ kg·m² |
| Encoder | Multi-turn absolute — 20-bit (M5); buffer battery required for absolute function |
| Cooling | Self-cooling / natural convection (IC00) |
| Holding brake | Yes — electrically releasing, 24 VDC (±1.2 V), 0.36 A, holding torque 1.27 Nm |
| Brake clamping delay | 50 ms |
| Brake release delay | 15 ms |
| Electrical connection | M17 circular connector (metal plug) |
| Protection rating | IP54 (IEC 60529) |
| Insulation class | 130 (B) — DIN EN 60034-1 |
| Ambient operating temperature | 0 to 40°C |
| Storage / transport temperature | −20 to +60°C |
| Installation altitude | 0 to 1,000 m |
| Weight (with brake) | 1.3 kg |
| Dimensions (with brake, CH1) | A=60, B=115.5, C=30, D=ø11h6, E=ø50h7, F=ø70±0.20, G=ø4.5, H=71 mm |
| Compatible drive controller | Rexroth IndraDrive Cs |
| Standards | UL 1004, ANSI UL 840, CSA-C22.2 No. 100 (UL file E223837) |
| Condition | New — in original packaging |
Applications
- Vertical axis servo drives requiring a holding brake for safe load retention at standstill
- Precision motion control in CNC machines, robotics, and automation systems using Rexroth IndraDrive Cs controllers
- Compact servo axis drives where a 60 mm flange and natural convection cooling are required
- Packaging, assembly, and handling machines requiring compact high-dynamic servo performance up to 5,000 rpm
Shipping
- Ships within 3 days after payment
- Secure packaging for safe delivery
- Free delivery within Germany
Warranty & compliance
- 12-month warranty included
- Product is fully compliant with EU industry standards
- VAT invoice included with every order
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