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Rexroth R911316378 MSK050B-0300-NN-S1-UP1-NNNN Servo Motor
| Place of Origin | Germany |
| Brand Name | REXROTH |
| Certification | CE |
| Model Number | MSK050B-0300-NN-S1-UP1-NNNN |
Product Overview
The Rexroth R911316378 is an IndraDyn S synchronous servo motor with the complete type code MSK050B-0300-NN-S1-UP1-NNNN. It is configured for compact industrial servo axes requiring precise feedback, reliable keyed-shaft torque transmission and static load holding when the drive is disabled.
This specific configuration combines natural-convection cooling, an optical single-turn Hiperface encoder, a rotatable electrical connector, a keyed shaft with shaft sealing ring and an electrically released holding brake. The NNNN suffix identifies the standard motor design.
Configuration Highlights
- MSK050B frame with 0300 winding
- Natural-convection cooling without an external fan
- Optical single-turn Hiperface encoder with 128 signal periods
- Rotatable connector for practical cable orientation
- Keyed shaft according to DIN 6885-1 with shaft sealing ring
- Electrically released holding brake for static holding
- Standard NNNN mechanical design
- IP65 motor protection when correctly installed
Technical Specifications
| Material Number | R911316378 |
| Complete Model | MSK050B-0300-NN-S1-UP1-NNNN |
| Motor Type | Permanent-Magnet Synchronous Servo Motor |
| Cooling | Natural Convection |
| Encoder | S1 Optical Single-Turn Hiperface, 128 Signal Periods |
| Electrical Connection | Rotatable Connector, Approximately 240 Degrees |
| Shaft | Keyway According to DIN 6885-1 With Shaft Sealing Ring |
| Holding Brake | Electrically Released, 6 Nm Reference Holding Torque |
| Continuous Standstill Torque at 100 K | 3.4 Nm |
| Continuous Standstill Current at 100 K | 2.0 A |
| Maximum Torque | 9.0 Nm |
| Maximum Current | 7.2 A |
| Protection Class | IP65 |
| Net Weight | Approximately 4.9 kg |
| Packed Gross Weight | To Be Confirmed |
Model Code Interpretation
MSK050B defines the motor family, frame and length. 0300 is the winding designation. NN indicates natural-convection cooling. S1 identifies the optical single-turn Hiperface encoder. In UP1, U indicates the rotatable connector, P identifies the keyed shaft with sealing ring, and 1 identifies the holding-brake option. NNNN indicates standard design.
Brake and Mechanical Configuration
The keyed shaft provides positive mechanical engagement with a suitable coupling, pulley or gearbox hub. The key, coupling balance, alignment and permissible shaft loading must be checked during installation.
The electrically released holding brake is intended to hold a stationary axis when correctly controlled. It is not designed as a dynamic service brake and must not be used as the sole personnel-safety device.
Typical Applications
This configuration is suitable for compact positioning axes, packaging machines, indexing equipment, assembly stations and handling mechanisms that require a keyed mechanical connection and a holding brake.
Replacement Checklist
- Confirm R911316378 and the complete type code.
- Verify the S1 Hiperface encoder and feedback cable.
- Confirm the keyed shaft and coupling arrangement.
- Check the holding-brake voltage, wiring and control logic.
- Verify connector orientation and motor cable assignment.
- Confirm drive compatibility and controller motor parameters.
Related Models
Relevant alternatives should be selected from other MSK050B-0300 configurations with different shaft, brake or encoder options. MSK050C-0300 models provide a related but mechanically longer motor platform and should not be treated as direct replacements without checking dimensions and performance data.
Inquiry and Supply Notes
For identification, provide the complete motor nameplate, R911 material number, drive model, feedback and power-cable numbers, connector orientation, coupling details and brake requirements. Packed gross weight and current availability should be confirmed before ordering.
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