Description
1. Unboxing & Physical Snapshot
- Model & Brand: Bosch Rexroth IndraDyn S Synchronous Servo Motor (Model Designation: MSK050C-0300-NN-M1-UG1-NNNN)
- Physical Dimensions: Industrial cylindrical motor frame size 050, length C profile (Approx. 280 mm total length x 95 mm flange diameter format)
- Estimated Shipping Weight: 5.20 kg (Net motor weight; factor approximately 7.5 kg for secure heavy industrial double-walled transit cartons with custom foam inserts)
- What’s in the Box: Synchronous servo motor assembly featuring natural convection cooling, multi-turn absolute Hiperface encoder feedback, smooth shaft with shaft sealing ring, integrated electrical release holding brake, rotatable quick-disconnect power/signal connectors, and safety documentation.
2. Product Introduction
Precision industrial automation systems—such as automated assembly cells, semiconductor manufacturing equipment, and high-speed packaging machinery—demand compact, highly responsive motion control components. The Bosch Rexroth MSK050C-0300-NN-M1-UG1-NNNN is an advanced synchronous servo motor from the IndraDyn S product family, engineered to deliver exceptional torque density and precise closed-loop positioning. (Always lock out drive power and verify that the motor shaft has come to a complete standstill before performing mechanical maintenance.)
Motion control engineers rely on the MSK series for its robust overload capability, electronic nameplate data recognition, and reliable holding brake performance. Verifying drive controller compatibility, feedback cable shielding, and mechanical alignment prior to coupling ensures smooth, vibration-free operation across demanding industrial production lines.
3. Core Technical Specifications
| Parameter | Value |
| Product Family | Bosch Rexroth IndraDyn S Synchronous Servo Motors |
| Catalog / Part Number | MSK050C-0300-NN-M1-UG1-NNNN |
| Motor Size & Length | Frame Size 050, Length C |
| Winding Code / Speed | 0300 Winding designation |
| Cooling Type | Natural Convection (Free convection cooling) |
| Feedback Type | Multi-turn absolute encoder (Hiperface protocol, 128 signal periods) |
| Shaft & Sealing | Plain shaft with integrated shaft sealing ring |
| Holding Brake | Electrically released holding brake integrated |
| Net Weight | Approx. 5.20 kg |
4. Global Compliance & Industry Certifications
- Expected Regulatory Standards: CE Mark, UL Recognized, cUL conformity, EAC, and compliance with low-voltage and EMC directives.
- Safety Context: Integrated thermal sensors (PTC/KTY) built into the stator winding protect the motor against thermal overload, preventing insulation breakdown and potential fire hazards in continuous-duty applications.
- Audit Directive: Confirm factory test certificates, certificate of conformity, and traceability documents with authorized Rexroth distributors before commissioning servo motors in regulated manufacturing cells.
5. Long-Term Storage & Asset Preservation Guide
- Store the servo motor in a clean, dry, climate-controlled warehouse environment where ambient relative humidity remains below 60% non-condensing.
- Keep the protective plastic cap fitted securely over the machined output shaft to prevent rust, mechanical scratching, or impact damage to seating surfaces.
- Rotate the motor shaft manually by a few turns every six months to distribute bearing grease evenly and prevent localized raceway corrosion.
6. Physical Installation Prerequisites
- Ensure the mechanical mounting flange and mating gearbox or machine bed are clean, flat, and free of burrs or heavy contamination.
- Align the motor shaft precisely with the driven load using a precision dial indicator or laser alignment tool to eliminate radial and axial bearing side-loads.
- Torque all mounting bolts strictly to manufacturer specifications using a calibrated wrench, and ensure the motor frame is bonded securely to the machine earth ground grid.
7. Buyer’s FAQ (Logistics & Compliance Focus)
- Q: What Harmonized System (HS) code applies to this servo motor for international customs clearance?
A: Use HS code
8501.52(AC motors, multi-phase, of an output exceeding 750 W but not exceeding 75 kW). - Q: What do the designations “UG1” and “M1” signify in the part number?
A: “M1” indicates a multi-turn absolute Hiperface optical encoder, while “UG1” designates a smooth shaft equipped with a sealing ring and an integrated electrically released holding brake.
- Q: Is specialized transit insurance required when shipping high-precision industrial servo motors?
A: Yes, full-value freight insurance is strongly recommended due to the precision mechanical bearings and high replacement value of Rexroth servo drives.
- Q: What is the verified Country of Origin (COO) for import documentation?
A: Manufactured primarily in Germany; inspect the exterior factory nameplate label to confirm exact manufacturing provenance prior to customs filing.




