The REXRTOH MSK070D-0450-NN-M1-UP1-NSNN represents a powerful member of the MSK series of synchronous servo motors, engineered to deliver superior torque output for demanding industrial automation tasks. With its larger 070D frame size, this motor is designed to handle applications requiring significant mechanical power while maintaining the precision and dynamic response characteristic of the MSK family. The comprehensive model code precisely defines its performance envelope, mechanical configuration, and standard features, making it an ideal choice for system integrators designing high-performance motion axes.
At the core of the MSK070D is advanced permanent magnet synchronous motor technology. The rotor incorporates high-grade permanent magnets that create a strong, consistent magnetic field. When paired with a precisely controlled three-phase current in the stator windings—supplied by a compatible servo drive—the interaction generates substantial torque with high efficiency. This design achieves an excellent power density, allowing for a compact motor footprint relative to its output. The technology ensures smooth operation across the entire speed range, including at low speeds and standstill, providing stable performance for both high-speed movements and precise positioning.
The detailed model number provides a complete technical specification:
MSK070D: Identifies the motor series (MSK) and the specific frame size (070D). The "070D" indicates a larger physical frame than the 060C variant, typically corresponding to higher continuous and peak torque ratings.
0450: Specifies the motor's rated speed or a key performance parameter. In this context, "0450" often corresponds to a rated speed (e.g., 4500 rpm) and defines the motor's base speed for nominal operation.
NN: Denotes standard options for brake and feedback. The first 'N' typically indicates no integrated holding brake. The second 'N' specifies a standard, high-resolution feedback system, such as a single-turn or multi-turn absolute encoder.
M1: Defines the mechanical flange interface, including its type, dimensions, and mounting pattern, ensuring compatibility with standard couplings and mechanical assemblies.
UP1: Specifies the shaft design and sealing. This includes the shaft geometry (e.g., with keyway per standard), shaft sealing to prevent ingress, and the resulting ingress protection (IP) rating.
NSNN: A set of variant codes specifying additional standard features, which may include standard winding, standard connector type, and standard surface finish/paint.

Based on the MSK series standards and the model code interpretation, the following core specifications are defined:
| Parameter / Code Segment | Interpretation / Typical Specification |
|---|---|
| Motor Type | Permanent Magnet Synchronous Servo Motor (MSK Series) |
| Frame Size | 070D (Larger frame for higher torque output) |
| Rated Speed / Performance Code | Defined by "0450" (e.g., 4500 rpm base speed) |
| Holding Brake | Not included (as indicated by 'N' in 'NN') |
| Feedback System | Integrated high-resolution absolute encoder (type defined by 'N' in 'NN'), providing precise position and speed feedback. |
| Flange Standard | According to M1 specification (standardized industrial flange) |
| Shaft Design | Standard shaft with keyway and sealing per UP1 code |
| Protection Class | Typically IP65 or higher as defined by shaft sealing (UP1) |
| Cooling Method | Natural convection (surface cooling) for standard operation. |
The MSK070D motor is designed for seamless integration with digital servo drives from the Rexroth IndraDrive family and other compatible amplifiers. The motor's integrated absolute encoder connects directly to the drive, providing critical real-time data for precise commutation, velocity control, and position regulation. This closed-loop architecture allows the drive to fully exploit the motor's high-torque capabilities while maintaining exceptional control accuracy. Proper sizing and pairing with a correctly rated drive are essential to achieve the specified performance and ensure reliable, long-term operation.
The high torque output and robust construction of the MSK070D make it suitable for demanding applications:
Machine Tools: Driving large rotary tables, heavy-duty milling spindles, and the main axes of large CNC machining centers and lathes.
Presses and Stamping Machines: Providing the high torque needed for press rams, feeder systems, and material handling in metal forming.
Plastics Processing: Driving screws in large injection molding machines and extruders requiring substantial rotational force.
Material Handling: Powering heavy-duty conveyor drives, palletizers, and automated storage/retrieval system (AS/RS) drives.
Test and Simulation Equipment: Serving as the prime mover in large dynamometers, fatigue testers, and environmental simulators requiring high force.
Renewable Energy: Used in positioning systems for solar tracking or component testing in wind turbine manufacturing.
The REXRTOH MSK070D-0450-NN-M1-UP1-NSNN synchronous servo motor is engineered to meet the challenges of high-torque, precision motion control. Its combination of a robust mechanical design, advanced permanent magnet technology, and precise integrated feedback provides a reliable and powerful solution for heavy-duty automation axes. By offering substantial torque in a compact frame, it enables machinery designers to achieve both high performance and space efficiency. For complete performance curves, detailed dimensional drawings, and specific connection instructions for this exact model, consulting the official MSK series technical documentation is highly recommended.



