Perfect New Synchronous Servo Motor Rexroth R911317163 MSK050B-0300-NN-M2-UP0-RNNN Built For Compact Automation

The REXROTH R911317163 MSK050B-0300-NN-M2-UP0-RNNN is a compact IndraDyn S MSK synchronous servo motor designed for precision motion control in industrial automation equipment. This model is part of the MSK050B motor size range and is suitable for applications that require accurate positioning, stable speed regulation, and reliable torque delivery within a relatively compact mechanical envelope.

The order number R911317163 corresponds to the full type code MSK050B-0300-NN-M2-UP0-RNNN, and public supplier listings identify it as a Rexroth IndraDyn S synchronous servo motor.

Unlike larger MSK100 or MSK070 motors, the MSK050B-0300 is a smaller-frame servo motor. Its advantage is not only peak power, but also its compact body, low rotor inertia, and suitability for fast-response axes. Rexroth project-planning data for the MSK050B-0300-NN platform lists 3.0 Nm continuous torque at standstill under 60 K conditions, 3.4 Nm under 100 K conditions, 9.0 Nm maximum torque, 4300 rpm maximum speed, and 3.9 kg motor mass without holding brake. Because this exact model uses the UP0 configuration, the practical motor weight should be treated as approximately 3.9 kg rather than the higher brake-equipped value.

Basic Product Information

Key Technical Specifications

The above values are based on the MSK050B-0300-NN technical data in Rexroth IndraDyn S project-planning documentation. The same table also shows 5.0 kg as the brake-equipped mass, but this specific model has the UP0 code, meaning it should be handled as the no-brake version with an approximate 3.9 kg motor body weight.

Detailed Product Description

The REXROTH R911317163 MSK050B-0300-NN-M2-UP0-RNNN is built for compact automation axes where precise rotary motion is more important than oversized torque capacity. It can be used in machines that require fast acceleration, repeatable positioning, controlled deceleration, and smooth speed response. Typical applications include small CNC axes, electronic assembly equipment, packaging mechanisms, labeling systems, testing machines, feeder units, printing equipment, and compact handling devices.

The MSK050B frame size makes this motor easier to integrate into machines with limited installation space. Its approximate 3.9 kg body weight reduces mechanical load on mounting plates and machine frames compared with larger servo motors. This is useful for compact machines where axis mass, mounting rigidity, and cabinet-to-machine layout all affect final system performance.

The 0300 winding provides a balanced speed and torque profile for general industrial servo applications. The maximum speed of approximately 4300 rpm allows the motor to support relatively fast machine cycles, while the 9.0 Nm maximum torque provides short-term overload capability during acceleration or transient load changes. The continuous standstill torque values of 3.0 Nm at 60 K and 3.4 Nm at 100 K are suitable for moderate-load positioning axes, indexing mechanisms, and servo-driven auxiliary functions.

The NN cooling code indicates natural convection cooling. This means the motor is designed to dissipate heat through its housing without a separate fan or liquid cooling circuit. Natural convection is practical for compact machines because it reduces additional components, wiring, and maintenance points. However, correct installation remains important. The motor should not be fully enclosed without considering heat dissipation, and it should be operated within the specified ambient temperature range.

The M2 feedback configuration is important for servo control performance. In a closed-loop servo system, feedback allows the drive to monitor actual motor position and speed. This helps the controller correct motion errors, maintain stable positioning, and execute repeatable machine cycles. For replacement work, the encoder configuration must match the original drive parameters and machine control requirements. A similar MSK050B motor with a different encoder code may not be a direct replacement without drive configuration changes.

The UP0 section of the model code is also relevant for mechanical compatibility. This version is commonly associated with a keyed shaft and shaft sealing arrangement, while the 0 indicates no holding brake. A keyed shaft is useful when the driven load requires positive mechanical torque transmission. The shaft sealing ring helps improve resistance against light contamination at the shaft side, which is important in production environments where dust, oil mist, or process particles may be present.

Because this model does not include a holding brake, it is best suited for axes where load holding after power-off is not required, or where the machine already uses an external holding mechanism. For vertical axes, suspended loads, or gravity-loaded systems, the absence of a holding brake must be evaluated carefully. In those cases, an external brake, counterbalance, safety mechanism, or a brake-equipped motor variant may be required.

Application Areas

Weight and Handling Notes

The 3.9 kg motor weight is useful for machine design, installation planning, and shipping estimation. However, logistics weight should not be calculated from motor mass alone. Export packaging, protective foam, carton material, wooden case, and additional accessories can increase the gross weight. For international freight, both gross weight and volume weight should be checked before quotation.

Procurement and Replacement Guidance

For replacement, users should not rely only on the partial code MSK050B-0300. The complete model MSK050B-0300-NN-M2-UP0-RNNN should be checked because similar motors may have different encoder systems, shaft configurations, holding brake options, or design variants. A physically similar motor may still create commissioning problems if the feedback or brake configuration is different.

SEO-Oriented Product Summary

The REXROTH R911317163 MSK050B-0300-NN-M2-UP0-RNNN synchronous servo motor is a compact IndraDyn S MSK series motor for industrial automation, packaging machinery, CNC equipment, printing systems, labeling machines, and precision motion control applications. It features 3.0 Nm continuous standstill torque at 60 K, 3.4 Nm continuous standstill torque at 100 K, 9.0 Nm maximum torque, 4300 rpm maximum speed, M2 multiturn encoder feedback, natural convection cooling, keyed shaft configuration, no holding brake, and an approximate 4.0 kg motor weight.

For procurement, repair, or spare-parts supply, the safest product description is: REXROTH R911317163 MSK050B-0300-NN-M2-UP0-RNNN IndraDyn S Synchronous Servo Motor. This complete description helps reduce the risk of ordering a similar but incompatible MSK050B variant.