The Rexroth R911306051 MSK060B-0600-NN-M1-UG1-NNNN is a compact and highly capable synchronous servo motor from the IndraDyn S MSK series, developed for demanding industrial motion-control applications that require stable torque delivery, accurate feedback, high dynamic response, and dependable long-term operation. This model combines a compact housing size with a strong performance profile, making it suitable for machines where installation space is limited but positioning accuracy and repeatability cannot be compromised. Publicly available product information identifies this motor as an IndraDyn S servo unit with natural convection cooling, an optical multiturn absolute encoder with Hiperface interface, a plain shaft with shaft sealing ring, and a 10 Nm electrically released holding brake.
From a performance perspective, the MSK060B-0600 winding version is designed for applications that benefit from a maximum speed of 6000 rpm, maximum torque of 15 Nm, and continuous standstill torque of 5.0 Nm at 60 K or 5.5 Nm at 100 K. The technical data also shows IP65 protection, insulation class 155, and a motor weight of 5.7 kg for the base version, with the bracketed value in the technical table indicating 6.5 kg for versions equipped with a holding brake. Because the exact model code in this request is a UG1 brake version, the practical net motor weight is best stated as approximately 6.5 kg.
Key Product Data
The verified key data for this configuration are summarized below.
| Item | Description |
|---|---|
| Brand | Rexroth |
| Order Number | R911306051 |
| Model | MSK060B-0600-NN-M1-UG1-NNNN |
| Product Family | IndraDyn S MSK |
| Motor Type | Synchronous servo motor |
| Cooling Method | Natural convection |
| Encoder Type | Optical multiturn absolute encoder, Hiperface |
| Shaft Version | Plain shaft with shaft sealing ring |
| Holding Brake | 10 Nm, electrically released |
| Continuous Torque at Standstill 60 K | 5.0 Nm |
| Continuous Torque at Standstill 100 K | 5.5 Nm |
| Maximum Torque | 15.0 Nm |
| Maximum Speed | 6000 rpm |
| Protection Class | IP65 |
| Insulation Class | 155 |
| Net Weight | 6.5 kg with holding brake |
| Base Motor Weight Reference | 5.7 kg without brake |
Mechanical and Electrical Design
One of the strongest advantages of the Rexroth MSK060B servo motor platform is its balance between compact dimensions and industrial robustness. The MSK series was developed to cover a wide power spectrum with finely graduated sizes, and the MSK060B sits in a useful middle range for machinery builders who need strong servo performance without moving to a larger and heavier frame. The IP65 protection level supports installation in real factory conditions where dust, splash exposure, and routine maintenance conditions are part of daily operation. In addition, the shaft sealing ring contributes to more reliable shaft-end protection in practical machine environments.
The motor also benefits from a configuration that supports easier system integration. Public model-specific sources describe the electrical connection as a rotatable connector, which can be valuable when cable routing space is tight or when the motor is installed in compact machine assemblies with restricted cabinet and mechanical clearances. The optical absolute feedback arrangement is another important feature because it helps improve axis positioning, startup behavior, and control consistency in servo systems that require precise command execution and reliable status information during automated cycles.
Motion Performance and Control Value
In actual motion-control use, the 6000 rpm speed class gives this motor a flexible operating range for packaging equipment, light converting machinery, compact handling systems, labeling equipment, indexing stations, and servo-driven auxiliary axes in larger automation lines. The 15 Nm peak torque allows the motor to handle acceleration events, dynamic load changes, and intermittent demand peaks, while the continuous torque values make it practical for stable cyclical operation under normal thermal conditions. These specifications position the motor well for users who need responsive servo behavior rather than only brute-force output.
The encoder and brake combination also improves the real engineering value of this model. The multiturn absolute encoder helps maintain positional awareness and supports more advanced servo-control behavior compared with simpler feedback arrangements. Meanwhile, the 10 Nm holding brake is useful where vertical axes, suspended loads, or safety-oriented holding requirements are involved. In many machine designs, the brake is not intended to provide dynamic stopping during normal motion, but it is highly valuable for secure holding and controlled shutdown conditions. That makes the MSK060B-0600-NN-M1-UG1-NNNN especially attractive for axes that must maintain position when the drive is disabled or power is removed.
Why the Weight Matters
For many buyers, the product weight is not only a shipping detail but also an installation parameter. A motor weight of approximately 6.5 kg means the unit remains manageable for machine assembly, retrofit work, and field replacement, while still offering industrial-grade servo output. This weight level is practical for compact axis structures and mid-size machine designs where every kilogram affects bracket design, servo mounting, cable routing, and service accessibility. If a project is calculating transport cost, packaging weight still needs to be checked with the seller, but for engineering reference the configured motor itself should be treated as about 6.5 kg.
Typical Applications
The Rexroth R911306051 servo motor is well suited to applications where machine builders need a controlled combination of speed, positioning quality, and compact mechanical integration. Typical use cases include CNC support axes, pick-and-place units, packaging machines, printing and converting systems, assembly machines, textile automation, and general-purpose industrial equipment that relies on a Rexroth servo architecture. Because the unit belongs to the IndraDyn S family, it is especially relevant in motion systems already designed around Rexroth drive and control technology.
It is also a good candidate for service stock and retrofit situations. In industrial maintenance practice, exact order numbers and full model codes matter because shaft style, brake option, encoder type, and connection design can all affect interchangeability. Using the full identifier R911306051 / MSK060B-0600-NN-M1-UG1-NNNN helps reduce ordering mistakes and makes it easier to match the motor to existing drive systems, feedback requirements, and mechanical mounting expectations.
Product Advantages for Buyers
The commercial value of this Rexroth motor is not just in its nameplate specifications. It also comes from the combination of a globally recognized motion-control platform, a well-documented technical family, and a configuration that fits many practical industrial requirements. Buyers looking for a replacement motor often need four things at the same time: correct feedback type, correct brake option, correct mechanical shaft style, and dependable environmental protection. This model brings those elements together in one compact package.
Another advantage is lifecycle relevance. The MSK family is widely referenced in industrial spare-parts channels, technical documentation, and service markets, which means users can usually identify compatible documentation and support paths more easily than with obscure or low-volume servo products. For procurement teams, that improves traceability. For maintenance engineers, it reduces uncertainty during replacement planning. For machine rebuilders, it supports more predictable integration work.
Conclusion
The Rexroth R911306051 MSK060B-0600-NN-M1-UG1-NNNN is a compact, high-response synchronous servo motor built for industrial automation systems that demand precision, reliability, and solid integration features. With natural convection cooling, an optical multiturn absolute encoder, IP65 protection, a 10 Nm holding brake, 6000 rpm maximum speed, and 15 Nm peak torque, it offers a strong balance between control quality and practical machine usability. For specification and installation reference, the most appropriate weight statement for this exact brake-equipped version is approximately 6.5 kg.
If you are sourcing this motor for replacement, resale, or machine integration, it is best to keep both identifiers together in the product title and description: Rexroth R911306051 MSK060B-0600-NN-M1-UG1-NNNN. Doing so improves model recognition, reduces ordering risk, and helps technical buyers quickly confirm that the brake, encoder, shaft design, and performance class match their actual application requirements.
