The Rexroth R911319511 MSK061C-0300-NN-M1-UP1-NNNN is a synchronous servo motor from the Rexroth IndraDyn S MSK series, designed for demanding motion-control applications that require precision, repeatability, and reliable long-term operation. This exact configuration belongs to the MSK061 frame size with C motor length and 0300 winding, and it combines natural convection cooling with a multiturn absolute encoder, a rotatable plug connection, a keyed shaft, and an electrically released holding brake. In practical terms, this is a compact but industrial-duty servo motor intended for machine builders and maintenance teams that need a balance of torque density, installation flexibility, and accurate feedback for controlled axis motion.
Product Identification
| Item | Description |
|---|---|
| Brand | Rexroth |
| Order Number | R911319511 |
| Full Model | MSK061C-0300-NN-M1-UP1-NNNN |
| Product Family | IndraDyn S MSK |
| Product Type | Synchronous servo motor |
| Motor Size | MSK061 |
| Motor Length | C |
| Winding Code | 0300 |
| Cooling Mode | Natural convection |
| Encoder | Optical encoder, multiturn absolute Hiperface, 128 increments |
| Electrical Connection | Plug, rotatable 240° |
| Shaft Version | Shaft with keyway and shaft sealing ring |
| Holding Brake | Electrically released, 10 Nm |
| Other Design | NNNN |
| Protection Class | IP65 |
| Insulation Class | 155 |
| Net Weight | 8.8 kg |
The configuration above is not guesswork. Rexroth’s MSK061 type-code pages show that “M1” means an optical multiturn-absolute Hiperface encoder with 128 increments, “U” means a rotatable plug electrical connection, “P” denotes a keyed shaft with shaft sealing ring, and “1” indicates a 10 Nm electrically released holding brake. The exact nameplate image for MSK061C-0300-NN-M1-UP1-NNNN shows the full type code together with a mass marking of 8.8 kg.
Technical Data Summary
| Parameter | Value |
|---|---|
| Continuous torque at standstill, 60 K | 8.0 Nm |
| Continuous current at standstill, 60 K | 4.3 A |
| Continuous torque at standstill, 100 K | 9.0 Nm |
| Continuous current at standstill, 100 K | 4.8 A |
| Continuous torque at standstill, surface cooled | 12.0 Nm |
| Continuous current at standstill, surface cooled | 6.5 A |
| Maximum torque | 32.0 Nm |
| Maximum current | 19.4 A |
| Torque constant at 20 °C | 2.04 Nm/A |
| Voltage constant at 20 °C | 125.7 V/min⁻¹ |
| Winding resistance at 20 °C | 4.50 ohms |
| Winding inductivity | 21.400 mH |
| Number of pole pairs | 4 |
| Rotor inertia | 0.00075 kg·m² |
| Thermal time constant | 15.0 min |
| Maximum speed | 4,200 rpm |
| Sound pressure level | <75 dB[A] |
| Ambient operating temperature | 0 to 40 °C |
| Degree of protection | IP65 |
These values come from the official MSK061C technical-data table for the 0300 winding variant. The same table shows the MSK061C-0300-NN base weight as 8.3 kg, with the bracketed higher value applying to motors with holding brake. Since this exact code ends in “UP1,” and the nameplate explicitly shows 8.8 kg, the correct working weight for R911319511 is 8.8 kg rather than the non-brake base mass.
Model Code Breakdown
| Code Section | Meaning |
|---|---|
| MSK | Rexroth IndraDyn S synchronous motor series |
| 061 | Motor size 061 |
| C | Motor length C |
| 0300 | Winding code 0300 |
| NN | Natural convection cooling |
| M1 | Multiturn-absolute Hiperface encoder |
| U | Rotatable plug connection |
| P | Keyed shaft with shaft sealing ring |
| 1 | Holding brake, electrically released, 10 Nm |
| NNNN | Standard design / no special other design |
One advantage of presenting the product this way is that it helps buyers understand the exact configuration rather than treating the motor as a generic MSK061 unit. In servo systems, small code differences matter. An incorrect encoder type, a missing brake, or the wrong shaft form can turn a supposed replacement into a commissioning problem. For procurement, maintenance, and spare-parts sourcing, the full code R911319511 MSK061C-0300-NN-M1-UP1-NNNN is the key identifier that should be retained in quotations, product pages, and technical records.
Design and Motion-Control Characteristics
This servo motor is built for applications where positioning quality and controlled dynamic response are more important than simple constant-speed rotation. The MSK061C platform provides 8.0 Nm continuous standstill torque at 60 K and 32.0 Nm maximum torque, which means the motor can support repeated acceleration, intermittent peak loading, and controlled start-stop cycles without being oversized for compact machines. A maximum speed of 4,200 rpm further makes the motor suitable for equipment that needs a mix of torque at low speed and responsive motion at higher operating speeds.
The M1 encoder version is particularly important in automation systems where feedback quality influences actual machine performance. Rexroth defines M1 on this size as a multiturn-absolute Hiperface encoder with 128 increments. That matters because a multiturn absolute feedback system can preserve position information across multiple revolutions, reducing reference-point dependency and helping support more stable commissioning and restart behavior in many axis designs. For OEM machine builders, that can translate into easier integration, cleaner motion control, and lower risk of configuration mismatch during replacement.
The UP1 part of the code also adds meaningful practical value. The “P” shaft option means a keyed shaft with shaft sealing ring, which is a common preference in industrial machinery where secure torque transmission and predictable mechanical coupling are required. The “1” means an electrically released 10 Nm holding brake, which makes this version more suitable than a non-brake motor for axes where load retention at standstill or after power removal is relevant. That does not automatically make it a vertical-axis specialist, but it does expand the range of machine designs in which this motor can be used safely and effectively.
Weight, Installation, and Service Considerations
Weight is not just a catalog number. In real projects it affects mounting design, shipping estimates, replacement handling, and installation safety. The official MSK061C technical table shows 8.3 kg for the non-brake version and 8.8 kg for the brake-equipped version in the corresponding weight notation. The exact nameplate image of MSK061C-0300-NN-M1-UP1-NNNN confirms the motor mass as 8.8 kg, which is the figure that should be used for this exact order number in product listings, freight planning, and service preparation.
For machine builders, the 8.8 kg weight is still moderate enough to fit many compact industrial installations while offering substantially more torque capability than smaller servo frames. For service teams, that weight is useful when preparing for on-site replacement because it affects lifting method, bracket inspection, and packing requirements. For sellers and distributors, using the exact weight also improves technical credibility, since industrial customers often compare product pages against physical nameplates and official manuals.
Typical Application Areas
| Application | Why This Motor Fits |
|---|---|
| Packaging machinery | Good dynamic response, accurate axis positioning, brake-equipped configuration |
| Handling systems | Useful torque reserve and reliable multiturn encoder feedback |
| Assembly machines | Stable servo control for repetitive and synchronized motion |
| Conveyor and transfer axes | Controlled acceleration, deceleration, and stop-position behavior |
| Indexing tables | High peak torque relative to frame size |
| General industrial automation | Compact servo package with standard Rexroth integration logic |
This motor is best understood as a precision motion component for serious industrial use, not as a general-purpose motor. Its technical profile points to applications where axis control, repeatability, and integration quality matter. The torque figures, encoder configuration, keyed shaft, and brake option all indicate a design aimed at controlled servo duty in automated machinery rather than simple rotation-only service. In that sense, the MSK061C-0300-NN-M1-UP1-NNNN is attractive both as an OEM installation motor and as an exact replacement part in existing Rexroth-based systems.
SEO and Product-Page Relevance
For search-oriented industrial content, this product has a clear advantage: the exact order number and full model code are both highly specific and commercially searchable. Buyers commonly search for terms such as “Rexroth R911319511,” “MSK061C-0300-NN-M1-UP1-NNNN,” “Rexroth IndraDyn S servo motor,” “MSK061C 8.8 kg,” or “32 Nm Rexroth servo motor.” A strong product page should therefore combine exact identification, readable technical tables, configuration decoding, and application-oriented explanation. That approach aligns better with technical search intent than thin content or keyword repetition, and it improves the usefulness of the page for both search engines and real industrial buyers.
Conclusion
The Rexroth R911319511 MSK061C-0300-NN-M1-UP1-NNNN is a brake-equipped IndraDyn S synchronous servo motor built for precision automation tasks that demand accurate feedback, controlled torque delivery, and dependable integration. Its exact configuration includes natural convection cooling, a multiturn-absolute Hiperface encoder, a rotatable plug connection, a keyed shaft with sealing ring, and a 10 Nm holding brake. According to Rexroth MSK061C technical data and the exact product nameplate, the motor delivers 8.0 Nm continuous standstill torque at 60 K, 32.0 Nm maximum torque, 4,200 rpm maximum speed, IP65 protection, and an actual listed weight of 8.8 kg for this brake-equipped version. For OEM builds, machine retrofit, and spare-parts sourcing, this is a technically solid and commercially clear Rexroth servo motor reference.
