The Rexroth R911306375 MSK060B-0600-NN-M1-UP1-NNNN is a compact synchronous servo motor from the IndraDyn S MSK family, developed for industrial automation systems that require accurate motion control, stable multiturn feedback, and a brake-equipped mechanical package in a relatively small frame size. Distributor listings identify this exact order number as the full type code MSK060B-0600-NN-M1-UP1-NNNN and classify it as an IndraDyn S synchronous servo motor rather than a generic replacement motor.
What makes this model commercially important is the fact that the full Rexroth code defines the real product configuration. In servo systems, frame size alone is not enough for correct selection. The encoder type, connector arrangement, shaft execution, brake option, and winding all influence interchangeability, commissioning, and machine compatibility. For that reason, industrial buyers usually search for the full designation R911306375 MSK060B-0600-NN-M1-UP1-NNNN when they are sourcing a spare part or validating a machine-build specification.
Product Summary
| Item | Description |
|---|---|
| Brand | Rexroth |
| Order Number | R911306375 |
| Full Model | MSK060B-0600-NN-M1-UP1-NNNN |
| Product Family | IndraDyn S MSK |
| Product Type | Synchronous servo motor |
| Frame Size | 060 |
| Motor Length | B |
| Winding Code | 0600 |
| Cooling Method | Natural convection |
| Encoder Type | Optical multiturn Hiperface, 128 signal periods |
| Electrical Connection | Rotatable connector, 240° |
| Shaft Version | Shaft with keyway and shaft sealing ring |
| Holding Brake | Holding brake 1 |
| Holding Brake Torque | 10 Nm |
| Brake Supply | 24 V DC, electrically released |
| Net Weight | 6.5 kg |
| Protection Class | IP65 |
| Insulation Class | 155 |
| Maximum Speed | 6000 rpm |
| Maximum Torque | 15 Nm |
The specification summary above is based on three source layers: the exact product-page mapping of R911306375 to MSK060B-0600-NN-M1-UP1-NNNN, the MSK060B technical-data sheet for the 0600 winding, and the Rexroth type-code documentation that defines M1, U, P, and brake option 1. The technical sheet gives a base weight of 5.7 kg and a bracketed value of 6.5 kg for motors with holding brake; because this exact model ends in UP1, the correct working product weight is approximately 6.5 kg.
Type Code Interpretation
| Code Section | Meaning |
|---|---|
| MSK | IndraDyn S synchronous servo motor series |
| 060 | Frame size 060 |
| B | Motor length B |
| 0600 | Winding code 0600 |
| NN | Natural convection cooling |
| M1 | Optical multiturn Hiperface encoder, 128 signal periods |
| U | Rotatable connector, 240° |
| P | Shaft with keyway and shaft sealing ring |
| 1 | Holding brake 1 |
| NNNN | Standard version |
This decoding is critical because each segment changes the practical identity of the motor. Rexroth documentation explicitly defines M1 as an optical multiturn Hiperface encoder with 128 signal periods. The same documentation identifies U as a 240-degree rotatable connector, P as a shaft with keyway and shaft sealing ring, and brake options 1, 2, or 3 as electrically released holding brakes. For the MSK060 platform, an additional Rexroth type-code source states that holding brake 1 corresponds to a 10 Nm brake option.
From a buyer’s perspective, that means this motor should not be treated as a generic MSK060B variant. A different encoder could affect feedback compatibility. A different shaft style could change coupling fit. A different brake option could alter both the mass and the mechanical behavior at standstill. In other words, the exact code is the real product, not just a long part-number label.
Core Technical Data
| Parameter | Value |
|---|---|
| Continuous torque at standstill, 60 K | 5.0 Nm |
| Continuous current at standstill, 60 K | 6.1 A |
| Continuous torque at standstill, 100 K | 5.5 Nm |
| Continuous current at standstill, 100 K | 6.7 A |
| Maximum torque | 15.0 Nm |
| Maximum current | 24.4 A |
| Torque constant at 20 °C | 0.90 Nm/A |
| Voltage constant at 20 °C | 55.2 V/1000 rpm |
| Winding resistance at 20 °C | 1.85 ohm |
| Winding inductivity | 18.000 mH |
| Number of pole pairs | 4 |
| Rotor inertia without brake | 0.00048 kg·m² |
| Thermal time constant | 16.0 min |
| Maximum speed | 6000 rpm |
| Sound pressure level | <75 dB(A) |
| Ambient operating temperature | 0 to 40 °C |
| Protection Class | IP65 |
| Insulation Class | 155 |
These values come from the Rexroth MSK060B technical-data sheet for the MSK060B-0600-NN winding variant. The same data set is consistent with reseller descriptions of the exact model, which list a maximum speed of 6000 rpm, a maximum torque of 15 Nm, and a standstill torque of 5 Nm. This puts the motor in a compact but high-speed servo category rather than in a heavy-frame torque motor class.
Configuration Value in Real Machine Design
The practical value of the R911306375 version is not only its basic torque-speed profile, but the way its options support real machine integration. The M1 encoder gives the motor multiturn Hiperface feedback, which is more capable than a simple single-turn feedback arrangement in applications where position continuity across multiple revolutions is useful. The U connector option improves cable-routing flexibility because the plug can be rotated through 239 degrees, which is often important in compact machine layouts or retrofit situations with limited installation space.
The P shaft execution is equally relevant. A shaft with keyway and shaft sealing ring is often preferred where the driven element uses a keyed coupling, pulley, or gear-side interface and where shaft sealing matters for operating cleanliness and service life. This makes the UP1 configuration more mechanically defined than a smooth-shaft alternative. In a real procurement scenario, this is exactly the kind of detail that prevents a wrong replacement from being ordered.
The holding brake is another material advantage. Rexroth documentation describes the optional motor holding brake as electrically released and powered at 25 V DC, and the MSK060 type-code reference identifies holding brake 1 as a 10 Nm option. That does not turn the motor into a large vertical-axis brake motor, but it does make it more suitable than a no-brake version for applications where axis holding at standstill is needed after power removal or during controlled stop conditions.
Weight, Handling, and Installation Relevance
For industrial users, product weight is not a decorative catalog field. It affects shipping estimates, mounting design, replacement handling, and maintenance planning. The official MSK060B technical sheet lists 5.7 kg as the standard mass and 6.5 kg in brackets for the brake-equipped version. Since the exact model code is UP1, the correct product-description weight is approximately 6.5 kg. Using the lower 5.7 kg value would describe the non-brake platform rather than the actual brake-equipped motor.
That weight level is also useful from a machine-design perspective. At roughly 6.4 kg, the motor remains compact and manageable for service work, but it still delivers a substantial performance envelope for a frame-060 servo. This balance is one reason the MSK060 family is attractive in automation equipment where space is limited but closed-loop control quality cannot be compromised. A compact motor with multiturn feedback, keyed shaft, and brake can be easier to integrate than a physically larger platform, especially in retrofits or densely packed machinery.
Typical Industrial Applications
| Application Area | Why This Model Fits |
|---|---|
| Packaging equipment | Compact size, high speed, and accurate servo control |
| Indexing and transfer axes | Good peak torque relative to frame size |
| Assembly automation | Brake option helps controlled standstill behavior |
| Compact handling systems | Multiturn feedback supports better position continuity |
| Retrofit projects | Rotatable connector and keyed shaft reduce integration risk |
| Precision machine modules | IP65 housing and defined shaft execution support industrial use |
These application areas match the model’s actual configuration. The 6000 rpm maximum speed supports fast-cycle motion, while the 15 Nm maximum torque provides useful overload reserve for acceleration and short dynamic events. The IP65 protection class and insulation class 155 also indicate that the motor is intended for normal industrial duty rather than for protected laboratory use only.
Search and Procurement Relevance
From a search-engine and industrial-publishing perspective, this motor is best presented with its exact order number, full type code, technical tables, and configuration explanation. Buyers usually search by strings such as “R911306375,” “MSK060B-0600-NN-M1-UP1-NNNN,” or “Rexroth MSK060B servo motor with brake.” A product page that clearly states the encoder type, shaft style, brake option, speed, torque, and weight is more useful to both industrial customers and search indexing than a thin page based on repeated generic keywords.
Conclusion
The Rexroth R911306375 MSK060B-0600-NN-M1-UP1-NNNN is a compact IndraDyn S synchronous servo motor configured for industrial applications that need a high-speed servo platform with multiturn Hiperface feedback, a keyed shaft, and an integrated holding brake. Official MSK060B-0600-NN technical data show 5.0 Nm continuous standstill torque at 60 K, 5.5 Nm at 100 K, 15.0 Nm maximum torque, 25 A maximum current, and 6000 rpm maximum speed. The exact M1-UP1 configuration adds an optical multiturn Hiperface encoder, a 239-degree rotatable connector, a shaft with keyway and shaft sealing ring, and holding brake 1 with 10 Nm torque at 25 V DC. Based on the official brake-corrected mass values, the appropriate product weight for this version is approximately 6.5 kg. For OEM integration, machine retrofit, and spare-parts sourcing, this is a technically clear and commercially credible Rexroth servo motor reference.
