The Rexroth R911312332 MSK100B-0200-NN-S1-BG0-NNNN is a synchronous servo motor from the IndraDyn S MSK series, developed for industrial automation systems that require controlled torque output, accurate motion feedback, and stable long-term operation. The exact order number R911312332 corresponds to the full motor designation MSK100B-0200-NN-S1-BG0-NNNN, which is listed by industrial suppliers as an MSK100B servo motor with natural convection cooling, an optical single-turn Hiperface encoder, a B-side electrical connection, a plain shaft with shaft sealing ring, and no holding brake. This is not a general-purpose motor. It is a precision servo drive component intended for machine builders, retrofit engineers, and maintenance teams that need reliable axis performance in production environments.
Product Identification
The table below summarizes the main identity data for this exact Rexroth motor model. The configuration details are based on exact-model distributor listings and Rexroth MSK100B platform references.
| Item | Description |
|---|---|
| Brand | Rexroth |
| Order Number | R911312332 |
| Full Model | MSK100B-0200-NN-S1-BG0-NNNN |
| Product Family | IndraDyn S MSK |
| Product Type | Synchronous servo motor |
| Motor Size | 100 |
| Motor Length | B |
| Winding Code | 0200 |
| Cooling Method | Natural convection |
| Encoder Type | Optical single-turn Hiperface, 128 signal periods |
| Electrical Connection | B-side connector |
| Shaft Version | Plain shaft with shaft sealing ring |
| Holding Brake | No |
| Net Weight | 75 lb, about 35.0 kg |
| Protection Class | IP65 |
| Insulation Class | F |
From a product-selection standpoint, the full designation matters because servo motors are configured devices, not generic catalog items. On this model, the exact code defines the winding, cooling method, feedback system, connector position, shaft style, and brake status. That is why industrial buyers usually search by the complete number R911312332 MSK100B-0200-NN-S1-BG0-NNNN rather than by “MSK100 motor” alone.
Model Structure and Configuration Meaning
The code structure below explains why this motor should be identified and ordered by its full type designation rather than by frame size only. The meanings listed here are grounded in the exact model descriptions available for this configuration.
| Code Section | Meaning |
|---|---|
| MSK | IndraDyn S synchronous servo motor family |
| 100 | Motor frame size 100 |
| B | Motor length B |
| 0200 | Winding code 0200 |
| NN | Natural convection cooling |
| S1 | Optical single-turn Hiperface encoder |
| B | Connector on B-side |
| G | Plain shaft with shaft sealing ring |
| 0 | Without holding brake |
| NNNN | Standard version |
This configuration gives the motor a very specific commercial identity. The no-brake version is usually preferred where the axis does not need electrical holding at standstill, such as many horizontal movement axes, conveyor drives, transfer systems, and machine modules with other mechanical retention methods. The single-turn Hiperface encoder supports accurate feedback for speed and position control, while the B-side connector matters in real machine design because cable routing and installation space are often fixed by the equipment layout.
Technical Performance Data
The technical values below come from the Rexroth MSK100B-0200-NN technical-data platform. These figures define the motor’s real performance envelope and show that it belongs to a serious industrial servo class rather than to a light-duty positioning category.
| Parameter | Value |
|---|---|
| Continuous torque at standstill, 60 K | 28.0 Nm |
| Continuous current at standstill, 60 K | 14.7 A |
| Continuous torque at standstill, 100 K | 33.0 Nm |
| Continuous current at standstill, 100 K | 17.3 A |
| Continuous torque at standstill, surface cooled | 42.0 Nm |
| Continuous current at standstill, surface cooled | 22.1 A |
| Maximum torque | 102.0 Nm |
| Maximum current | 66.2 A |
| Torque constant at 20°C | 2.10 Nm/A |
| Voltage constant at 20°C | 129.5 V/min⁻¹ |
| Winding resistance at 20°C | 0.58 Ohm |
| Winding inductivity | 7.600 mH |
| Number of pole pairs | 4 |
| Rotor inertia without brake | 0.01920 kg·m² |
| Thermal time constant | 40.0 min |
| Maximum speed | 4100 min⁻¹ |
| Sound pressure level | <75 dB[A] |
| Ambient operating temperature | 0 to 40°C |
| Degree of protection | IP65 |
| Insulation class | F |
From an engineering perspective, the balance of 28.0 Nm continuous standstill torque, 102.0 Nm maximum torque, and 4100 rpm maximum speed makes this motor suitable for dynamic but controlled machine movement. It is not oversized for every application, but it is large enough to serve real production machinery with repeated acceleration, deceleration, torque changes, and precise motion requirements. The rotor inertia figure also indicates a motor intended for stable servo behavior in systems that must manage load changes without sacrificing control quality.
Weight and Installation Relevance
For industrial procurement, weight is not just a packaging detail. It affects freight calculations, bracket design, handling method during installation, and service planning during field replacement. A distributor listing for R911312332 gives an approximate weight of 75 lb, which converts to about 34.0 kg. That weight is consistent with this being a no-brake MSK100B variant, because the Rexroth technical table explicitly states that the listed inertia figure is specified without brake, and the exact product configuration is BG0, meaning no holding brake.
In practical use, a motor in the 35 kg range sits in a valuable middle zone for industrial servo systems. It is clearly more substantial than a compact servo motor, yet it remains manageable for standard machine construction, replacement work, and transport planning. For OEM builders, that makes it easier to balance torque requirements with machine-frame constraints. For maintenance teams, it reduces uncertainty when arranging lifting, packing, and on-site changeout procedures.
Why This Model Works in Real Automation Systems
The Rexroth R911312332 MSK100B-0200-NN-S1-BG0-NNNN is best understood as a precision motion component for medium-to-heavy servo duty. It combines enough continuous torque for sustained load handling with enough peak torque reserve for dynamic events such as rapid indexing, acceleration under process load, or compensation for transient resistance in machine movement. Because it uses natural convection cooling, the motor also fits systems where a simpler cooling concept is preferred over more complex forced-cooling arrangements.
The single-turn Hiperface encoder is another important reason this motor remains commercially useful. In many industrial axes, users need accurate closed-loop speed and position feedback, but they do not necessarily need a more complex multiturn encoder arrangement. In those cases, the S1 configuration offers a practical and stable solution, especially for packaging equipment, printing systems, robotics-related movement, and transfer axes where repeatability and servo control matter more than extra configuration complexity. Supplier descriptions of this exact model specifically reference applications such as packaging, robotics, and printing systems, which aligns with the motor’s published torque and speed profile.
Typical Application Areas
The application examples below are consistent with the motor’s published configuration and performance level.
| Application Area | Why the Motor Fits |
|---|---|
| Packaging machinery | High peak torque and repeatable axis control |
| Transfer and conveyor systems | Good for controlled starts, stops, and positioning |
| Printing and converting equipment | Stable servo response and accurate feedback |
| Handling modules | Useful torque reserve for repeated cyclic motion |
| Robotics-related axes | Suitable where speed control and positional accuracy are required |
| Retrofit and spare-parts replacement | Exact code helps prevent configuration mismatch |
For buyers, the strongest commercial advantage of this motor is clarity. The exact part number tells the user what the motor is, how it is configured, and how it should be matched. That matters because servo replacement errors are expensive. A wrong encoder type, a different connector orientation, or an unexpected holding brake can turn a supposedly equivalent part into an installation failure. Using the full designation R911312332 MSK100B-0200-NN-S1-BG0-NNNN in a product page improves both procurement accuracy and search visibility because it answers the real industrial question: “Is this the exact motor I need?”
SEO and Search Visibility Value
From an indexing and technical-content standpoint, this model is well suited to search-oriented product publishing. Industrial buyers rarely search broad terms only. More often, they search exact phrases such as “R911312332,” “MSK100B-0200-NN-S1-BG0-NNNN,” “Rexroth MSK100B servo motor,” or “MSK100B 102 Nm servo motor.” A product page that includes the exact order number, a readable specification table, a weight statement, and a useful explanation of configuration differences is more valuable than a thin page based on repeated keywords. Because this motor has a precise and fully searchable designation, it supports strong technical SEO when the content remains specific, structured, and accurate.
Conclusion
The Rexroth R911312332 MSK100B-0200-NN-S1-BG0-NNNN is a clearly defined IndraDyn S synchronous servo motor designed for industrial motion systems that need accurate feedback, dependable torque output, and predictable integration. Its exact configuration combines natural convection cooling, an optical single-turn Hiperface encoder, a B-side connector, a plain shaft with shaft sealing ring, and no holding brake. The Rexroth MSK100B-0200 technical platform gives it 28.0 Nm continuous standstill torque at 60 K, 33.0 Nm at 100 K, 102.0 Nm maximum torque, and a maximum speed of 4100 rpm, while distributor data place the motor weight at about 75 lb, or approximately 35.0 kg. For OEM machine building, industrial repair, and precise spare-parts replacement, this motor is a technically credible and commercially practical Rexroth servo reference.
