The REXROTH R911311889 MSK100B-0200-NN-M1-BG1-NNNN is a high-torque synchronous servo motor from the Rexroth IndraDyn S MSK series. It is designed for industrial automation systems that require controlled rotary motion, stable torque output, accurate feedback, and reliable operation under demanding production conditions. This motor is commonly used in packaging machinery, printing equipment, material handling systems, forming machines, converting lines, automated production cells, and servo-driven machine axes where compact structure and strong torque density are both important.
For correct identification, the product should be listed with both its order number R911311889 and its full motor type code MSK100B-0200-NN-M1-BG1-NNNN. Public supplier listings identify R911311889 as the Rexroth MSK100B-0200-NN-M1-BG1-NNNN synchronous servo motor, so these two identifiers should be kept together for quotation, replacement, inventory matching, and technical confirmation.
Product Overview
| Item | Description |
|---|---|
| Brand | REXROTH |
| Order Number | R911311889 |
| Full Model | MSK100B-0200-NN-M1-BG1-NNNN |
| Product Type | Synchronous Servo Motor |
| Product Family | IndraDyn S MSK Series |
| Motor Size | MSK100 |
| Motor Length | B |
| Winding Code | 0200 |
| Cooling Method | Natural Convection |
| Encoder Type | M1 Multiturn Absolute Encoder |
| Electrical Connection Position | B-Side Connector |
| Shaft Version | Plain Shaft With Shaft Sealing Ring |
| Holding Brake | Yes, Electrically Released Holding Brake |
| Design Version | Standard NNNN |
| Protection Rating | IP65 |
| Insulation Class | F |
| Motor Net Weight | About 36.4 kg With 32 Nm Brake |
| Typical Use | Servo Axis Drive For Industrial Automation Equipment |
The MSK100B frame is a larger MSK servo motor size compared with compact MSK040, MSK050, or MSK060 variants. It is selected when the driven axis requires higher torque capability while still using a servo motor package suitable for precise motion control. The 0200 winding indicates a lower-speed, higher-torque configuration within the MSK100B range. This makes the motor suitable for axes where continuous torque, peak torque, and load control matter more than very high shaft speed.
Technical Specification Table
| Technical Parameter | Value |
|---|---|
| Motor Type | MSK100B-0200-NN |
| 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 Cooling Reference | 42.0 Nm |
| Continuous Current At Standstill Surface Cooling Reference | 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 |
| Leakage Capacitance | 10.3 nF |
| Number Of Pole Pairs | 4 |
| Rotor Moment Of Inertia Without Brake | 0.01920 kg*m2 |
| Thermal Time Constant | 40.0 min |
| Maximum Speed | 4,100 min-1 |
| Sound Pressure Level | Less Than 75 dB[A] |
| Operating Ambient Temperature | 0 To 40 °C |
| Protection Rating | IP65 |
| Insulation Class | F |
Rexroth MSK100B-0200-NN technical data lists 28.0 Nm continuous torque at standstill at 60 K, 33.0 Nm at 100 K, 102.0 Nm maximum torque, 66.2 A maximum current, and 4,100 min-1 maximum speed for this motor size and winding. The same data table lists IP65 protection and insulation class F for the MSK100B natural-convection configuration.
Weight And Brake Configuration
The weight of this specific configuration must be handled carefully because BG1 indicates a brake-equipped version. Public MSK100B no-brake variants are commonly listed with a motor weight of 34 kg. Rexroth MSK100 holding-brake technical data lists an optional brake mass of 2.4 kg for the 32 Nm brake and 3.8 kg for the 70 Nm brake. For the G1 brake configuration, the practical motor weight should therefore be treated as approximately 36.4 kg when using the 32 Nm brake assumption, excluding export packaging, carton, wooden case, cables, and accessories.
| Weight Item | Reference Value |
|---|---|
| Base MSK100B Motor Weight Commonly Listed | 34 kg |
| Optional 32 Nm Brake Mass | 2.4 kg |
| Estimated Motor Weight With G1 Brake | About 36.4 kg |
| Export Packing Weight | Must Be Confirmed Separately |
| Recommended Shipping Check | Confirm actual nameplate and packing list before shipment |
For quotation and logistics, it is safer not to use the bare motor weight as the final shipping weight. International shipment normally includes protective packaging, shaft protection, moisture barrier, carton or wooden case, and sometimes extra accessories. For freight estimation, the gross weight may be noticeably higher than the motor mass.
Model Code Explanation
| Code Section | Meaning |
|---|---|
| MSK | Rexroth IndraDyn S Synchronous Servo Motor |
| 100 | Motor Size 100 |
| B | Motor Length B |
| 0200 | Winding Code 0200 |
| NN | Natural Convection Cooling |
| M1 | Multiturn Absolute Encoder |
| B | Power Connector Located On B Side |
| G | Plain Shaft With Shaft Sealing Ring |
| 1 | Holding Brake Version |
| NNNN | Standard Design Version |
The M1 encoder is an important feature for closed-loop servo operation. A multiturn absolute encoder allows the drive system to determine motor position across multiple revolutions. In machine applications, this reduces the need for repeated homing procedures and improves the repeatability of position-controlled axes. This is useful in indexing systems, rotary positioning units, lifting axes, material transfer systems, and production machines where restart accuracy is important.
The plain shaft with shaft sealing ring supports direct coupling to gearboxes, couplings, belt pulleys, and other mechanical drive components. The shaft sealing ring improves resistance against contamination at the shaft interface when the motor is installed correctly. The B-side connector should be checked before replacement because cable routing and connector orientation can affect installation clearance inside machine frames or motor mounting spaces.
Application Fields
| Application Field | Typical Motor Function |
|---|---|
| Packaging Machinery | Rotary sealing, indexing, cutting, filling, synchronized movement |
| Printing Equipment | Roller control, tension regulation, registration axis |
| Material Handling | Conveyor positioning, transfer axis, lifting axis |
| Plastic And Rubber Machinery | Puller control, cutting unit, auxiliary rotary axis |
| CNC And Metalworking Equipment | Feed axis, support axis, controlled rotary movement |
| Assembly Automation | Pressing, positioning, torque-controlled movement |
| Converting Lines | Web feed, winding, unwinding, and cutting |
| General Industrial Automation | High-torque servo axis for production machinery |
The R911311889 MSK100B-0200-NN-M1-BG1-NNNN is suitable for applications that need strong servo torque but do not require the larger physical size of the MSK101 or MSK133 range. Its 102.0 Nm maximum torque gives the motor a useful torque reserve for acceleration, deceleration, load changes, and intermittent peak-demand operation. This is particularly important when the motor drives a mechanical system with inertia, friction, or frequent start-stop cycles.
Engineering Selection Notes
| Selection Point | Why It Matters |
|---|---|
| Complete Model Code | Prevents incorrect replacement with a similar MSK100B variant |
| Order Number | Confirms the exact configured Rexroth item |
| Encoder Type | Must match the drive feedback interface |
| Brake Version | Affects wiring, holding function, safety logic, and weight |
| Shaft Type | Determines coupling compatibility |
| Connector Side | Affects cable routing and machine installation |
| Cooling Method | Determines thermal performance and installation limits |
| Weight | Important for mounting structure, handling, and shipping |
When replacing this motor, it is not enough to match only MSK100B-0200-NN. Other MSK100B-0200 motors may use a different encoder, connector side, shaft design, brake configuration, or special design suffix. A wrong encoder may cause drive feedback incompatibility. A wrong brake configuration may create wiring or safety issues. A wrong connector direction may prevent installation in a tight machine frame. Therefore, the full replacement reference should remain R911311889 MSK100B-0200-NN-M1-BG1-NNNN.
The holding brake should also be understood correctly. It is mainly used to hold the axis when the drive is disabled or the machine is stopped. It is not a substitute for continuous dynamic braking during normal operation. For vertical axes, suspended loads, or safety-related load holding, the full machine design must be reviewed. Brake torque, load inertia, gearbox ratio, safety factor, and emergency-stop behavior should be checked before approving the motor as a replacement.
Product Summary
The REXROTH R911311889 MSK100B-0200-NN-M1-BG1-NNNN is a high-performance IndraDyn S synchronous servo motor built for industrial motion-control applications requiring strong torque, accurate feedback, and reliable mechanical integration. It combines the MSK100B frame, 0200 winding, natural-convection cooling, M1 multiturn absolute encoder, B-side connector, plain shaft with shaft sealing ring, and brake-equipped configuration. With 33.0 Nm continuous standstill torque at 100 K, 102.0 Nm maximum torque, 4,100 min-1 maximum speed, IP65 protection, and an estimated brake-equipped motor weight of approximately 36.4 kg, this model is suitable for demanding servo axes in automated production equipment.
