The REXROTH R911312800 MSK071D-0200-NN-S1-UP1-NNNN is an industrial synchronous servo motor from the Rexroth MSK / IndraDyn S motor family. It is designed for applications that require precise motion control, reliable torque generation, compact installation, and stable performance in continuous industrial operation. This model is suitable for machine builders, maintenance teams, automation integrators, and end users who need a dependable servo motor for controlled positioning, speed regulation, and dynamic drive tasks.
The complete type code MSK071D-0200-NN-S1-UP1-NNNN identifies a motor with the MSK071D frame size, 0200 winding, natural convection cooling, singleturn optical encoder feedback, shaft with keyway, shaft sealing ring, and holding brake configuration. The order number R911312800 should be used together with the full type code when checking compatibility, replacing an existing motor, or preparing a procurement request.
According to Rexroth MSK071D technical data, the MSK071D-0200-NN version has a continuous standstill torque of 17.5 Nm at 60 K, 20.0 Nm at 100 K, maximum torque of 66.0 Nm, maximum speed of 3200 rpm, and a motor mass of 18.0 kg without holding brake or 19.6 kg with holding brake. Since this type code contains UP1, which indicates a holding brake version, the recommended product weight for this complete motor is approximately 19.6 kg.
Basic Product Data
| Item | Specification |
|---|---|
| Brand | REXROTH |
| Order Number | R911312800 |
| Full Type Code | MSK071D-0200-NN-S1-UP1-NNNN |
| Product Family | MSK / IndraDyn S |
| Product Type | Synchronous Servo Motor |
| Frame Size | MSK071D |
| Winding Code | 0200 |
| Cooling Method | Natural Convection |
| Encoder Type | Optical Singleturn Encoder |
| Shaft Version | Shaft With Keyway |
| Shaft Seal | Included |
| Brake Configuration | Holding Brake 1 |
| Product Net Weight | 19.6 kg With Holding Brake |
| Protection Class | IP65 |
| Insulation Class | F |
| Maximum Speed | 3200 rpm |
Technical Performance
The REXROTH R911312800 MSK071D-0200-NN-S1-UP1-NNNN is intended for servo axes where torque accuracy, repeatability, and controlled motion are more important than simple rotational output. The MSK071D frame provides higher torque capacity than smaller MSK motors while still keeping the installation size relatively compact. This makes it useful for medium-load motion systems, including feed axes, rotary tables, indexing stations, synchronized conveyors, packaging units, and mechanical handling systems.
| Technical Parameter | Value |
|---|---|
| Continuous Torque at Standstill 60 K | 17.5 Nm |
| Continuous Current at Standstill 60 K | 7.3 A |
| Continuous Torque at Standstill 100 K | 20.0 Nm |
| Continuous Current at Standstill 100 K | 8.6 A |
| Continuous Torque With Surface Cooling Reference | 26.3 Nm |
| Continuous Current With Surface Cooling Reference | 11.0 A |
| Maximum Torque | 66.0 Nm |
| Maximum Current | 32.8 A |
| Torque Constant at 20 °C | 2.63 Nm/A |
| Voltage Constant at 20 °C | 162.0 V/min⁻¹ |
| Winding Resistance at 20 °C | 1.90 Ohm |
| Winding Inductance | 14.200 mH |
| Number of Pole Pairs | 4 |
| Rotor Moment of Inertia Without Brake | 0.00255 kg·m² |
| Thermal Time Constant | 54.0 min |
| Sound Pressure Level | Less Than 75 dB(A) |
| Operating Ambient Temperature | 0 to 40 °C |
| Degree of Protection | IP65 |
| Insulation Class | F |
The values above are based on the Rexroth MSK071D-0200-NN technical data table. Manufacturing tolerance applies to some electrical constants, and actual system performance also depends on the matched drive controller, motor cable, mechanical coupling, ambient temperature, duty cycle, and drive parameterization.
Product Weight and Logistics Information
For industrial procurement and shipping, the weight of this servo motor should be stated carefully. The MSK071D technical data lists a mass of 18.0 kg for the motor without holding brake and 19.6 kg for the motor with holding brake. Because MSK071D-0200-NN-S1-UP1-NNNN includes the holding brake configuration, the practical product weight should be listed as approximately 19.6 kg.
| Weight Category | Approximate Value |
|---|---|
| Motor Weight Without Holding Brake | 18.0 kg |
| Motor Weight With Holding Brake | 19.6 kg |
| Recommended Net Product Weight for R911312800 | 19.6 kg |
| Gross Shipping Weight | Depends on packing method |
| Packing Note | Wooden box, foam protection, shaft cover, and export pallet may increase total weight |
The net weight is useful for machine design, mounting structure evaluation, and spare-part identification. The gross weight should be confirmed before shipment because packaging can vary by supplier, country, transportation method, and whether the motor is new, refurbished, or used.
Type Code Interpretation
The full model code gives important information about the motor configuration. For Rexroth MSK motors, small code differences can change the encoder type, brake option, shaft style, connector layout, and mechanical compatibility. Therefore, it is not enough to identify only “MSK071D-0200.” The complete code should be checked before purchase.
| Code Section | Meaning |
|---|---|
| MSK | Rexroth IndraDyn S synchronous servo motor series |
| 071D | Frame size and motor length class |
| 0200 | Winding design |
| NN | Natural convection cooling |
| S1 | Singleturn optical encoder configuration |
| UP1 | Shaft with keyway, shaft sealing ring, and holding brake 1 |
| NNNN | Standard additional configuration |
The S1 encoder is suitable for applications where singleturn absolute feedback is sufficient. It helps the servo drive determine rotor position accurately and supports stable commutation and motion control. For applications requiring absolute position retention over multiple shaft revolutions after power-off, a multiturn encoder version would normally be considered instead.
Functional Advantages
The REXROTH R911312800 MSK071D-0200-NN-S1-UP1-NNNN offers a balanced combination of torque, size, encoder feedback, and industrial durability. Its 66.0 Nm maximum torque allows the motor to support short-term acceleration and dynamic load changes. Its 20.0 Nm continuous standstill torque at 100 K makes it suitable for applications that require steady holding or controlled low-speed operation under load.
| Advantage | Practical Benefit |
|---|---|
| High Torque Density | Delivers strong output in a compact frame size |
| Natural Cooling | Simplifies installation where external cooling is not required |
| Holding Brake | Helps hold the axis when the drive is disabled |
| Optical Encoder Feedback | Supports accurate servo control and stable motion response |
| IP65 Protection | Suitable for many machine-mounted industrial environments |
| Shaft With Keyway | Useful where positive mechanical torque transmission is required |
| 3200 rpm Maximum Speed | Supports medium-speed servo applications |
The holding brake should be used as a holding device, not as a repeated dynamic braking mechanism. For vertical axes, suspended loads, or safety-related motion, the final machine design should include proper safety assessment, brake control logic, and mechanical protection.
Typical Application Areas
This servo motor can be used in many automation systems that require controlled motion rather than simple open-loop rotation. It is especially suitable for machines where accuracy, repeatability, and load stability are required.
| Industry | Typical Application |
|---|---|
| Packaging Machinery | Feed rollers, sealing units, indexing axes, cutting stations |
| Printing Equipment | Web feed control, roller synchronization, tension-related axes |
| Machine Tools | Auxiliary feed axes, tool-changing systems, positioning mechanisms |
| Handling Equipment | Transfer units, lifting mechanisms, rotary positioning systems |
| Assembly Machinery | Pressing stations, rotating fixtures, automatic production cells |
| Plastic and Rubber Machinery | Feeding, cutting, winding, and auxiliary servo axes |
| General Automation | Medium-load servo axis control and replacement projects |
Replacement and Procurement Notes
When replacing an existing motor, the safest method is to compare the nameplate, machine documentation, drive parameters, and cable interface. The order number R911312800 should be matched together with the full model MSK071D-0200-NN-S1-UP1-NNNN. A motor with a similar basic frame but a different encoder, brake, or shaft option may not be a direct replacement.
| Checkpoint | Reason |
|---|---|
| Order Number | Confirms the exact Rexroth material configuration |
| Full Type Code | Prevents encoder, brake, shaft, or seal mismatch |
| Encoder Type | Must match drive parameter and feedback requirement |
| Brake Option | Important for vertical or holding-load axes |
| Shaft Design | Must match coupling, keyway, and mechanical layout |
| Cable Interface | Must match existing motor and encoder cables |
| Drive Compatibility | Should be checked with the IndraDrive configuration |
| Physical Condition | New, refurbished, or used condition affects service life |
SEO-Oriented Summary
The REXROTH R911312800 MSK071D-0200-NN-S1-UP1-NNNN synchronous servo motor is a reliable MSK071D IndraDyn S motor for industrial automation equipment. It features a 0200 winding, natural convection cooling, singleturn optical encoder, shaft with keyway, shaft sealing ring, holding brake, IP65 protection, and an approximate weight of 19.6 kg with brake. With 17.5 Nm continuous standstill torque at 60 K, 20.0 Nm continuous standstill torque at 100 K, 66.0 Nm maximum torque, and 3200 rpm maximum speed, this motor is suitable for packaging machines, printing systems, handling equipment, machine tools, assembly lines, and other precision motion-control applications. For replacement or spare-part purchasing, users should confirm both the order number R911312800 and the full model code MSK071D-0200-NN-S1-UP1-NNNN to avoid configuration mismatch.
