Rexroth R911311905 MSK100B-0200-NN-M2-AG0-RNNN Servo Motor

The REXROTH R911311905 MSK100B-0200-NN-M2-AG0-RNNN is a high-performance synchronous servo motor from the IndraDyn S MSK motor family, designed for demanding industrial automation systems that require strong torque output, reliable feedback accuracy, and stable operation under continuous production conditions. As part of the MSK100B frame size, this motor is suitable for machine axes where compact installation space must be balanced with high mechanical power density. It is commonly used in CNC machinery, packaging equipment, printing machinery, handling systems, forming machines, test benches, and automated production lines that rely on precise speed and position control.

This model is identified by the material number R911311905 and the full type code MSK100B-0200-NN-M2-AG0-RNNN. The type code indicates an MSK series synchronous servo motor with the 100B motor size, 0200 winding, natural convection cooling configuration, multiturn absolute encoder feedback, and a shaft/brake arrangement suitable for integration into servo-driven machine axes. The approximate product weight is 33.9 kg, based on published MSK100B-0200-NN platform data. For export, spare part replacement, and machine maintenance planning, this weight should be treated as the motor net weight reference; packing weight may be higher depending on wooden case, carton, foam protection, or pallet requirements.

The REXROTH R911311905 servo motor is engineered for applications where dynamic movement and repeatable positioning are critical. Unlike general-purpose AC motors, this unit is intended to operate as part of a closed-loop drive system. In a servo system, the motor, encoder, servo drive, and machine controller work together to regulate torque, speed, and position in real time. This makes the MSK100B-0200-NN-M2-AG0-RNNN suitable for axes that must accelerate quickly, stop accurately, and maintain controlled motion even under changing mechanical load.

A key advantage of the MSK100B platform is its strong torque density. The 100B frame size gives the motor a robust mechanical structure while still allowing integration into compact machine assemblies. For equipment builders, this helps reduce the space required for high-output servo axes. For maintenance teams, the use of a standardized Rexroth MSK motor type code makes replacement identification easier, especially when the original machine documentation lists both the material number and the type designation.

The M2 encoder configuration is an important feature for precision automation. A multiturn absolute feedback system allows the drive system to know the motor shaft position across multiple revolutions. This is especially valuable in machines where the axis position must be retained after power loss or where homing cycles should be reduced. Applications such as rotary indexing tables, vertical handling axes, synchronized feed rollers, and coordinated multi-axis machinery can benefit from this type of feedback arrangement.

The NN cooling designation indicates natural convection cooling. This means the motor is designed to dissipate heat through its housing and surrounding installation environment without relying on an external fan or liquid cooling circuit. Natural convection motors are often preferred in applications where lower maintenance, simpler installation, and reduced auxiliary components are important. However, final performance still depends on mounting conditions, ambient temperature, duty cycle, and the thermal design of the machine frame. For high-duty-cycle applications, thermal margins should always be checked against the drive configuration and machine load profile.

Mechanically, the REXROTH MSK100B-0200-NN-M2-AG0-RNNN is built for industrial environments where vibration, repeated acceleration, and long operating hours are expected. The motor housing, bearing arrangement, shaft interface, and feedback system are designed to support accurate torque transmission and reliable servo response. When installed correctly, this motor can contribute to smoother axis movement, lower positioning error, and improved process repeatability.

This servo motor is typically paired with Rexroth IndraDrive servo drive systems. Correct matching of the motor and drive is essential. The drive must support the encoder interface, motor current rating, firmware configuration, and application requirements. Before replacing an existing motor, users should compare the complete type code, not only the MSK100B-0200 portion. Small differences in encoder type, brake configuration, shaft design, connector orientation, or special design code may affect compatibility with the machine.

For maintenance and procurement, the full identification should be kept as REXROTH R911311905 MSK100B-0200-NN-M2-AG0-RNNN. The material number is especially useful when sourcing the correct spare part, while the model code provides the technical configuration. Using only a partial model such as “MSK100B” may lead to an incorrect replacement because the MSK100B family contains multiple winding, encoder, brake, shaft, and cooling variants.

In logistics planning, the approximate 33.9 kg net weight means the motor should be handled as a medium-heavy industrial component. Manual lifting may not be appropriate in many workshops, especially when the motor is mounted in a confined machine area. Safe handling equipment, stable packaging, and proper shaft protection are recommended during storage and transportation. The encoder and connector areas should be protected from impact, moisture, and contamination.

The REXROTH R911311905 MSK100B-0200-NN-M2-AG0-RNNN is well suited for users who need a reliable servo motor for high-precision automation equipment. Its combination of MSK100B frame size, 0200 winding, natural convection design, multiturn absolute feedback, and industrial servo construction makes it a strong choice for machinery requiring controlled motion, repeatable positioning, and dependable integration with Rexroth drive platforms. For best results, the motor should be selected and commissioned according to the complete machine axis data, including load inertia, required torque, speed range, duty cycle, mounting position, cable type, and drive compatibility.