Rexroth R911315897 MSK071E-0200-NN-M1-UP1-NNNN Servo Motor

The REXROTH R911315897 MSK071E-0200-NN-M1-UP1-NNNN is an IndraDyn S synchronous servo motor developed for precise industrial motion control. It is designed for automated machinery that requires reliable shaft positioning, stable torque delivery, repeatable speed control, and strong dynamic response. This model belongs to the MSK071E motor frame and uses the 0200 winding configuration, natural convection cooling, a multiturn absolute optical encoder, a shaft with keyway, and an electrically released holding brake.

For purchasing and spare part replacement, the complete identification should be written as R911315897 MSK071E-0200-NN-M1-UP1-NNNN. The material number R911315897 is useful for procurement and inventory control, while the full motor code defines the technical configuration. Motors with similar MSK071E-0200 prefixes can still differ in encoder type, brake option, shaft style, connector arrangement, and design version. Therefore, the full type code should always be checked before replacement.

The reference product weight for this model is 23.5 kg. This value is suitable for product descriptions, technical listings, warehouse records, and preliminary shipping estimates. For international packing, the final gross weight may be higher because of carton, foam, moisture protection, wooden case, or pallet packaging.

Technical Specification Table

The REXROTH R911315897 servo motor is intended for closed-loop drive systems, not for simple open-loop rotation. In a servo axis, the motor works with a servo drive, encoder feedback, machine controller, and mechanical transmission to regulate torque, speed, and position. This allows the machine to perform controlled acceleration, accurate stopping, synchronized movement, and repeatable positioning over long production cycles.

This motor is suitable for packaging machinery, automated handling systems, feed axes, indexing equipment, printing machines, forming machines, assembly lines, test equipment, and other production systems where accurate movement is essential. The MSK071E frame provides a strong balance between compact size and torque capability. It is large enough for demanding industrial axes but still compact enough for machines where installation space is limited.

One important feature of this model is the M1 multiturn absolute optical encoder. The encoder provides position information to the drive and controller. Because it is a multiturn absolute encoder, it can track the shaft position across multiple revolutions. This helps reduce homing requirements after restart and improves machine availability in automated production. For axes such as rotary tables, material feeders, synchronized rollers, vertical positioning units, and handling arms, reliable position feedback is critical to stable operation.

The Hiperface encoder interface is widely used in servo systems and supports communication between the motor feedback device and the servo drive. The 128 signal period encoder structure provides precise shaft feedback for controlled motion. The 240 degree rotatable connector also helps during installation because the cable exit direction can be adapted to the available space inside the machine. This is useful in compact multi-axis machines where cable routing, bend radius, and connector clearance are often difficult.

The UP1 configuration is a key difference between this model and smooth-shaft variants. The “P” shaft code indicates a shaft with keyway, which provides a positive mechanical connection to couplings, pulleys, gearboxes, or other driven components. A keyed shaft is often preferred where slip prevention is important or where the transmission design requires a mechanical key for torque transfer. Correct coupling alignment is still essential. Poor shaft alignment can increase bearing load, generate vibration, reduce service life, and cause unstable axis behavior.

The “1” brake code indicates an integrated electrically released holding brake. This brake provides 23 Nm of static holding torque. It is useful for axes that must hold position when the drive is disabled, especially vertical axes, suspended loads, clamping mechanisms, or equipment sections where unexpected movement must be prevented after shutdown. The brake should be understood as a holding brake, not as a normal dynamic braking device for repeated high-speed stopping. The drive and machine sequence should stop the motor before the brake is applied.

The 0200 winding code gives this motor a torque-speed characteristic suitable for industrial servo applications where controlled power and stable torque are more important than only maximum speed. The published reference values include 28.0 Nm continuous torque at standstill at 100 K and 84 Nm maximum torque. These values make the motor useful for axes requiring strong acceleration capacity and controlled load movement. Actual usable performance depends on the servo drive, DC bus voltage, current limit, cooling condition, cable length, ambient temperature, duty cycle, and load inertia.

The NN cooling code means that the motor uses natural convection cooling. Heat is dissipated through the motor housing and the surrounding mounting structure without an external fan or liquid cooling unit. This can simplify the machine design and reduce auxiliary maintenance points. However, natural convection cooling still requires correct thermal sizing. The installation environment, ambient temperature, mounting surface, duty cycle, and continuous load must be considered during system design.

The motor’s IP65 protection rating supports use in industrial environments where dust and low-pressure water exposure may occur, provided that the motor is installed correctly with suitable cables and connectors. This makes the unit suitable for enclosed machinery, production lines, and automation equipment where robust protection is required. Even with IP65 protection, the motor should not be exposed to conditions outside the permitted installation environment or handled in a way that damages seals, connectors, or encoder components.

From a logistics and maintenance viewpoint, the 23.5 kg reference weight means the motor should be handled with proper support. During installation, the shaft end, encoder side, plug connectors, and mounting flange should be protected from impact. If the motor is shipped internationally, protective packaging should prevent vibration damage, moisture ingress, shaft impact, and connector deformation. The packed weight may exceed the motor net weight depending on the export packing method.

The REXROTH R911315897 MSK071E-0200-NN-M1-UP1-NNNN is a practical servo motor for industrial users who require accurate motion control, keyed shaft torque transmission, multiturn absolute feedback, and brake-assisted holding capability. Its combination of MSK071E frame size, 0200 winding, natural convection cooling, M1 Hiperface encoder, keyed shaft, and 23 Nm holding brake makes it suitable for many medium-duty servo axes. Before purchase or installation, users should verify the full type code, existing drive compatibility, encoder interface, brake requirement, shaft coupling design, cable set, and load profile to ensure correct system operation.