Precise Original New Synchronous Servo Motor Rexroth R911315978 MSK070D-0300-NN-M1-UP1-NNNN Optimize Performance

The REXROTH R911315978 MSK070D-0300-NN-M1-UP1-NNNN is an IndraDyn S synchronous servo motor designed for compact, accurate, and responsive motion control in industrial automation equipment. It belongs to the Rexroth MSK motor family, a widely used servo motor platform for applications that require reliable torque output, precise shaft feedback, fast dynamic response, and long-term stability in machine operation. This model combines the MSK070D frame size, 0300 winding configuration, natural convection cooling, M1 multiturn absolute encoder feedback, a keyed shaft, and an electrically released holding brake.

The complete identification of this product is R911315978 MSK070D-0300-NN-M1-UP1-NNNN. The material number R911315978 is used for purchasing, replacement, inventory records, and spare part matching. The full model code is equally important because it defines the exact technical configuration of the motor. In the Rexroth MSK series, motors with similar model prefixes may still differ in encoder type, shaft design, holding brake, connector orientation, winding, or special design code. For this reason, the complete model should be checked before replacement or quotation.

The reference product weight for this model is approximately 13.9 kg. This value is suitable for online product description, warehouse listing, and preliminary logistics planning. For export shipment, the gross weight may be higher because of carton packaging, foam protection, shaft protection, moisture barrier, wooden case, or pallet packing. A practical packed weight estimate is normally higher than the motor net weight, especially when the motor is shipped as a replacement spare part.

Technical Specification Table

The REXROTH R911315978 MSK070D-0300-NN-M1-UP1-NNNN is suitable for automation systems where a machine axis must move accurately, stop consistently, and repeat the same motion cycle over long operating periods. It can be applied in packaging machines, material handling equipment, printing systems, textile machinery, small forming machines, feed axes, indexing units, assembly equipment, and other industrial machines that require closed-loop motion control. The motor is not intended to operate as a simple standalone AC motor. It is designed to work with a servo drive, feedback system, machine controller, and mechanical transmission.

The MSK070D frame size gives this motor a useful balance between compact installation dimensions and strong torque capability. It is smaller and lighter than larger MSK071E or MSK100 frame motors, but it still provides enough torque for many medium-duty servo axes. This makes it practical for machine designs where available space is limited but accurate servo performance is still required. The approximate 13.9 kg reference weight also makes the motor easier to handle than heavier frame sizes, although proper lifting and support are still recommended during installation.

The 0300 winding configuration provides a performance profile suitable for high-response motion tasks. With a continuous torque reference of 20.0 Nm and a maximum torque reference of 52.5 Nm, the motor can support controlled acceleration, deceleration, and load movement when paired with a correctly selected servo drive. The maximum speed reference of 4900 rpm gives the motor enough speed range for many automated production axes. Actual performance depends on drive rating, DC bus voltage, current limits, thermal condition, cable length, duty cycle, and mechanical load inertia.

A key advantage of this model is its M1 multiturn absolute optical encoder. The encoder supplies position feedback to the servo drive and controller. Because it is a multiturn absolute encoder, it can identify shaft position over multiple revolutions. This improves machine restart behavior and reduces the need for repeated homing routines in many applications. For rotary indexing units, synchronized feeders, vertical positioning axes, and automated transfer systems, accurate feedback is essential for stable process control.

The Hiperface encoder interface supports communication between the motor feedback device and the servo drive. Correct encoder matching is critical in replacement work. If a motor with the wrong encoder type is installed, the drive may not recognize the feedback system correctly, or the machine may require different parameter settings. For this reason, the M1 code should be verified against the existing motor nameplate and the servo drive configuration before installation.

The UP1 part of the type code is especially important. The “P” shaft code indicates a shaft with keyway, which is used for secure torque transmission through keyed couplings, pulleys, gearboxes, or other mechanical drive elements. A keyed shaft is often preferred when slip prevention is important or when the driven equipment is designed for a positive mechanical connection. The “1” brake code indicates an integrated holding brake. This electrically released brake provides 23 Nm of holding torque and is mainly used to hold the axis when the drive is disabled or power is removed.

The holding brake should not be used as a regular dynamic braking device for repeated high-speed stopping. Its main function is to hold a stationary axis after motion has stopped. This is important in vertical axes, suspended-load mechanisms, clamping units, or machine sections where unwanted movement after shutdown would create production or safety risks. The correct control sequence should allow the servo drive to stop the axis before the holding brake is applied.

The NN cooling code means the motor uses natural convection cooling. This reduces system complexity because no external fan or liquid cooling circuit is required. Heat is dissipated through the motor housing and the machine mounting surface. However, natural convection still requires correct thermal sizing. Ambient temperature, mounting condition, load cycle, acceleration frequency, and continuous current demand can affect the motor temperature. For high-duty operation, the motor and drive combination should be checked against the machine axis requirement.

The motor’s IP65 protection class supports operation in industrial environments where dust and limited water exposure may be present, provided the motor is installed with suitable cables and connectors. This makes the unit suitable for enclosed machines, production lines, and automation equipment. During installation and maintenance, the connector area, encoder side, shaft seal, and flange surfaces should be protected from impact, moisture, and contamination.

For procurement, the recommended product name is REXROTH R911315978 MSK070D-0300-NN-M1-UP1-NNNN Synchronous Servo Motor. This title includes both the material number and the complete model code, improving search accuracy and reducing the risk of confusing it with similar MSK070D variants. Partial descriptions such as “MSK070D servo motor” or “MSK070D-0300 motor” are not sufficient for accurate replacement because the MSK070D family includes multiple encoder, brake, shaft, and design configurations.

The REXROTH R911315978 MSK070D-0300-NN-M1-UP1-NNNN is a practical servo motor for users who need compact motion control, keyed shaft torque transmission, multiturn absolute position feedback, and brake-assisted holding capability. Its combination of MSK070D frame size, 0300 winding, natural convection cooling, M1 Hiperface encoder, keyed shaft, 23 Nm holding brake, and IP65 industrial protection makes it suitable for many automated machine axes. Before purchase or installation, users should verify the full type code, motor nameplate, servo drive compatibility, encoder interface, brake requirement, cable set, mechanical mounting dimensions, and load profile to ensure correct operation.