Contact Wake Industrial by calling 1-919-443-0207, sending an email to sales@wakeindustrial.com, or by filling out the quote form on this page to receive a comprehensive, industry competitive quote FAST. Wake Industrial supplies Rexroth servo motors for buyers who need replacement motion hardware, surplus inventory, or repair options for installed automation systems. Rexroth 2AD, MHD, MSK, and MKD motors are used across machine tools, packaging equipment, printing and paper machinery, food-processing equipment, handling systems, metal-forming machinery, and other industrial motion platforms. These motors should be ordered by complete type code because frame size, winding, feedback, brake, shaft, cooling, connector direction, and mounting style can change from one part number to another.

For maintenance teams, the most important step is identifying the installed motor exactly before sourcing a replacement. A Rexroth servo motor may share the same base series with many similar-looking units, but the full code determines whether it will physically mount, connect to the existing cables, communicate with the drive, and handle the required axis load. Wake Industrial helps buyers source exact-match Rexroth servo motors for emergency replacement, spare stocking, and legacy system support. If a Rexroth servo motor fails, matching only the series or frame size is not enough. A replacement should be quoted from the full nameplate number, including every suffix and option code. Wake Industrial can help source replacement Rexroth servo motors, quote repair options, and support facilities that need hard-to-find Bosch Rexroth Indramat motor models quickly.

Rexroth Servo Motor Series Overview

Rexroth 2AD, MHD, MSK, and MKD motors cover several generations and construction styles. The 2AD family is a housed asynchronous motor platform used in spindle and servo-drive applications with blower cooling. MHD and MKD motors are permanent-magnet synchronous servo motors with integrated feedback and electronic commutation. MSK IndraDyn S motors are compact synchronous servomotors with broad frame coverage, multiple encoder options, natural convection, optional fan cooling on selected sizes, and liquid-cooling availability on selected sizes.

These four motor families are often found in different generations of Rexroth motion systems, so the replacement process should consider both the motor and the drive platform it operates with. A plant may have older MKD or 2AD motors installed on legacy Indramat systems while newer equipment uses MHD or MSK motors. Even when the application is similar, the feedback system, power connection, and mechanical package can vary significantly between series.

The 2AD series includes housed, squirrel-cage induction motors with fixed blower units for surface ventilation. These motors are used as rotary main-spindle and servo-drive motors and are configured by type code for frame size, motor length, construction, power terminal position, terminal output direction, cooling mode, winding designation, brake, feedback, shaft, bearing, and vibration grade. Because the series includes multiple cooling and connection options, replacing a 2AD motor requires more than matching the frame size. The complete part number should be checked before ordering.

2AD motors are frequently associated with demanding spindle and machine-axis applications where mechanical fit and ventilation layout are critical. The blower arrangement, terminal position, and shaft configuration can affect how the motor fits into the machine enclosure and how it connects to the existing cabling. When sourcing a replacement, buyers should confirm the mounting style, feedback type, winding designation, and shaft option before approving a quote.

MHD synchronous motors are permanent-magnet servo motors used with Bosch Rexroth digital drive controllers. They are designed for industrial automation systems requiring controlled rotary motion, feedback-based speed and position control, and strong repeatability in cyclic motion applications. MHD motors use type-code positions for frame size, frame length, winding code, motor feedback, shaft, holding brake, and connector direction. When replacing an MHD motor, the encoder and shaft characters should be checked carefully because they directly affect drive feedback and coupling compatibility.

MHD motors are commonly selected for applications that need high dynamics, reliable feedback, and enclosed motor construction for industrial environments. The series includes multiple frame sizes and torque classes, making the full type code important for both mechanical and electrical matching. Buyers should pay close attention to whether the motor uses a plain shaft or keyway shaft, whether a brake is included, and whether the feedback is relative or multiturn absolute.

MSK IndraDyn S motors are synchronous servomotors with high torque density, fine size gradation, and a broad performance range. The MSK type code identifies the motor frame size, frame length, winding, cooling type, encoder, electrical connection, shaft design, holding brake, shaft runout, and additional version details. Natural convection is identified by “NN” in the cooling position, while other cooling options apply to selected configurations. Encoder options such as S1, M1, S3, and M3 should be matched to the drive system because feedback compatibility is central to startup and operation.

MSK motors are often used where compact dimensions and strong servo performance are required in a modern Rexroth drive system. Their type code contains more configuration detail than many older motor families, so a visually similar MSK motor may still have a different encoder, brake, connector orientation, or shaft option. Matching the installed code is especially important when replacing motors on multi-axis machines where each axis may use a slightly different configuration.

MKD motors are AC servo motors used as servo and main drive motors in Rexroth Indramat digital drive systems. They are permanent-magnet motors with electronic commutation and integrated feedback. The MKD type code defines motor size, length, winding code, feedback type, output shaft, holding brake, connector direction, and other design details. Common replacement checks include whether the motor uses standard resolver feedback or resolver feedback with integrated multiturn absolute encoder, whether the shaft is plain or keyed, and whether a holding brake is included.

MKD motors are widely found on older Rexroth Indramat machines, which makes accurate replacement sourcing important for facilities maintaining legacy production equipment. Since many MKD motors are still in active service, buyers often need exact replacements rather than redesigns or substitutions. The feedback and shaft options are especially important because the wrong combination can create drive compatibility issues or require mechanical changes at the machine.

The KSM series adds IndraDrive Mi cabinet-free drive technology to the Rexroth servo motor lineup. Unlike a conventional servo motor that depends on a separate cabinet-mounted drive controller, KSM units combine the servo motor, inverter electronics, control electronics, and firmware into one motor-integrated package. This design reduces control cabinet space, simplifies machine wiring through hybrid power/communication cabling, and supports decentralized motion architectures where the drive electronics are placed close to the axis.

KSM motor-integrated servo drives are most useful when a machine builder or maintenance team needs compact axis control with fewer external drive components. The type code identifies the basic motor size, winding, natural convection cooling, encoder type, hybrid connection, shaft style, holding brake, communication, safety technology, DC bus voltage, and firmware requirement. When replacing a KSM unit, the complete type code must be matched because differences in encoder, brake, safety option, shaft, or master communication can affect both electrical compatibility and machine safety behavior.

The MKE series consists of Rexroth synchronous servo motors designed for potentially explosive areas. These motors are built for hazardous-location applications where explosive mixtures of air with flammable gases, vapors, mist, or dust may occur. The series is used in industries such as chemical processing, printing, woodworking, milling, food processing, refineries, and tank farms, and it supports configurations for ATEX and UL/CSA requirements depending on the housing design.

MKE motors use permanent-magnet construction with electronic commutation, low-inertia rotor design, integrated encoder systems, optional electrically released holding brakes, and IP65 enclosed motor construction. Type-code details identify motor size, frame length, winding, encoder, shaft, holding brake, connection orientation, housing standard, and cable entry. When sourcing an MKE replacement, the hazardous-area certification style and connection standard are especially important because an incorrect housing or connection option may not meet the installed machine’s safety requirements.

The MDD series includes digital AC servo motors used with intelligent digital Indramat drive controllers. These permanent-magnet synchronous motors are designed for high-response automation systems and are used in tool machines, textile machinery, printing machinery, packaging equipment, robotics, handling equipment, transfer facilities, auxiliary axes, tool changers, and roller-feed applications. MDD motors are especially associated with high contouring accuracy at high feed rates and high dynamic performance in compact machine axes.

MDD motors use brushless construction, lifetime-lubricated bearings, sealed housings, integrated motor temperature monitoring, and either resolver feedback or digital servo feedback depending on the motor line and type code. The type code identifies size, length, housing design, nominal speed, balance class, side-B shaft end, feedback type, centering diameter, output shaft, power connection direction, and blocking brake option. For replacements, the feedback character and brake character should be checked carefully because they affect drive setup, homing behavior, and axis holding capability.

The MAC series includes AC servo motors used with Indramat TDM, KDS, and DSC drive controllers. These permanent-magnet, electronically commutated motors were built for rapid-response servo drive applications in machine tools, textile machines, printing presses, packaging machinery, robotics, handling equipment, and transfer systems. MAC motors use tachofeedback as the standard motor feedback system, and selected configurations can include mounted incremental or absolute encoders for position evaluation.

MAC motors are designed for high operating reliability through brushless construction, lifetime-lubricated bearings, enclosed IP65 motor construction, temperature monitoring through thermo switches, and direct connection through power, tachofeedback, and encoder connectors. The series supports plain or keyed output shafts, optional holding brakes, natural convection, axial surface cooling, and radial surface cooling depending on the motor size and configuration. When replacing a MAC motor, the power connector direction, feedback option, cooling style, centering diameter, and brake option should be matched from the full type code.

NEED AN INDRAMAT MOTOR REPAIRED?

Contact Wake Industrial by calling 1-919-443-0207, sending an email to sales@wakeindustrial.com, or by filling out the quote form on this page to receive a comprehensive, industry competitive quote FAST. Wake Industrial supplies repair, replacement, and surplus options for industrial servo motors, synchronous motors, induction motors, integrated servo drives, and stepper motors used in automated machinery. Facilities contact Wake Industrial when a servo motor has encoder feedback faults, winding damage, brake failure, connector damage, bearing wear, overheating, contamination, or physical damage from machine crashes. Wake Industrial is not an authorized distributor of these manufacturers and does not provide OEM technical support, but we can help source, repair, refurbish, or replace industrial automation motors used in production equipment. 

(Please be advised that Wake Industrial does not offer troubleshooting assistance through phone or email. For repair, replacement, or refurbishment needs, we invite you to use our quote form or call us at 1-919-443-0207. Wake Industrial is NOT an authorized distributor for these products.)