Rexroth Indramat MK/MKE Series Hydraulic Motor Replacement | MK12 MKE12 MK18 MK23

Genlu Hydraulic proudly introduces our industrial-grade MK/MKE Series hydraulic motors. Fully engineered to match Rexroth (Indramat) global standards, this series provides a high-performance, seamless drop-in replacement for precision industrial applications, including injection molding and automated control systems. We specifically highlight our supply capability for precision-tuned units such as the MK12, MKE12, MK18 (e.g., MKE18-1-A21-F19-1340-8D88), MK23, and MKE23.

The MK/MKE series is renowned for its compact design, rapid response, and smooth performance at extremely low RPMs. Genlu guarantees 100% Drop-in Interchangeability across mounting dimensions, splined-shaft specs, seal architecture, and torque characteristics compared to original Rexroth MK/MKE assemblies. Every motor undergoes 100% full-pressure load and dynamic-balance testing on our digital test benches, certifying precise, long-term performance for your critical industrial control circuits.

Technical Specifications 

• Product Series: Rexroth (Indramat) MK/MKE Series Hydraulic Motor

• Representative Models: MK12, MKE12, MK18 (MKE18-1-A21-F19-1340-8D88), MK23, MKE23

• Displacement: Model-specific (12cc, 18cc, 23cc, etc.)

• Nominal Operating Pressure: 250 – 350 bar

• Max Rated Speed: 3000 – 5000 rpm

• Control Interface: High-Response Servo/Proportional Interface

• Mounting Configuration: Industrial Integration Standard

• Shaft Style: High-Precision Involute Splined Shaft

Key Technical Advantages:

• Elite Low-Speed Smoothness: Optimized friction-pair design eliminates “stick-slip” at low speeds, enabling high-accuracy positioning required for servo-driven molding and automation.

• High-Pressure Seal Integrity: Equipped with high-grade FKM (Fluorocarbon) seals in critical dynamic areas, ensuring leak-free performance and system pressure stability under intense, continuous duty cycles.

• High-Rigidity Housing: Cast from reinforced ductile iron, the motor housing offers exceptional structural rigidity, absorbing high-frequency reversal shocks to extend the overall component service life.

• True Drop-in Compatibility: Every unit strictly replicates original Rexroth mounting geometry and port configurations, ensuring an effortless installation without requiring modifications to existing manifolds or servo-controllers.

Application Areas:

• Injection Molding: Plasticizing screw drives and mold opening/closing control.

• Automated Industrial Systems: Precision positioning drives and hydraulic actuator units for robotic arms.

• Specialized Machinery: Servo-hydraulic presses and high-accuracy material-feeding drive systems.

Expert Maintenance Tips:

• Case Drain Management: As high-response units, MK/MKE motors require unrestricted case drain lines leading directly to the reservoir. Backpressure will cause immediate shaft-seal failure and external leakage.

• Fluid Cleanliness Standards: Internal tolerances are exceptionally tight. Adhere to ISO 4406 17/15/12 filtration standards to prevent microscopic debris from scoring the precision valve-plate surfaces.

• Servo-Valve Protection: When integrated with servo-valves, ensure the system is completely purged of air before startup. Cavitation is the primary cause of damage in these high-response motor circuits.