R911278457 (MHD112D-024-NG2-RN)

MHD Synchronous Motors

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The Bosch Rexroth MPN R911278457 (MHD112D-024-NG2-RN) is a synchronous servo motor designed for integration with drive controllers in industrial automation. It features a winding code 024, a holding brake torque of 32.0 Nm, and a plain shaft with shaft seal. The motor provides continuous torque at standstill of 48.0 Nm and utilizes digital servo feedback (HSF) for relative position detection. Housing design includes liquid cooling, an F-class insulation system, a power connector with integrated temperature sensor, and a right-side power and encoder connection. The unit has a flange size of 192 mm, centering diameter of 130 mm, and is constructed to IP65 rating (DIN VDE 0470).

Technical Specifications

Product Name
Bosch Rexroth IndraDyn S (MSK) synchronous motors

Use
Servo and main drive motors

Winding Code
24

Holding Brake Torque
32.0 Nm

Electrical Connections
Power connector and encoder connector

Insulation Class
F

Housing
Black prime coating

Cooling
Natural convection

Protection Class
IP 65 according to DIN VDE 0470

Frequently Asked Questions

How do the 130 mm centering diameter and 192 mm flange of MHD112D-024-NG2-RN influence installation accuracy?

The centering spigot defines the datum for radial runout, while the standardized 192 mm flange maintains perpendicularity and bolt pattern repeatability. It reduces coupling misalignment and improves bearing life in direct-coupled axes.

When is the 32.0 Nm holding-brake torque on MHD112D-024-NG2-RN essential, and how should it be used?

It is recommended to use the brake to secure vertical or overhauling axes when the drive is disabled or in E-stop for preventing back-driving. It’s not a dynamic safety brake and apply motion-control-level holding only after axis standstill is confirmed.

How should the right-side power connector on MHD112D-024-NG2-RN be cabled for EMC and serviceability?

It routes shielded motor and feedback cables separately from mains and I/O for maintaining 360° shield terminations at drive plates, while Rexroth specifies RKL-line shielded motor cables for IndraDrive systems.

Does the MHD112D-024-NG2-RN require periodic bearing lubrication or encoder maintenance?

The MHD motors are designed as sealed, maintenance-free units with lifetime-lubricated bearings and integrated servo feedback. Its routine checks typically focus on cooling circuit integrity, connectors and vibration rather than scheduled relubrication.

How does liquid cooling improve duty cycle on the MHD112D-024-NG2-RN in continuous applications?

It increases heat rejection from the stator and housing for keeping winding temperatures within insulation limits during sustained load. It allows higher continuous torque utilization and stability under rapid start-stop profiles when correctly plumbed and bled.

Common Misspellings

Internal Product Review

The Bosch Rexroth’s MHD112D-024-NG2-RN servo motor maintains thermal stability through its liquid-cooled housing design. It offers 48 Nm standstill torque and includes a 32 Nm holding brake. This motor provides feedback through its integrated digital HSF feedback and it possesses a plain shaft that enables precise direct coupling. Its typical deployments span packaging, printing, machine-tool and materials-handling systems. It features a right-hand power connector for flexible wiring.

1620 Old Apex Road
Cary, NC 27513, USA

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International: 1-919-443-0207

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North Carolina Office

Indramat USA
1620 Old Apex Road
Cary, NC 27513
USA

Phone

Toll Free: 1-888-551-3082
International: 1-919-443-0207

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