R911288626 (MHD112C-035-NG0-LN)

MHD Synchronous Motors

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The Bosch Rexroth R911288626 (MHD112C-035-NG0-LN) is a liquid-cooled synchronous servo motor engineered for demanding industrial tasks requiring precise speed and position control. It achieves a maximum speed of 4000 rpm and a peak current of 139.5 A, with a winding inductivity of 4.2 mH and four pole pairs. The motor provides a continuous standstill torque of 38.0 Nm and supports high-speed reciprocating applications due to its low rotor inertia. Features include a plain shaft with seal, flange size of 192 mm, centering diameter of 130 mm, and digital servo feedback encoder for relative position detection. The unit is IP65 rated and suitable for elevations up to 1000 meters.

Technical Specifications

Type
Synchronous Motor

Characteristic Speed
3000 RPM

Peak Current
139.5 A

Maximum Speed
4000 RPM

Start-Stop Support
Yes

Ingress Protection
IP 65

Operational Altitude
Up to 1000 meters above sea level

Pole Pairs
4

Winding Inductance
4.2 mH

Frequently Asked Questions

How does the 38.0 Nm continuous torque at standstill translate to application sizing for MHD112C-035-NG0-LN?

The continuous torque rating defines thermal steady-state capability for holding and low-speed axes without overheating. It simplifies gear ratio selection for indexing tables, feed drives or winders needing sustained torque at zero or near-zero speed.

What encoder architecture is used on MHD112C-035-NG0-LN, and how does relative detection affect commissioning?

It uses a digital servo feedback (HSF) encoder with relative position detection. It enables quick homing procedures and seamless controller pairing while keeping wiring simple for aiding rapid start-ups and maintenance repeatability.

Why is liquid cooling advantageous on the MHD112C-035-NG0-LN in dense multi-axis cells?

It removes losses at the stator efficiently for allowing higher continuous output in constrained enclosures. It reduces heat soak into cabinets and nearby mechanics for improving bearing life and neighboring axis reliability.

How does the plain shaft with shaft seal on MHD112C-035-NG0-LN aid mechanical integration and uptime?

The plain, cylindrical shaft provides backlash-free, friction-locked hub connections, while the seal limits ingress at the coupling. It maintains concentricity, reduce fretting and protect front-end bearings in washdown-adjacent environments.

What benefits does the power connector oriented to the left provide on MHD112C-035-NG0-LN?

Its left-side power exit supports cable routing in cramped guards and multi-axis gantries. It can shorten harness length that reduces bend-radius stress and simplifies segregation from feedback cables.

Common Misspellings

Internal Product Review

Bosch Rexroth produces the motor MHD112C-035-NG0-LN with integrated ducts in the housing for liquid-cooling. It includes an HSF encoder for precise feedback using relative detection. Its 38.0 Nm standstill torque, 192 mm flange, plain-shaft with seal and left-side power connector suit machine tools, packaging, printing, textiles, woodworking and food processing lines.