R911291954 (MHD112C-035-PP3-BN)

MHD Synchronous Motors

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The MPN R911291954 (MHD112C-035-PP3-BN) is a synchronous servo motor from the MHD series, designed for integration with digital drive controllers in high-dynamic automation systems. It features a characteristic speed of 3,000 rpm, a maximum speed of 4,000 rpm, a continuous standstill torque of 38.0 Nm, and a holding brake torque of 70.0 Nm. The motor uses digital servo feedback with an integrated multiturn absolute encoder capable of position detection over more than 4096 revolutions. Its construction includes a black prime coated housing optimized for resistance to weathering, chemicals, and mechanical stress and supports both natural and liquid cooling. The unit measures 112 in motor size, has a flange size of 192 mm, a centering diameter of 130 mm, a keyed shaft with shaft seal, and a power connection directed to side B via an output connector. It is completely dustproof and water-resistant with an IP65 protection rating.

Technical Specifications

Product Type
Synchronous Servo Motor

Characterised Motor Speed
3000 revolutions per minute

Maximum Speed
4000 revolutions per minute

Motor Design
Maintenance-free and brushless

Bearings
Lifetime-lubricated for high loads

Cabling Support
Yes, supports various cable set designs

Mounting
Overhung, in any position

Cooling
Natural and Surface cooling supported

Protection Category
IP 65 according to EN 60529

Data Memory
Yes, for motor parameters storage

Frequently Asked Questions

For MHD112C-035-PP3-BN, how is the 70 Nm holding-brake torque typically applied in machinery safety?

The brake secures vertical or overhung axes during E-stop and power-off for preventing drift. Its correct sizing against reflected load inertia and screw back-drive ensures static holding while drives are disabled.

What does the 38.0 Nm continuous torque at standstill imply for servo sizing on holding or inching axes?

It indicates the motor can produce 38 Nm indefinitely at zero speed with adequate cooling for simplifying axes that dwell under load. Its designers can reserve dynamic margin for acceleration without exceeding thermal limits.

Why is a keyed shaft with seal beneficial on MHD112C-035-PP3-BN in dusty or coolant-rich environments?

The key provides slip-free torque transmission to pulleys or pinions, while the shaft seal limits ingress of coolant and particulates. Its combination preserves coupling integrity and bearing life.

How do Ø130 mm centering and a 192 mm flange on MHD112C-035-PP3-BN aid mechanical interchangeability?

Those standardized pilot and bolt-circle dimensions simplify retrofits into ISO-style gearboxes and frames. Its consistent datum surfaces improve concentricity for reducing coupling misalignment and vibration in high-precision assemblies.

What advantages does its digital servo feedback with integrated multiturn absolute encoder (>4096 revolutions) provide?

The multiturn absolute tracking eliminates homing after power cycles and supports deterministic positioning across gear reductions. Its integrated electronics reduce cabling, improve noise immunity and enable higher control bandwidths for tight contouring.

Common Misspellings

Internal Product Review

The Rexroth Indramat’s MHD112C-035-PP3-BN servo motor comes in an IP65 housing that gets cooled through liquid cooling mechanism. It uses keyed shaft with seal and digital servo feedback with absolute encoder. This unit delivers 38 Nm continuous standstill torque and possesses a 70 Nm holding brake. It offers flange mounting and side-B power connection to suits packaging, printing, textiles and CNC machine tools.

1620 Old Apex Road
Cary, NC 27513, USA

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International: 1-919-443-0207

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[email protected]

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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

Indramat USA sells factory new and pre-owned surplus products and maintains channels to procure supply. Indramat USA is not affiliated with nor an authorized distributor or representative of any manufacturers, brands or products listed. Designated trademarks, brand names, and brands appearing herein are the property of their respective owners.