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R911281728 (MHD071B-061-PP1-UN)

MHD Synchronous Motors

Rated 4.1 stars (4 total reviews)
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Expedited Lead Times on Select Parts
1 Year Warranty Included
Free Ground Shipping

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6 Minutes 2 Seconds

The Indramat MPN R911281728 (MHD071B-061-PP1-UN) is a servo motor from the MHD series, designed for industrial automation applications. It features a 4500 min-1 nominal speed, an 8.0 Nm continuous standstill torque, and a theoretical maximum torque of 32 Nm. The motor includes a holding brake with 5.0 Nm torque, liquid cooling for heat management, and a keyed shaft with seal. A digital servo feedback encoder with absolute position detection (>4096 revolutions) is integrated. The rotor has a moment of inertia of 8.7 x 10-4 kgm². The housing, in prime coat black (RAL 9005), provides protection against dust and water. Connection interfaces are turnable within a 270° range. The unit is intended for operation at ambient temperatures from 0 to 45°C and installations up to 1000 m above sea level.

Technical Specifications

Product Type
Servo Motor

Nominal Speed
4500 min-1

Output Shaft Material
Specialized Load-Sustaining Material

Feedback
Digital with Complex Encoders

Feedback Connector Rotation
Up to 270 degrees

Centering Diameter
95mm

Brake Feature
22 Nm Holding Brakes

Motor Type
Permanent Magnet Motor

Housing Protection
From Electric Shock, Water, Heat, Dust

Temperature Tolerance Limit
0 to 45 Degrees Centigrade

Usable Elevation
0 to 1000 Meters above Sea Level

Can the MHD071B-061-PP1-UN operate without external braking systems?

It includes an integrated holding brake with 5.0 Nm torque, sufficient for static load holding. However, dynamic braking during motion still requires an external controller or regenerative unit.

How does the absolute position detection over 4096 revolutions improve system reliability?

It enables accurate position recovery after power loss without homing. This minimizes machine downtime and reduces wear from repeated reference moves.

Does the keyed shaft with seal offer protection in dusty or moist environments?

Yes, the shaft seal helps block contaminants from entering the motor housing. This extends bearing life and ensures smooth mechanical operation in harsh conditions.

What flange size should be considered when retrofitting the MHD071B-061-PP1-UN?

It uses a 115 mm flange, which must match your existing mounting system. Misalignment or flange mismatch can lead to shaft stress and motor mispositioning.

How does insulation class F impact motor lifespan in this model?

Class F allows winding temperatures up to 155 °C, giving a buffer in thermally demanding applications. This enhances long-term durability under continuous or peak loads.

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Internal Product Review

The MHD071B‑061‑PP1‑UN is a liquid‑cooled synchronous servo motor by Bosch Rexroth Indramat. It offers digital servo feedback with an integrated encoder, absolute position sensing over 4096 revolutions, and 8.0 Nm standstill torque. It is commonly used in industrial automation, robotics, CNC machinery, and legacy printing/packaging systems.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MHD071B-061-PP1-UN.
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