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R911279155 (MHD071B-061-NP1-UN)

MHD Synchronous Motors

Rated 4.4 stars (11 total reviews)
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1 Year Warranty Included
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Expedited Lead Times on Select Parts
1 Year Warranty Included
Free Ground Shipping

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4 Minutes 9 Seconds

The R911279155 (MHD071B-061-NP1-UN) is a Bosch Rexroth Indramat synchronous servo motor from the MHD series, specified with a 115 mm flange size and 95 mm centering diameter. It features a factory Code 61 winding, 'B' motor length, and provides a continuous torque at standstill of 8.0 Nm. This model is equipped with a DIN 6885-1 keyed shaft with seal, liquid-cooled housing, and turns up to 6000 min⁻¹. The integrated 5.0 Nm holding brake, digital servo feedback for relative position detection, and turnable power connection (270°) are included. The motor operates with a maximum setup height of 1000 m above MSL, complies with IP65 ingress protection, and has four pole pairs. Weight is 8.8 kg.

Technical Specifications

Motor Encoder
Digital Servo Feedback

Motor Frame Size
115mm Flange

Motor Winding
Factory assigned Code 61 type

Frame Length
8.0 Nm

Centering Diameter
95mm

Protection Degree
IP 65 specification

Cooling System
Natural Convection

Overload Protection
Real-time motor temperature monitoring

How does liquid cooling affect the performance of the MHD071B-061-NP1-UN in continuous-duty applications?

Liquid cooling maintains stable winding temperatures, allowing sustained torque output without thermal derating. This is especially beneficial in high-duty cycles or enclosed systems with limited airflow.

How does the holding brake torque impact vertical axis applications?

The 5.0 Nm holding brake ensures secure load retention when power is off. This is essential for vertical axes to prevent mechanical drop or drift.

What effect does the 8.8 kg mass have on mounting and dynamic system behavior?

The moderate weight simplifies handling during installation and reduces inertia in dynamic systems. It also enables tighter integration in lightweight machine designs.

Does the MHD071B-061-NP1-UN support precise homing routines in indexing systems?

Yes, its relative digital encoder supports fine-grained position tracking during motion cycles. For absolute positioning, external referencing at startup is typically required.

Can this motor be deployed above sea level without affecting thermal ratings?

It’s rated for operation up to 1000 meters above mean sea level. Beyond that, cooling efficiency and derating must be calculated due to thinner air density.

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Internal Product Review

The Bosch Rexroth Indramat MHD071B‑061‑NP1‑UN is a liquid‑cooled synchronous servo motor designed for precise automation. Its 4 pole pairs allow speeds up to 6000 min⁻¹, and includes a 5.0 Nm holding brake. This model finds use in CNC machines, packaging lines, robotics, and high‑precision motion systems in industrial automation.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MHD071B-061-NP1-UN.
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