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R911294134 (MHD071B-061-PG2-UN)

MHD Synchronous Motors

Rated 4.2 stars (10 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
The synchronous servo motor R911294134 (MHD071B-061-PG2-UN) from the Bosch Rexroth Indramat MHD series is engineered for precise automation applications. It features a digital servo feedback system with an integrated encoder for absolute position detection exceeding 4096 revolutions. The motor utilizes permanent magnets with electronic commutation and offers a continuous standstill torque of 8.0 Nm. Key specifications include a 071 motor frame size, B-length, 95 mm centering diameter, 115 mm flange size, and a plain shaft with sealing. The unit is equipped with a 6.5 Nm holding brake and liquid-cooled housing. Power connections are turnable within 270°, with a combined power and feedback connector.

Technical Specifications

Feedback System
Digital Servo Feedback Motor Encoder

Design
Permanent-magnets with electronic commutation

Motor Frame Size
71

Frame Length
B type (factory assigned)

Centering Diameter
95mm

Windings
61 (factory assigned)

Shaft
Plain and sealed by sealing ring

Shaft Key-Way
DIN 6885-1 with shaft sealing ring

Holding Brake
70 Nm

Ball Bearings
Self greasing and long life

Cooling System
Convection

Why is a plain shaft used instead of a keyed one in the MHD071B-061-PG2-UN?

Plain shafts are suited for applications requiring smooth, backlash-free coupling. They're commonly used with clamp-style couplers in precision systems.

How does absolute position feedback (>4096 revs) benefit multi-turn applications?

It ensures accurate position tracking even after power loss, without needing a homing routine. This reduces cycle time and error risk in automated sequences.

Can the MHD071B-061-PG2-UN be mounted in sealed enclosures?

Yes, thanks to liquid cooling and sealed IP65 housing, it's well-suited for thermally isolated or dirty environments. It keeps internal temperatures in check without external airflow.

Is the motor’s torque performance affected by mounting orientation?

No, the torque output remains consistent regardless of mounting position. The liquid cooling system helps manage heat buildup in any orientation.

Why is the encoder integrated with digital servo feedback in this motor?

Integration minimizes wiring and improves signal accuracy for closed-loop control. It streamlines installation and enhances motion system response.

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Internal Product Review

The MHD071B‑061‑PG2‑UN is a servo motor in the Bosch Rexroth Indramat MHD synchronous series. It integrates liquid cooling, digital servo feedback with an absolute encoder and delivers 8.0 Nm continuous torque. Its housing comes with a varnished enclosure rated to IP65 with built‑in sealing and thermal protection.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MHD071B-061-PG2-UN.
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