R911279779 (MHD041B-144-NG1-UN)

Name: R911279779 (MHD041B-144-NG1-UN)
Brand: Indramat Motors
SKU: MHD041B-144-NG1-UN
Price: 796.00 USD
Availability: InStock
Rating: 4.4 (6 reviews)

MHD Synchronous Motors

Rated 4.4 stars (6 total reviews)

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Phone:
1-888-551-3082

Email:
sales@indramat-usa.com

The Bosch Rexroth Indramat synchronous motor R911279779 (MHD041B-144-NG1-UN) is a brushless servo motor designed for industrial automation tasks, with a naturally-cooled housing and convection air cooling. It features a rated torque of either 1.4 Nm or 1.5 Nm, rated speeds of 3,000 RPM and 4,500 RPM, and corresponding power ratings of 0.52 kW and 0.88 kW, depending on the variant. The motor has a plain shaft with a shaft seal, a 2.2 Nm holding brake, digital servo feedback (HSF) for relative position detection, and supports turnable power connectors up to 270°. It is sized with an 82 mm flange, 50 mm centering diameter, and weighs 4.5 kg. The unit has an IP65 protection rating and uses winding code 144.

Technical Specifications

Type
Synchronous Motors

Design
Maintenance-Free Brushless

Overtemperature Setting Variants
60K, 100K

Rated Torque (60K)
1.4Nm

Rated Torque (100K)
1.5Nm

Rated Speed (60K)
3,000 RPM

Rated Speed (100K)
4,500 RPM

Rated Performance (60K)
0.52kW

Rated Performance (100K)
0.88kW

Cooling System
Naturally Cooled, Convective Air

Degree of Protection
IP65

Motor Mass
4.5 kg

Holding Brake
2.2 Nm

Digital Servo Feedback Device
Included

Reliability
High

Address for Global Shipping
Available from Indramat USA.

Frequently Asked Questions

What installation benefit does the 270° turnable power connection provide?

It allows cable routing flexibility in tight spaces, reducing stress on connectors and easing integration into compact machine layouts. This minimizes the risk of cable fatigue during long-term use.

How does liquid cooling affect the performance of this servo motor?

Liquid cooling enables higher continuous torque output without overheating compared to air-cooled motors. It also allows stable operation in environments with limited airflow.

Does the MHD041B-144-NG1-UN require an external brake resistor for holding torque?

No, it includes an integrated 2.2 Nm holding brake designed to secure loads when powered down. External brake resistors may only be needed for dynamic braking under high deceleration.

How does digital servo feedback (HSF) improve system accuracy?

It provides precise relative position signals for the drive, ensuring smoother motion control and tighter synchronization. This is particularly critical in CNC or robotic applications.

What alignment precautions are needed when installing the MHD041B-144-NG1-UN on a machine?

The 50 mm centering diameter and 82 mm flange must align correctly to avoid shaft misalignment. Incorrect mounting can cause vibration, bearing wear, or premature failure.

Common Misspellings

MHD 041B 144 NG1 UN

MHD 041B-144-NG1-UN

MHD-041B-144-NG1-UN

MHD041B144NG1UN

MHD04IB-I44-NGI-UN

MHDO41B-144-NG1-UN

MHD041B 144 NG1 UN

mhd041b-144-ng1-un

MHD41B-144-NG1-UN

Internal Product Review

The MHD041B-144-NG1-UN is a synchronous servo motor from Bosch Rexroth’s Indramat MHD line. It features liquid-cooled housing, a built-in 2.2 Nm holding brake, digital servo feedback with an 82 mm flange. It finds use in robotic arms, packaging machinery, and machining centers for precise motion and positioning tasks.