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R911280471 (MHD090B-035-NP1-UN)

MHD Synchronous Motors

Rated 4.3 stars (9 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 R911280471 (MHD090B-035-NP1-UN) servo motor from Bosch features a 140 mm flange, 090 motor size, and 12.0 Nm continuous torque at standstill. It utilizes digital servo feedback (HSF) for relative position detection, including a keyed shaft that complies with DIN 6885-1 and incorporates a sealing ring. This model supports a characteristic speed of 2500 RPM and a maximum speed of 5000 RPM, with a maximum current of 49.5 A. Four pole pairs are incorporated. At 60K, it operates at 3000 RPM with 7.2 Nm torque, 4.7 A, and 2.8 kW; at 100K, it achieves 10.2 Nm, 6.7 A, and 4.0 kW output. The unit is supplied with an 11 Nm holding brake, has a liquid-cooled surface housing, an electrical power connector adjustable through 270°, and is designed for installation up to 1000 m altitude. The motor weight is 14 kg.

Technical Specifications

Motor Size
090 (140mm Flange Size, 110mm Centering Diameter)

Flame Length
B (12.0 Nm continuous torque at standstill)

Encoder type
Digital Servo Feedback

Shaft connection
Shaft with key per DIN 6885-1

Maximum Speed
5000 RPM

Peak Current Rating
49.5 Amps

Pole Pairs
4

Rated Speed (60K)
3000 RPM

Rated Torque (60K)
7.2 Nm

Rated Current (60K)
4.7 Amps

Rated Power Output (60K)
2.8 kW

Rated Voltage (60K)
354 Volts

Rated Line Frequency (60K)
200 Hz

Rated Speed (100K)
3000 RPM

Rated Torque (100K)
10.2 Nm

Rated Current (100K)
6.7 Amps

Rated Power Output (100K)
4.0 kW

Rated Voltage (100K)
369 Volts

Rated Line Frequency (100K)
200 Hz

Rotor Inertia
43.0 x 10-4 kg m2

Theoretical Maximum Torque
43.5 Nm

Motor Weight
14 Kg

Maximum Installation Altitude
1000 meters

Holding Brake
11 Nm

Cooling System
Surface Cooled

Connector Rotation
270 Degrees

How does the 11.0 Nm holding brake torque affect vertical applications?

It securely holds loads in position when the drive is inactive, preventing unwanted motion due to gravity. This is especially critical in Z-axis or lift systems.

What are the integration benefits of the 140 mm flange and 110 mm centering diameter?

These standardized dimensions enable drop-in replacement in IEC-compatible systems. They also simplify alignment during installation and reduce machining requirements.

Why is digital servo feedback (HSF) advantageous for positioning control?

HSF provides high-resolution position data for precise motion control and tighter loop regulation. This improves accuracy and responsiveness in automation tasks.

Can the MHD090B-035-NP1-UN run continuously without external fans?

Yes, the liquid cooling negates the need for external air circulation, even under high-load conditions. This is ideal for sealed or thermally sensitive environments.

What role does the relative position detection play in system reliability?

Relative encoders track movement from a known reference but require homing at startup. They are simpler and more cost-effective but less suitable where absolute position retention is critical.

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Internal Product Review

The MHD090B‑035‑NP1‑UN is a synchronous servo motor from Bosch Rexroth Indramat. It delivers 12.0 Nm continuous torque at standstill, 11.0 Nm holding brake torque, includes a keyed shaft with sealing ring, and offers a 270° turnable power connector. Its housing is liquid‑cooled, aiding heat dissipation and thermal control.

Warranty

1-year-warranty
Indramat USA 1 Year Warranty

Repair

product repair We offer a repair service for the MHD090B-035-NP1-UN.
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