R911281235 (MHD090B-035-PG1-UN)

MHD Synchronous Motors

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The Bosch Rexroth R911281235 (MHD090B-035-PG1-UN) is a synchronous servo motor equipped with a plain shaft and shaft seal, featuring liquid, surface, or natural cooling options. It delivers a continuous torque at standstill of 12.0 Nm and a maximum torque of 43.5 Nm, with a rotor moment of inertia of 43.0 x 10⁻⁴ kg·m². Rated current is 4.7–6.7 A (natural cooling) and 9.7 A (surface cooling), with power output up to 5.9 kW and rated voltage of 354–399 V at 200 Hz. The motor incorporates a digital absolute encoder capable of position detection beyond 4096 revolutions. The holding brake torque is 11.0 Nm. Its maximum speed is 5000 min⁻¹, and it has an IP65 protection rating. The unit has a motor length “B,” flange size of 140 mm, centering diameter of 110 mm, and total mass of 14 kg. It is classified under insulation class F according to DIN VDE 0530 Part 1 and is suitable for ambient temperatures from -20°C to +80°C. Connections for power and feedback are provided via connectors that are turnable within a 270° range.

Technical Specifications

Cooling System Types
Natural, Surface, Liquid

Rated Current (Natural Cooling)
4.7A to 6.7A

Rated Current (Surface Cooling)
9.7A

Rated Performance (Natural Cooling)
2.8Kw to 4.0Kw

Rated Performance (Surface Cooling)
5.9Kw

Rated Voltage (Surface Cooling)
399V

Rated Voltage (Natural Cooling)
354V to 369V

Rated Frequency
200Hz

Theoretical Maximum Torque
43.5Nm

Moment of Inertia of Rotor
43.0 x 10-4 kgm2

Minimum Strand Cross-section (Surface & Natural Cooling)
1.0 mm2

Time Constant (Natural Cooling)
60 min

Time Constant (Surface Cooling)
30 min

Maximum Speed
5000 min-1

Mass
14kgs

Storage Temperature Range
-20 to +80°C

Ambient Temperature Range
0 to 40°C

Maximum Permissible Attitude
1000 meters above sea level

Degree of Protection
IP65

Insulation Class
F (DIN VDE 0530 Part 1)

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The MHD090B-035-PG1-UN servo motor by Bosch Rexroth Indramat outputs 12.0 Nm continuous torque and carries an 11.0 Nm holding brake. It features a 270° rotatable connector and plain shaft of 140 mm flange / 110 mm centering. It finds use in CNC machining centres, automated assembly lines, and robotics where precise multi-turn positioning is critical.

1620 Old Apex Road
Cary, NC 27513, USA

Toll Free: 1-888-551-3082
International: 1-919-443-0207

Fax: 1-919-867-6204

[email protected]

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Indramat USA 1 Year Warranty

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Indramat USA
1620 Old Apex Road
Cary, NC 27513
USA

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Toll Free: 1-888-551-3082
International: 1-919-443-0207

Indramat USA sells factory new and pre-owned surplus products and maintains channels to procure supply. Indramat USA is not affiliated with nor an authorized distributor or representative of any manufacturers, brands or products listed. Designated trademarks, brand names, and brands appearing herein are the property of their respective owners.