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R911289059 (MHD112D-027-NP3-LN)

MHD Synchronous Motors

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The MPN R911289059 (MHD112D-027-NP3-LN) is a synchronous servo motor engineered by Bosch Rexroth for industrial automation tasks. This unit features dual cooling options—natural and surface—and an IP68-rated housing with black coating for environmental resistance. The motor delivers a rated torque of 41.5 Nm using natural cooling at 100K, operating at 20.7 A and 331 V. Key technical properties include a keyed shaft with a sealing ring, a left-oriented power connector, winding resistance of 0.35 Ω, and a torque constant of 1.7 Nm/A at 20°C. It is equipped with a 70 Nm holding brake, centering diameter of 130 mm, 192 mm flange, and a 56 kg weight. The encoder is digital servo feedback (HSF), with relative position detection, and the motor is specified for operation from 0 to +40°C and altitudes up to 1000 m. The voltage constant is 154.5 V/min-1 and the rotor moment of inertia is 350 x 10^-4 kgm².

Technical Specifications

Motor Type
Synchronous

Housing Design
Natural and Surface Cooling

Protection Rating
IP68

Housing color
Black

Rated Torque (100K, natural cooling)
41.5 Nm

Rated Voltage
331V

Rated Current
20.7 A

Output Shaft
Key with Sealing Ring

Power connection
Left Side

Winding Resistance
0.35 ohms

Torque Constant (20C)
1.7 Nm/A

Holding Brake Weight
3.8 kilograms

Inertia
30 x 10-4 kgm2

Brake Holding Torque
70 Nm

Brake Rated Current
1.29 A

Brake Rated Voltage
24V

Weight
56 KG (without attachments)

Servo Feedback Type
Digital

Operating Temperature Range
0-40 degree centigrade

Maximum Installation Height
1000 metres above sea level

Voltage Constant
154.5 V/min-1

Motor Inertia
350 x 10-4 kgm2.

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1620 Old Apex Road
Cary, NC 27513, USA

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Indramat USA
1620 Old Apex Road
Cary, NC 27513
USA

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Toll Free: 1-888-551-3082
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