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R911282575 (MHD112B-048-NP0-BN)

MHD Synchronous Motors

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The Bosch Rexroth R911282575 (MHD112B-048-NP0-BN) is a synchronous servo motor from the MHD series, featuring four pole pairs and a keyed shaft with shaft seal. It operates with a characteristic speed of 3500 min⁻¹, maximum speed of 4500 min⁻¹, and delivers a theoretical maximum torque of 102.0 Nm. Rated speed is 2800 min⁻¹ at 187 Hz, with a continuous standstill torque of 28.0 Nm. Electrical parameters include a torque constant of 0.88 Nm/A at 20°C, voltage constant of 80.0 V/1000min⁻¹ at 20°C, 0.22 Ω winding resistance, and 3.1 mH winding inductivity. The motor is liquid cooled, with digital servo feedback (HSF) and relative position detection. Housing is finished with black varnish, dimensions include a centering diameter of 130 mm, flange size of 192 mm, and a motor mass of 34.0 kg. It is built to protection class IP65 (DIN VDE 0530 Part 1), insulation class F, and operates in ambient temperatures from 0 to 40°C.

Technical Specifications

Product
Bosch Rexroth MHD Synchronous Servo Motor

Characteristic Motor Speed
3500min-1

Peak Current
160.0A

Torque Constant at 20C
0.88Nm/A

Voltage Constant at 20C
80.0V/1000min-1

Winding Resistance at 20C
0.22

Winding Inductivity
3.1mH

Pole Pairs
4

Rated Speed
2800

Rated Frequency
187Hz

Maximum Torque
102.0Nm

Maximum Speed
4500min-1

Motor Mass
34.0kg

Permissible Ambient Temperature
0 to 40

Insulation Class
F

Degree of Protection
IP65

Housing Varnish
Prime coat black in a/w RAL 9005

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Cary, NC 27513, USA

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