MHD071B-061-PP2-UN/SA003
MHD Synchronous Motors
The MHD071B-061-PP2-UN/SA003 is a servo motor from Bosch Rexroth Indramat in the MHD Synchronous Motors series. It converts electrical power into regulated rotary motion for automated handling, packaging, and metal-working axes that require closed-loop accuracy. The model integrates smoothly with Rexroth digital drive controllers.
At a characteristic speed of 4500 rpm the motor reaches rated output, while continuous standstill torque of 8.0 Nm holds the load. The electromagnetic design provides a torque constant of 0.77 Nm/A, enabling controllers to derive torque from phase current. Peak demand is met by a limit of 50.5 A, and back-EMF appears at 70.0 V/1000 rpm, figures used when choosing the DC bus. Four pole pairs align the rotor, and winding code 061 sets 7.2 mH inductance with 1.45 Ω resistance. Power enters through rotatable connectors set within 270°, and the minimum conductor section is 1.0 mm². A 115 mm flange with a 95 mm pilot suits size 071 hardware, and the unit uses the intermediate length B.
Environmental and mechanical features complete the profile. The housing is rated IP65, and heat leaves via Liquid cooling, letting the 8.8 kg frame run high duty cycles. Rotor inertia of 8.7e-4 kg·m² yields quick speed changes without overshoot. A holding brake producing 6.5 Nm secures axes when power is off, supported by a keyed shaft and a shaft seal. Digital servo feedback with an absolute encoder covers more than 4096 revolutions. The design also provides a theoretical peak torque of 32 Nm, and connectors shared by power and feedback can be rotated to match cabinet wiring.
Technical Specifications
Centering diameter
95 mm
Characteristic Motor Speed
4500 rpm
Continuous Torque at Standstill
8.0 Nm
Degree Of Protection
IP65
Encoder Type
Digital servo feedback w/ integrated encoder
Flange size
115 mm
Holding Brake
With holding brake
Holding Brake Torque
6.5 Nm
Housing Cooling Type
Liquid cooling
Min. Conductor Cross-section
1.0 mm²
Motor Length
B
Motor Mass
8.8 kg
Motor Size
071
Peak Current
50.5 A
Pole Pairs
4
Power Connection Direction
turnable within a range of 270°
Power Connection Type
Power and feedback connectors
Product Type
Servo Motor
Rotor Inertia
8.7e-4 kgm²
Shaft Design
Keyed Shaft
Shaft Seal
Yes
Theoretical Maximum Torque
32.0 Nm
Torque Constant (20°c)
0.77 Nm/A
Type of Position Detection
Absolute (>4096 revolutions)
Voltage Constant (20°c)
70.0 V/1000 rpm
Winding Code
061
Winding Inductance
7.2 mH
Winding Resistance (20°c)
1.45 Ω
Frequently Asked Questions
Internal Product Review
The MHD071B-061-PP2-UN/SA003 from Bosch Rexroth Indramat is a high-performance synchronous servo motor featuring a maximum speed of 4500 rpm and continuous torque at standstill of 8.0 Nm. With IP65 protection and liquid cooling, this unit is well-suited for demanding environments. The integrated digital servo feedback and holding brake enhance precision and safety, making this motor ideal for precision automation tasks.
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