MDD025A-N-100-N2G-040FE0

MDD Synchronous Motors

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The MDD025A-N-100-N2G-040FE0 motor from Bosch Rexroth Indramat is part of the MDD Synchronous Motors series. It features standard balancing, is supplied without a blocking brake, offers a 40 mm centering diameter, and uses resolver feedback for precise position detection. This motor delivers a continuous torque at standstill of 0.33 Nm and runs at a nominal speed of 10000 min⁻¹. It connects via a left-oriented coupling cable and has a plain shaft design.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
40 mm

Housing
Standard

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.33 Nm

Motor Length Code
A

Motor Size
025

Nominal Speed
10000 min⁻¹

Shaft Seal
Without shaft seal

Shaft Type
Plain shaft

Connection Direction
Left

Connection Type
Connecting cable with coupling unit

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What is the significance of a 40 mm centering diameter in the MDD025A-N-100-N2G-040FE0 motor for mounting and coupling?

A 40 mm centering diameter helps ensure precise alignment with gearboxes or machine interfaces, reducing eccentric loads and vibration. Poor alignment could increase bearing wear or reduce motion accuracy in CNC or robotics setups.

How does resolver feedback affect accuracy and performance in this motor during high-speed operation?

Resolver feedback gives robust absolute position feedback even at 10,000 min⁻¹, enabling control systems to maintain synchronization and minimize positional drift. However, the resolution is lower than some high-precision encoders, so for ultra-fine positioning, additional feedback might be needed.

What are the implications of having no blocking (holding) brake in this motor for B2B industrial applications?

Without a holding brake, the motor depends on external mechanisms or the drive electronics to prevent unwanted motion during power loss or manual intervention. In applications like vertical axes or load holding this may require safety features or mechanical locking to meet safety/regulatory requirements.

How does continuous torque at standstill of 0.33 Nm influence the suitability for load-holding or starting heavy loads?

The 0.33 Nm of standstill torque allows the motor to hold modest static loads without movement but isn’t enough for heavy load lifting or resisting large external disturbances. For heavy inertia or external loads, a gearbox or external gear reduction may be needed to achieve sufficient torque.

What thermal considerations arise operating this motor at nominal speed (10,000 min⁻¹) over long durations?

High speed increases internal losses—especially in windings, bearings, and air friction—so efficient cooling (airflow or mounting on a heatsink) is important to avoid overheating. Continuous operation at full speed may require monitoring motor temperature or derating torque to maintain safe operating limits.

Common Misspellings

Internal Product Review

The MDD025A-N-100-N2G-040FE0 motor from Bosch Rexroth is designed for digital drive controllers in industries like robotics, electronics, and CNC machining. It comes with resolver feedback, a plain shaft, and no holding brake or shaft seal. The motor operates at 10000 rpm with 0.33 Nm continuous torque and connects via a left-side coupling unit.