MDD025B-N-100-N2G-040FD0

MDD Synchronous Motors

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MDD025B-N-100-N2G-040FD0 is a size 025 synchronous motor with a nominal speed of 10000 min⁻¹. Manufactured by Bosch Rexroth Indramat in the MDD Synchronous Motors series, it delivers 0.60 Nm torque and features resolver feedback. It has a 40 mm centering diameter, plain shaft and connecting cable with coupling unit.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
40 mm

Housing
Standard

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.60 Nm

Motor Length Code
B

Motor Size
025

Nominal Speed
10000 min⁻¹

Shaft Seal
Without shaft seal

Shaft Type
Plain shaft

Connection Direction
Side B

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

How does selection of a motor variant with blocking brake or shaft sealing change the performance or parameters relative to Bosch Rexroth’s MDD025 base model?

Adding a blocking brake introduces extra inertia, slightly reduces continuous torque, and lengthens the motor assembly, while shaft sealing increases environmental protection (IP rating) but may lower continuous torque or heat dissipation, thus possibly requiring derating at high ambient temperatures or speeds.

What are the limitations on radial and axial shaft loads for this size (025) motor in high-speed applications?

While exact numbers depend on distance from bearing and speed, MDD series data shows that radial loads increase wear rapidly at high rpm (“bearing life drops” with increased radial force) and axial loads are more limited; loads should be within specified Fradial and Faxial curves in the datasheet for reliable lifetime.

What drive/controller considerations (e.g. digital drive) are needed to fully utilize this synchronous motor?

A drive capable of sinusoidal current control and supporting resolver feedback is required to exploit smooth torque, precise speed, and minimal ripple; the controller must handle speed up to 10,000 rpm and provide appropriate current limits, cooling monitoring, and thermal protection.

How does centering diameter (40 mm in this motor) influence mechanical integration and alignment?

The 40 mm centering diameter defines the pilot surface for alignment; it ensures minimal misalignment of the shaft and housing when mounting, lowering vibration and extending bearing life especially at high rpm. It also determines the size of mating parts and mounting precision required.

How significant is the motor’s shaft type (“plain shaft”) for coupling and load transmission?

A plain shaft (without special flanges or side-B extensions) allows direct mounting of pulleys or clamping hubs, which reduces backlash and improves rigidity; however, it may limit torque transfer for high radial or axial loads unless correctly supported

Common Misspellings

Internal Product Review

The Bosch Rexroth MDD025B-N-100-N2G-040FD0 motor is designed for digital drive controllers. It features a 10,000 min⁻¹ of operating speed and 0.60 Nm of continuous torque that makes it suitable for applications like automation and robotics. The motor uses resolver feedback and a plain shaft for precise control and reliable operation.