MDD025A-N-100-N2K-040ML0

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040ML0 servo motor from Bosch Rexroth Indramat is in the MDD Synchronous Motors series. It features a motor size of 025, a length code A, a centering diameter of 40 mm and a continuous torque at standstill of 0.33 Nm. The motor achieves a nominal speed of 10000 min⁻¹ with resolver feedback and an integrated absolute encoder for precision. It comes without a blocking brake and uses a shaft with keyway per DIN 6885 sh. 1.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
40 mm

Housing
Standard

Encoder
Integrated absolute encoder

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
keyway

Connection Direction
Left

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Output Shaft
Shaft With Keyway Per DIN 6885 sh. 1, 8-68 Edition

Frequently Asked Questions

How do the integrated absolute encoder + resolver feedback benefit closed-loop control accuracy and reliability?

The resolver provides robust rotor position feedback even under electrical noise or high temperature, while the absolute encoder ensures position is known immediately after power-up without homing. Together they improve precision, reduce startup downtime, and increase resilience in demanding environments.

How does the 40 mm centering diameter + keyway shaft influence mounting alignment and torque transmission?

The centering diameter ensures concentric mounting to reduce misalignment, critical for performance and bearing life; the keyway shaft allows positive torque transfer but introduces stress concentrations that require correct key sizing and fit. Misaligned key or loose fit can cause backlash, wear, or vibration.

What are the implications of no holding (blocking) brake on safety and positioning when power is off?

Without a blocking brake, the motor cannot mechanically hold the load in place when unpowered, so external brakes or locks are needed to prevent drift in safety-critical or vertical axis applications. Also, backup power or failsafe systems become more important.

Can the “MDD025A-N-100-N2K-040ML0 Bosch Rexroth” be paired directly with off-the-shelf CNC drives, or are special drive requirements needed for its resolver + encoder system?

It may not be plug-and-play with generic drives; you must ensure the drive supports the specific resolver type and absolute encoder protocol used, matching voltage, wiring and interpolation. Also, make sure the drive’s current rating and peak power margins accommodate the motor’s continuous and transient torque demands.

For B2B applications like robotics or packaging automation, how does this motor’s feedback combination and nominal speed yield benefits in throughput and repeatability?

The fast response from high speed (10,000 min⁻¹) plus immediate, accurate position feedback (absolute + resolver) mean less delay in motion changes and minimal cumulative error. This leads to higher cycle rates and tighter precision, reducing rejects or secondary corrections in production.

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Internal Product Review

The Bosch Rexroth MDD025A-N-100-N2K-040ML0 motor offers 0.33 Nm torque at standstill, a nominal speed of 10,000 min⁻¹, and an integrated absolute encoder with resolver feedback. Its standard housing, 40 mm centering diameter, and keyway shaft ensure reliable integration. This motor finds use in robotics, CNC machining, and packaging automation.