MDD025A-N-100-N2K-040PR0

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040PR0 is a Motor for digital drive controllers by Bosch Rexroth Indramat, part of the MDD Synchronous Motors series. It delivers 0.33 Nm continuous torque at standstill and operates at 10000 min⁻¹. Featuring an integrated absolute encoder with resolver feedback, a 40 mm centering diameter, shaft seal, keyway shaft per DIN 6885, and right connector connection.

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
With shaft seal

Shaft Type
keyway

Connection Direction
Right

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 does the integrated absolute encoder plus resolver feedback improve control accuracy?

The resolver gives fast coarse angular data while the absolute encoder provides precise position information even after power loss, enabling accurate homing without repositioning. Together they reduce error accumulation, improve trajectory following, and allow for closed-loop control even under dynamic loads.

In what cases would the shaft seal (with shaft seal) be critical, and what are its trade-offs?

A shaft seal is essential if the motor is exposed to dust, splash, or coolant to prevent ingress and protect internal components; useful in wash-down or splash-prone industrial settings. However, seals add friction, potentially slightly reduce efficiency at high speed and require seal material compatibility (temperature, chemicals).

How does operating without a blocking or holding brake affect system safety and motion control?

Without a brake, in absence of power or during sudden stops, the motor cannot hold load, so external braking or mechanical locks must be provided especially in vertical or safety-critical systems. Control systems must also include fault detection or safe shutdown modes to avoid runaway.

What are the electrical implications of the “connector” connection type and “right” connection direction?

The connector orientation (right-side) constrains routing of wires; in compact assemblies may require longer cables or tight bends, so ensure flexibility and strain relief. Also, connector style influences protection against ingress (IP rating), electrical shielding, and compatibility with drive controllers.

How does “standard balancing” influence vibration, lifetime, and suitability for high‐speed applications?

Standard balancing means the rotor is balanced within normal tolerances sufficient for nominal speeds, but not optimized for extreme high-speed (>10,000 min⁻¹) or precision spindle use. Excess imbalance leads to vibration, bearing wear, and noise; for ultra-quiet or ultra-precise systems one may require “high precision balancing”.

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Internal Product Review

The MDD025A-N-100-N2K-040PR0 motor from Bosch Rexroth Indramat offers a continuous torque of 0.33 Nm and a rated speed of 10,000 min⁻¹. It includes an integrated absolute encoder and resolver feedback for accurate control. This motor, with a keyway shaft and 40 mm centering diameter, is suitable for robotics and industrial automation applications.