MDD025A-N-100-N2K-040PF0

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040PF0 from Bosch Rexroth Indramat features a motor size of 025 and a nominal speed of 10000 min⁻¹. Part of the MDD Synchronous Motors, it provides a continuous torque at standstill of 0.33 Nm and offers an integrated absolute encoder. This motor includes a resolver feedback system and comes standard with shaft seal and standard housing.

It is designed without blocking brake and has a centering diameter of 40 mm and a keyway shaft type. The connection direction is right with a connecting cable coupling unit. Designed for digital drive controllers, it balances standard for reliable operation.

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
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 the “nominal speed” of 10,000 min⁻¹ affect thermal design and cooling requirements?

Running at 10,000 rpm generates significant friction and core losses, raising temperature especially in bearings and windings; proper cooling (forced air, fan, or ambient airflow) and thermal management are essential. Also, continuous operation near nominal speed will demand high-quality sealing (which this motor has) to protect bearings and maintain insulation integrity.

Why does integrating both an absolute encoder and resolver feedback benefit industrial motion control?

The absolute encoder preserves exact position on power loss, eliminating lengthy homing cycles; the resolver offers ruggedness and analog feedback under harsh conditions (vibration, temperature, EMI). Having both gives flexibility: precise digital position and robust analog fallback or complementary signal for commutation.

How does the shaft seal influence reliability and maintenance overhead?

The presence of a shaft seal reduces ingress of dust, moisture, and contaminants, which helps protect bearings and internal components, thereby increasing MTBF (mean time between failures). However, seals also introduce friction and may require occasional replacement; the sealing effectiveness depends on the operating environment.

In what way does the keyway shaft type with centering diameter of 40 mm impact mechanical integration?

The keyway allows positive torque transmission without slipping in shaft couplings or gearboxes, but it introduces stress concentrators; shaft alignment and coupling key design (size, material) must accommodate torque without inducing shaft fatigue. The 40 mm centering diameter standardizes mounting interfaces, easing mechanical alignment and interchangeability

What implications does “without blocking brake” have for use in positioning or safety‐critical applications?

No internal brake means the motor cannot hold position mechanically when power is lost; external brakes or mechanical locks are needed if load must not drop under fault or during shutdowns. For vertical applications or any gravity‐load scenario, you’ll need supplementary braking or clamping to ensure safety.

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Internal Product Review

The MDD025A-N-100-N2K-040PF0 is a digital servo motor from Bosch Rexroth. It features a nominal speed of 10,000 min⁻¹ and continuous standstill torque of 0.33 Nm. This motor is suitable for industries like robotics, packaging, and material handling, offering precise motion control with integrated encoder and resolver feedback.