MDD025A-N-100-N2G-040FR0

MDD Synchronous Motors

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The MDD025A-N-100-N2G-040FR0 motor from Bosch Rexroth Indramat's MDD Synchronous Motors series is designed for digital drive controllers. It delivers a continuous torque at standstill of 0.33 Nm, offers a nominal speed of 10000 min⁻¹, features resolver motor feedback, and provides a centering diameter of 40 mm. The housing and balancing are standard, and it uses a connector connection type. The motor comes without a holding brake or shaft seal.

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
Right

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

How does the continuous torque at standstill (0.33 Nm) affect the motor’s ability to handle load inertia and acceleration?

A standstill torque of 0.33 Nm means the motor can resist or start loads without slipping under that torque, but accelerating larger inertia will require higher peak torques above that. The torque-to-inertia ratio and drive current capability become critical when demanding fast start-stop or high dynamic motion.

What are the installation considerations with a plain shaft and no shaft seal?

A plain shaft with no seal requires careful protection against contamination (dust, moisture) especially where ingress may damage bearings or coupling interfaces; shaft coupling alignment is more critical. For hostile environments, additional sealing or using protective boots or covers may be needed to maintain reliability.

How does the centering diameter of 40 mm affect integration into mechanical assemblies and coupling selection?

A 40 mm centering diameter defines the interface for mounting flanges or couplings; mis-match here can introduce eccentricity leading to vibration or uneven load on bearings. Proper matching and concentricity tolerance are essential to avoid introducing mechanical imbalance, especially at high speed.

What are the performance trade-offs of standard balancing instead of high-precision or special balancing?

Standard balancing is good for general use but may allow more vibration at high speed compared to high-precision balancing, which reduces rotor imbalance and associated fatigue. The trade-off is cost vs. vibration amplitude; in robotics or semiconductor tools where vibration tolerance is tight, spec’ing higher balancing may be justified.

Can this motor deliver sufficient torque at higher speeds for sealing or cutting tools, given the 0.33 Nm standstill torque?

While standstill torque is useful for initial holding or full-stop tasks, torque available at higher speeds typically drops due to back-EMF and thermal limits. For operations like cutting or sealing, you must check the motor’s torque vs speed curve; if required torque at speed is above available output, you either need gearing or a higher-torque motor.

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Internal Product Review

The MDD025A-N-100-N2G-040FR0 motor by Bosch Rexroth delivers 0.33 Nm continuous torque with a nominal speed of 10,000 min⁻¹. It features resolver feedback, a plain shaft, and a 40 mm centering diameter, suited for integration with digital drive controllers. This motor is commonly used in semiconductor equipment, robotics, and automated packaging systems.