MDD025B-N-100-N2G-040FA1
MDD Synchronous Motors
The MDD025B-N-100-N2G-040FA1 is a motor for digital drive controllers from Bosch Rexroth Indramat’s MDD Synchronous Motors series. It delivers a continuous torque at standstill of 0.60 Nm and a holding brake torque of 1.0 Nm. Featuring resolver feedback, a plain shaft with a 40 mm centering diameter, it operates at 10000 min⁻¹. The standard housing, side A connector connection, standard balancing, and absence of a shaft seal make it versatile for varied applications.
Technical Specifications
Balancing
Standard
Holding Brake
With blocking brake
Holding Brake Torque
1.0 Nm
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 A
Connection Type
Connector
Product Type
Motor for digital drive controllers
Shaft End
Standard (without side B shaft end)
Frequently Asked Questions
How will the “continuous torque at standstill of ~0.60 Nm” affect holding loads in practice?
With 0.60 Nm available at zero speed, the motor can maintain moderate loads without slipping when powered, but any external torque exceeding that will require external brakes or gearing. For precision positioning under load, you’ll need mechanical reduction or ensure load torque stays under that threshold.
What are the implications of the 1.0 Nm holding (blocking) brake torque in dynamic applications?
The holding brake enables the motor to resist backlash or drift when de-energized or during power loss, useful for safety or rest positions. However, braking must be coordinated with the drive controller to avoid mechanical shock or overshoot when releasing or engaging the brake.
How does the “plain shaft” and 40 mm centering diameter affect coupling and mounting design?
A plain, centered shaft with a 40 mm diameter simplifies mechanical coupling with hubs, pulleys, gears, or couplings without needing special adapters. But tolerance on diameter and run-out (shaft alignment) becomes more critical to avoid vibrations or imbalance at high speed (10,000 min⁻¹).
What does “without shaft seal” mean for environmental protection and maintenance?
Lack of a shaft seal means the motor’s internal bearings and rotor are more exposed to contaminants (dust, moisture), making it less ideal for wet or dusty environments unless additional sealing is added. Regular inspection and lubrication may be required, depending on application, to maintain bearing life.
How does the nominal speed of 10,000 min⁻¹ influence cooling, bearing loading, and lifetime?
At 10,000 rpm, bearing fatigue, thermal rise, and vibration become significant; cooling (air flow or forced cooling) and precision balancing are essential to maintain performance and lifetime. Any imbalance or misalignment is amplified at high speed, so mounting rigidly and balancing to specification are key.
Common Misspellings
MDD-025B-N-100-N2G-040FA1
MDD025B N 100 N2G 040FA1
MDD025B-N-100-N2G-040-FA1
MDD025BN100N2G040FA1
MDD25B-N-100-N2G-040FA1
MDDO25B-N-100-N2G-040FA1
MDDO25B-N-1OO-N2G-O4OFA1
Internal Product Review
The Bosch Rexroth MDD025B-N-100-N2G-040FA1 is a precise digital AC servo motor designed for industrial automation. It features a nominal speed of 10,000 min⁻¹, resolver feedback, and a 1.0 Nm holding brake for secure positioning. Ideal for applications in robotics, CNC machinery, and packaging, this motor integrates easily with existing systems.
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