MDD021A-N-100-N2G-032MB0
MDD Synchronous Motors
The Bosch Rexroth Indramat MDD021A-N-100-N2G-032MB0 from the MDD Synchronous Motors series is a high-precision motor for digital drive controllers designed for demanding industrial applications. Featuring a motor size of 021 with a centering diameter of 32 mm and a motor length code of A, it delivers a continuous torque at standstill of 0.15 Nm. Equipped with resolver feedback for accurate position control and a keyway shaft type with a standard shaft end, it operates at a nominal speed of 10000 min⁻¹. The motor is provided without blocking brake and without shaft seal, with a side B connection via connector for streamlined installation.
Technical Specifications
Balancing
Standard
Holding Brake
Without blocking brake
Centering Diameter
32 mm
Housing
Standard
Motor Feedback
Resolver feedback
Continuous Torque at Standstill
0.15 Nm
Motor Length Code
A
Motor Size
021
Nominal Speed
10000 min⁻¹
Shaft Seal
Without shaft seal
Shaft Type
keyway
Connection Direction
Side B
Connection Type
Connector
Product Type
Motor for digital drive controllers
Shaft End
Standard (without side B shaft end)
Frequently Asked Questions
What is the significance of “resolver feedback” in this motor and how does it affect closed-loop control stability?
Resolver feedback provides an analog rotary position measurement which is robust to harsh environments (temperature, EMI), allowing smooth commutation at high speed, but it limits position resolution compared to high-end digital encoders, so tuning of drive gains must account for its feedback latency and noise.
How does the continuous torque at standstill (0.15 Nm) impact the sizing of drives and mechanical load inertia?
Since torque at zero speed determines how large a load you can hold or start from rest without slipping, the motor drive must be rated to deliver that torque continuously and the mechanical system inertia should be minimized so that dynamic response is acceptable and overheating is avoided
What mechanical alignment or mounting concerns does the “keyway shaft” present in precision applications?
A keyway shaft reduces torsional backlash and simplifies coupling to gears, belts or pulleys, but misalignment between mating components or improperly sized keys can introduce vibration, wear, or premature failure; precision mounting and alignment tools are required.
How does the high nominal speed (10,000 min⁻¹) affect cooling requirements and thermal limits?
High speeds generate greater losses in bearings, windings, and air drag; without a shaft seal and standard housing, airflow must be sufficient and ambient temperature controlled to avoid exceeding thermal time constant limits and derating torque.
How does the centering diameter of 32 mm play into coupling, bearing loads, and rigidity?
A 32 mm centering diameter helps with precise alignment and reduces radial offset; this improves stiffness and reduces side loads on bearings, leading to higher life and more accurate performance, especially in applications with off-axis loads.
Common Misspellings
MDD-021A-N-100-N2G-032MB0
MDD021A N 100 N2G 032MB0
MDD021A-N-100-N2G-032-MB0
MDD021A-N-100-N2G-032-MBO
MDD021A-N-100-N2G-032MBO
MDD021AN100N2G032MB0
MDD21A-N-100-N2G-032MB0
MDDO21A-N-100-N2G-032MB0
MDDO21A-N-1OO-N2G-O32MBO
Internal Product Review
The MDD021A-N-100-N2G-032MB0 motor from Bosch Rexroth features a nominal speed of 10,000 min⁻¹ and 0.15 Nm continuous standstill torque. It includes resolver feedback, a keyway shaft, and a 32 mm centering diameter, making it suitable for digital drive controllers. This motor is commonly used in robotics, electronics assembly, and semiconductor equipment.
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