MDD021B-N-100-N2K-032FB0

MDD Synchronous Motors

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The Bosch Rexroth Indramat MDD021B-N-100-N2K-032FB0 belongs to the MDD Synchronous Motors series and is a motor for digital drive controllers. It provides 0.30 Nm continuous torque at standstill and a nominal speed of 10000 min-1. The motor has a plain shaft and uses a side B connector for its connection.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
32 mm

Housing
Standard

Encoder
Integrated absolute encoder

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.30 Nm

Motor Length Code
B

Motor Size
021

Nominal Speed
10000 min⁻¹

Shaft Seal
Without shaft seal

Shaft Type
Plain shaft

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 challenges does a plain shaft with no shaft seal present in dusty or humid environments?

Without a seal, contaminants can more easily enter the bearing or damage shaft surfaces, reducing lifespan; you may need external sealing or protective covers. Also, maintenance schedules will need to include inspections of shaft wear or corrosion especially in corrosive atmospheres.

At 10,000 min⁻¹ nominal speed, how critical is rotor balancing with only “standard” balancing?

Standard balancing will reduce vibration for many applications, but at high rpm even small imbalances can cause significant bearing loads or resonance. For precision or long-life installations, dynamic balancing or upgraded balancing might be needed to avoid thermal run-up or mechanical fatigue.

How does the continuous torque at standstill of 0.30 Nm limit application in startup or holding moments?

It defines the holding or static load you can sustain without slipping when the motor is not rotating; anything heavier or with moments that exceed this torque may require external brakes or gearing. During acceleration, peak torque might be higher, but if static load exceeds 0.30 Nm, you risk drift or inability to hold position.

What installation considerations come from the “side B” connector direction?

Side-B connection means the electrical connector is oriented at the side in a specific direction; you must allow space for cable routing, strain relief, and possible access for maintenance. Controller and drive placement need to account for that to avoid bending or stressing the connector under motion or vibration.

In applications involving rapid speed changes, what limitations are expected from the resolver feedback path?

Resolvers are robust but their effective bandwidth is constrained by resolver-to-digital conversion and possibly the carrier frequency; steep acceleration demands may expose lag in feedback signal processing. Filter tuning and compensation in the drive are essential to avoid control instability or overshoot.

Common Misspellings

Internal Product Review

The MDD021B-N-100-N2K-032FB0 motor from Bosch Rexroth is designed for digital drive controllers with a nominal speed of 10,000 min⁻¹ and a continuous standstill torque of 0.30 Nm. It includes a plain shaft, resolver feedback, and an integrated absolute encoder, making it technically efficient for precise motion control. This motor is commonly used in robotics, semiconductor manufacturing, and automated packaging industries.