MDD025B-N-100-N2G-040FB1

MDD Synchronous Motors

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The MDD025B-N-100-N2G-040FB1 is a motor for digital drive controllers by Bosch Rexroth Indramat in the MDD Synchronous Motors series. It delivers 0.60 Nm continuous torque at standstill and reaches 10000 min⁻¹ nominal speed, featuring resolver feedback. Equipped with a 1.0 Nm blocking brake, 40 mm centering diameter, plain shaft, connector side B and no shaft seal, it maintains standard housing balance.

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 B

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

How does the connection side (“Side B”) and connector type affect cabling, installation, and maintenance?

Connection on side B means cabling must reach that side without interference; cable routing must accommodate the connector’s location and orientation. The connector type should be rated for the current, shielding (for resolver feedback), and environmental sealing to avoid signal degradation or mechanical damage.

What does the “standard housing balance” specification mean for vibration and high speed running?

It means Bosch Rexroth applies their default balancing procedures (not the premium or low-vibration grade), which are sufficient for many uses but might allow more residual imbalance than precision-balanced motors. At 10,000 min⁻¹, even small imbalances can generate centrifugal forces that stress bearings and mountings; for sensitive or high RPM applications consider upgrading or ordering an enhanced balance version.

How does nominal speed of 10,000 min⁻¹ affect bearing selection, cooling, and service life?

High rotational speed increases centrifugal forces, bearing wear, heat generation, and possible imbalance effects. Adequate lubrication, precision balancing (standard housing balance helps), and cooling (ambient or forced) are essential to maintain bearing life and performance.

How should centration (centering diameter of 40 mm) and housing balance (standard) be accounted for in coupling to gearboxes or load shafts?

The 40 mm centering diameter ensures the motor can be mounted concentrically with matching hub/gearbox; if the mating component has poor tolerances, imbalance or eccentricity can lead to vibrations. “Standard” balance means they meet Bosch Rexroth’s typical vibration specifications; for ultra-high precision or high-speed applications you may need “precision” balance variants.

What are the thermal considerations given the motor’s continuous torque at standstill and high speed?

Holding torque at zero speed causes current to flow continuously, generating heat even though no rotation; at high speeds, air flow or cooling must dissipate rotor/stator losses. Ensure ambient temperature and mounting allow sufficient convection or forced cooling; otherwise derate performance or duty cycle.

Common Misspellings

Internal Product Review

The MDD025B-N-100-N2G-040FB1 motor from Bosch Rexroth is designed for digital drive controllers with a rated speed of 10,000 min⁻¹. It offers 0.60 Nm continuous torque at standstill and features a 1.0 Nm holding brake. This motor is commonly used in automation and robotics for precise motion control.