MDD025B-N-100-N2G-040FF0

MDD Synchronous Motors

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The MDD025B-N-100-N2G-040FF0 servo motor by Bosch Rexroth Indramat belongs to the MDD Synchronous Motors series. It features motor size 025, motor length code B, a 40 mm centering diameter and no blocking brake. The motor runs at a nominal speed of 10000 min-1 with resolver feedback and a plain shaft design. It delivers 0.60 Nm continuous torque at standstill and uses a connecting cable with coupling unit for its connection.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

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
Right

Connection Type
Connecting cable with coupling unit

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What impact does using resolver feedback have on the precision and stability of the MDD025B-N-100-N2G-040FF0 in closed‐loop motion?

Resolver feedback offers robust, noise‐resistant position sensing but at lower resolution (≈ ±7 angular minutes) than high‐end optical encoders. It ensures stable commutation and good repeatability, especially under harsh conditions, though fine positional accuracy and repeatability are less tight than absolute encoder versions.

What are the limitations imposed by the nominal speed of 10,000 min⁻¹ when integrating this motor into an automation application?

Running near 10,000 RPM demands that bearings, shaft dynamics, and couplings are balanced to avoid vibration, wear or resonance; gearboxes or load inertia must be minimized. Also, thermal losses (windage, friction) rise with speed, imposing more stringent cooling or duty cycle constraints.

How does the absence of a blocking (holding) brake in the MDD025B-N-100-N2G-040FF0 affect safety and function in vertical or load‐holding applications?

Without a brake, the motor cannot mechanically prevent motion when power is removed, so external brakes or locks are needed in vertical axes or safety‐critical load retention scenarios. Designers should consider adding a brake or mechanical wedge if position must be held during power failure.

For B2B or industrial machine builders, what advantages does choosing this model offer over a lower speed/lower torque alternative?

Higher nominal speed allows for smaller gear reduction, lighter weight, and faster response, reducing inertia in motion axes and improving cycle time. The combination of standard centering, plain shaft, resolver feedback and moderate torque enables flexible design integration with less custom machining or modifications, lowering cost and complexity in production or maintenance.

How does the continuous torque at standstill of 0.60 Nm affect load‐holding and acceleration in dynamic applications?

At standstill, the motor can resist loads up to 0.60 Nm without rotating, which is useful for holding or zeroing mechanical systems under load. However, dynamic acceleration torque will be limited by thermal ratings and drive current; continuous operation near stall requires good cooling and drive sizing.

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Internal Product Review

The MDD025B-N-100-N2G-040FF0 motor by Bosch Rexroth Indramat is designed for digital drive controllers. With a nominal speed of 10,000 min⁻¹ and a continuous torque of 0.60 Nm, it suits applications in robotics, automation, and industrial machinery. Its resolver feedback and plain shaft ensure reliable performance in high-precision tasks.