MDD025A-N-100-N2K-040GR0

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040GR0 motor by Bosch Rexroth Indramat is part of the MDD Synchronous Motors. It offers continuous torque at standstill of 0.33 Nm, a nominal speed of 10000 min-1, an integrated absolute encoder and resolver feedback. The motor has a 40 mm centering diameter and includes a shaft seal for protection. It connects via a right-direction connector and comes without a blocking brake on a plain shaft end.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
40 mm

Housing
Standard

Encoder
Integrated absolute encoder

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.33 Nm

Motor Length Code
A

Motor Size
025

Nominal Speed
10000 min⁻¹

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Connection Direction
Right

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

Can the motor truly run continuously at its nominal speed of 10,000 min⁻¹ under heavy load?

It depends on cooling and power supply: running at 10,000 rev/min continuously with high load increases heat, which if not dissipated could lead to demagnetization or thermal protection kick-ins. In systems with good thermal sink or forced cooling and proper drive current, continuous operation at nominal speed is possible; otherwise duty cycles or derating are required.

What does the 40 mm centering diameter mean for mounting and shaft alignment?

The 40 mm centering diameter is the dimension by which the motor fits into the mounting fixture or bearing housing, leading to precise alignment and minimizing runout. Poor alignment around this diameter can cause excessive vibration or bearing wear, especially at high speeds like 10,000 min⁻¹.

How does having a plain shaft without a blocking brake impact system design?

Without a blocking or holding brake, the motor can’t resist external torques when unpowered—this means gravity, inertia, or backlash might allow the load to move. In applications where holding position under load is critical (vertical axes, or safety-critical), external brakes or counterweights are needed.

What technical implications arise from the shaft seal included with this motor?

The shaft seal helps prevent ingress of dust, particles, or moisture at the shaft interface, preserving internal components and bearings; however, it also increases friction and heat slightly, which must be accounted for in high precision or high‐RPM applications. Over time, the seal may degrade, so maintenance intervals should inspect it to avoid lubricant leakage or contamination.

How critical is connector orientation (“right”-side) for installation and cable routing?

Right-side connector implies power/feedback wiring exit is fixed on that side, so in confined spaces or when designing cable trays the routing must accommodate this without sharp bends or stress. Misrouting can lead to connector fatigue, EMI interference or signal degradation for resolver/encoder lines.

Common Misspellings

Internal Product Review

The MDD025A-N-100-N2K-040GR0 motor from Bosch Rexroth features a nominal speed of 10,000 min⁻¹, 0.33 Nm continuous torque at standstill, and resolver-based motor feedback. It includes a plain shaft with seal, right-side connector, and a 40 mm centering diameter. This motor is well-suited for use in robotics, electronics manufacturing, and textile automation systems.