MDD025A-N-100-N2K-040PL1

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040PL1 is a motor manufactured by Bosch Rexroth Indramat. Part of the MDD Synchronous Motors, it includes an absolute encoder and resolver feedback. It delivers 0.33 Nm continuous torque and 1.0 Nm holding brake torque. A keyway shaft with 40 mm centering diameter and shaft seal fits digital drive controllers.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
1.0 Nm

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
keyway

Connection Direction
Left

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What design considerations stem from the motor’s continuous torque at standstill of 0.33 Nm?

At standstill, it can hold up to 0.33 Nm continuously without overheating, which limits the static load it can hold in applications (e.g. robotic joints or indexing). If greater holding torque is needed, the brake must be used, or the motor size increased.

What impact does having a 40 mm centering diameter and keyway shaft with shaft seal have on mounting and coupling?

With the 40 mm centering diameter, alignment in multi-motor or multi-axis systems is more precise, simplifying design of clamping or flanging fixtures. The keyway helps torque transmission without slippage, and the shaft seal prevents ingress of contaminants, important in harsh or dirty industrial environments.

In what ways does the choice of feedback (resolver + absolute encoder) affect controller/drive compatibility and cabling?

Controllers/drives must support both resolver signals and the protocol used by the absolute encoder; connector pin-outs, shielding, and feedback cable lengths are critical to maintain signal integrity. In the MDD line, feedback cables are standardized and there is a maximum recommended length to prevent timing or noise issues

What are practical maintenance issues related to the holding-/blocking brake in this motor?

Brake pads/disks will wear over time (depending on usage frequency and duty-cycle), so periodic inspection or replacement is necessary; neglect may lead to reduced torque or failure to hold position. Also, controlling the brake requires integrating with the drive’s auxiliary circuits (power supply, wiring, control signals) and ensuring the brake is engaged/safe before removing external load.

What trade-offs exist when choosing this motor for B2B automation vs. lower-priced motors without these features?

The inclusion of absolute feedback, holding brake, high speed and sealed shaft increases upfront cost, but for B2B applications this reduces downtime, improves safety, and enables more precise control (less scrap, easier compliance). Simpler motors might be cheaper but may lack the feedback accuracy, require external brakes, or suffer higher maintenance costs and lower usable precision.

Common Misspellings

Internal Product Review

The MDD025A-N-100-N2K-040PL1 motor by Bosch Rexroth Indramat is designed for digital drive controllers. It offers a nominal speed of 10,000 min⁻¹, 0.33 Nm continuous torque, and features an integrated absolute encoder and resolver feedback. This motor is ideal for use in robotics, automation, and industrial machinery, ensuring precise control and reliable performance.