MDD025A-N-100-N2K-040PL0

MDD Synchronous Motors

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The MDD025A-N-100-N2K-040PL0 motor from Bosch Rexroth Indramat's MDD Synchronous Motors series features an integrated absolute encoder and resolver feedback. It delivers a continuous torque at standstill of 0.33 Nm, runs at a nominal speed of 10000 min⁻¹, and includes standard balancing. The shaft uses a DIN keyway design with a shaft seal and connects via a left-facing connector. This housing is standard and it comes without a blocking brake.

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
keyway

Connection Direction
Left

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Output Shaft
Shaft With Keyway Per DIN 6885 sh. 1, 8-68 Edition

Frequently Asked Questions

What is the effect of having “left-facing connector” orientation on system wiring and installation?

Connector orientation defines how motor cables route, which impacts cable length, bend radius, signal integrity, and mechanical clearance; a left-facing connector may force cable trays or conduits to be arranged accordingly to avoid tight bends or strain. Also, connectors must be compatible and sealed as needed, especially in environments with exposure or vibration, to maintain feedback signal integrity and prevent faults.

How does rotor inertia (due to motor size 025 and length code A) influence dynamic response and control tuning?

Smaller motors with lower inertia respond quicker to torque commands; size 025 and minimal length (code A) limits the rotor mass, meaning better responsiveness in acceleration and deceleration. Control loops (velocity, torque) will still need tuning to account for inertial mismatch if the load inertia is much higher, or overshoot/oscillation may occur.

How does “with shaft seal” affect maintenance and lifespan in harsh or wet environments?

A shaft seal helps keep lubricants in and contaminants out, protecting bearings and internal feedback systems from moisture and dust ingress; this can significantly increase lifetime in tough environments. However, seals add friction and slight torque loss, and over time the seal material can degrade; periodic inspection or replacement may be needed.

What are real-world trade-offs of choosing “without blocking brake” in applications that require holding position?

Without a brake, you rely entirely on the drive and controller to hold position using torque, which uses power and can allow drift under torque loads or if power is lost. Incorporating mechanical brakes or holding mechanisms may be necessary for safety or vertical axes, adding cost and complexity.

What does “housing standard” imply for thermal dissipation and environmental protection?

“Standard housing” means no additional fins, water-jacket or IP rating beyond what is default, so ambient temperature and airflow matter: continuous high load at high rpm will heat the motor unless ventilation or heat sinks are adequate. If used in dusty, moist or contaminated environments, additional protection or sealed enclosures may be required.

Common Misspellings

Internal Product Review

The MDD025A-N-100-N2K-040PL0 motor, from Bosch Rexroth Indramat, is designed for digital drive controllers. It includes an integrated absolute encoder, resolver feedback, and delivers 0.33 Nm of continuous torque with a nominal speed of 10,000 min⁻¹. This motor is suitable for applications in robotics, industrial automation, and CNC machinery.