MDD090C-N-030-N2L-130GA2

MDD Synchronous Motors

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The MDD090C-N-030-N2L-130GA2 motor by Bosch Rexroth Indramat belongs to the MDD Synchronous Motors series. It offers a continuous torque at standstill of 10.4 Nm, a holding brake torque of 11.0 Nm, a 130 mm centering diameter, and standard balancing. The motor operates at a nominal speed of 3000 min⁻¹ with digital servo feedback and a standard housing. It features a plain shaft and a side A connector.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
11.0 Nm

Centering Diameter
130 mm

Housing
Standard

Motor Feedback
Digital servo feedback (DSF)

Continuous Torque at Standstill
10.4 Nm

Motor Length Code
C

Motor Size
090

Nominal Speed
3000 min⁻¹

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Connection Direction
Side A

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What advantages does the 10.4 Nm standstill torque provide in motion control systems?

At standstill, that torque ensures the motor can resist external loads (e.g. holding a load without drifting) without slipping, enabling precise positioning. It also determines sizing of mechanical components (gears, belts) to avoid overspecification or underperformance.

How does the 11.0 Nm holding (blocking) brake affect safety and machine uptime?

The holding brake allows the motor shaft to be locked mechanically when de-energized, preventing unintended motion—which is crucial for safety during power loss or maintenance. It adds extra weight and cost, and requires reliable actuation circuitry (often 24 V DC to release) and periodic check-ups to ensure proper holding force.

How does the centering diameter of 130 mm influence integration into existing machinery?

The centering diameter is critical for mounting interfaces and coupling alignment. A standard 130 mm diameter helps ensure compatibility with machine flanges, reducing need for custom adapters—but misalignment tolerance diminishes as diameter increases, so precision in the housing assembly becomes more important.

What does “standard balancing” mean and when would higher balance classes be necessary?

Standard balancing (often class R or N per DIN) ensures vibration is within acceptable limits for typical speeds. For very high-speed or precision applications (spindles, optics, aerospace), higher balance classes reduce centrifugal vibration and extend bearing life.

Why is a plain shaft chosen versus a shaft with keyway, and what are the trade-offs?

A plain shaft provides backlash-free torque transmission when using clamping couplings or shrink sleeves, which improves positional accuracy and repeatability. However, it may require more expensive coupling hardware, and in high radial loads a keyway version might offer better form-fit for resisting torque pulses or shear.

Common Misspellings

Internal Product Review

The MDD090C-N-030-N2L-130GA2 motor from Bosch Rexroth features 10.4 Nm continuous torque at standstill and a nominal speed of 3000 min⁻¹. It includes an 11.0 Nm holding brake, digital servo feedback, and a 130 mm centering diameter. This motor is ideal for use in packaging machines, textile equipment, and robotics.