R911255576 (MDD090C-N-030-N2M-110PB1)

How does the 6.5 Nm holding brake affect system safety and motion locking?

The holding (blocking) brake ensures the motor shaft resists movement when power is off, but its 6.5 Nm limit means it can be overpowered if external load torque exceeds that. You must design gear ratios, backlash, and external forces so that the brake capacity remains adequate during emergency stops or idle states.

What are the implications of the 110 mm centering diameter in mounting alignment?

The large centering diameter ensures better positional repeatability and stability for direct mounting of machine frames or couplings, reducing alignment error. It also demands sufficient clearance in your mounting structure and compatibility with mating flanges.

How should you manage heat dissipation given the motor’s natural convection cooling?

Since the motor relies on surface cooling (no forced fan), you must ensure free airflow around the motor and avoid enclosure restrictions; ambient temperature above 45 °C or restricted flow requires torque derating. The motor’s spec sheet notes derating up to 55 °C and altitudes to 5000 m as possible with reduced output

How does the sealed keyway shaft with shaft seal affect coupling and reliability?

The shaft seal protects against contaminants and helps maintain performance in harsh environments, but the keyway requires precise coupling alignment to avoid stresses. When coupling to gearboxes or pulleys, rigid alignment, minimal radial misalignment, and correct key tolerances are essential to avoid premature wear.

For the motor MDD090C-N-030-N2M-110PB1 by Bosch Rexroth, what considerations apply to its braking and motion applications?

Because the integrated brake only holds 6.5 Nm, it’s insufficient for high inertial loads—so you may need a mechanical lock or gearbox with brake for heavy duty arrest. Also, ensure your control system issues correct brake-release timing relative to servo enabling to avoid cogging torque interfering with motion.

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mdd090c-n-030-n2m-110pb1

The MDD090C-N-030-N2M-110PB1 motor by Bosch Rexroth Indramat is designed for use in CNC machines, robotics, and press feed applications. It features a sealed keyway shaft, multiturn absolute encoder, and a holding brake with 6.5 Nm torque. Operating at 3000 min⁻¹, it provides 10.4 Nm continuous torque for accurate motion control.