MDD021B-N-100-N2G-032FB0

It means the motor can hold loads requiring up to ~0.30 Nm without rotating even when stationary, which is useful for positioning or vertical loads. However, torque drops off at higher speeds, so dynamic load requirements must be checked against its torque-speed curve.

Drives must provide safe logic for axis holding or stopping, since the motor has no built-in brake; applications requiring safety holding (e.g. safety stops, vertical axes) need an external brake or mechanical lock. The drive must also handle dynamic braking and be capable of safe shutdown without relying on brake torque.

The 32 mm centering diameter ensures compatibility with coupling hubs or mounting fixtures designed for that standard size, aiding accurate alignment and reducing eccentric loads. Length code B indicates moderate shaft length and housing depth—important for fitting into compact assemblies and managing moment of inertia.

Standard balancing (balance class N for smaller sizes) is sufficient for many applications, but at high speeds (> about nominal), residual imbalance can cause vibration, bearing wear, and noise; if extremely low vibration or high RPM is needed, higher balance classes or special balancing may be needed.

A plain shaft is simpler and less expensive, allowing non-positive shaft couplings (press fits, clamping hubs), but it can slip if torque or load exceeds friction; a keyway shaft provides positive torque transmission but introduces stress concentration and requires alignment for key fits. Which to use depends on load magnitude, shock loads, and installation precision.