Performance envelope for axis sizing
The HG-KN73J-S100: Rated output is 0.75 kW with 2.4 N·m of torque at 3000 r/min — this is the continuous-duty point for sizing the drive and mechanical train. Maximum speed reaches 5000 r/min, and instantaneous permissible speed is 5750 r/min, giving headroom for short over-speed moves during indexing or rapid traverse. Rated current draws 4.8 A, with a maximum of 14 A — the 3× ratio tells you the motor can deliver peak torque for acceleration without saturating the windings, as long as the drive's current loop is tuned for it. The recommended load-to-motor inertia ratio is 15 times or less — keep the reflected load inertia within that band to avoid oscillation in the position loop. Above that, the gain tuning window narrows and the axis may overshoot on short moves.
IP65 and oil seal — where it lives
Totally enclosed, natural cooling with an IP65 rating means the motor body and connector end are sealed against dust and low-pressure washdown. No fan means no debris ingestion — suited for food processing, packaging, or machine-tool coolant splash zones. The 'J' in the model designation indicates an oil seal is installed on the output shaft — this blocks oil mist from migrating into the bearing cavity, critical for gearbox-coupled axes or vertical mounts where lubricant creep is a risk. Ambient operating temperature is 0 °C to 40 °C, non-freezing, with humidity up to 80% RH — standard indoor industrial conditions. Storage range is wider at -15 °C to 70 °C, which matters if the motor sits in an unheated warehouse before commissioning.
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