HSD Rotax AT/MT 1073-120 Electrospindle Motor 3 kW 18,000 RPM Fan-Cooled

This electrospindle motor is a sturdy and high-performance option commonly employed in sophisticated industrial and CNC machinery automation.

Brand: HSD Rotax (HSD S.p.A., Italy)

Model: AT/MT 1073-120

Type: Electrospindle motor, asynchronous 3-phase, high-speed

Power Output:

Continuous (S1 duty) power: 3.0 kW (about 4 HP)

Intermittent (S6 duty 40%) power: 3.7 kW (about 5 HP)

Voltage: 220 V (some variants with 380 V)

Frequency: Up to 300 Hz (depending on inverter and spindle)

Speed:

Rated speed: 18,000 RPM

Maximum speed: 24,000 RPM

Cooling: Fan-cooled (shaft-driven fan)

Bearings: Available with specialized bearing designs for precision and endurance, includes radial and conical bearings for high-speed operation

Torque:

Continuous torque: Around 1.6 Nm

Peak torque: Around 1.9 Nm

Tool Interface: Commonly equipped with HSK C32 or ER 25 collet holders depending on version

Protection: Usually IP50 rating

Insulation class: Class F

Weight: Generally around 3 kilograms

Applications: Designed for CNC machining centers for milling, routing, engraving, and high-speed cutting across wood, plastics, metal, and composites

Compliance: IEC 60034-1 specifications for electric motors

Additional: Suitable for manual tool change (MTC) versions, provides fine spindle control with contemporary CNC inverters