Product Description:

The R84HENA-R2-NS-NV-00 is an AC servo motor produced by Pacific Scientific and included in the R Servomotors series. Designed for automation axes that demand high rotational speed and repeatable torque, it converts drive current into controlled mechanical motion for packaging, pick-and-place, and material-handling machines. The standard housing format supports integration into established machine layouts without requiring unusual mounting hardware. The motor is supplied without an integral holding brake, which reduces overall length and inertia in systems that rely on drive torque or external holding methods.

Under continuous stall conditions, the motor supplies 22.5 Nm of torque, giving the axis steady force when the shaft is motionless. During acceleration or short overload periods, it can reach a peak value of 44.5 Nm, which helps the system overcome inertial loads without losing synchronization. The rotor inertia of 4.43 kg·m² × 10⁻³ supports rapid speed changes without requiring excessive current from the drive. Rated operation is set at 4000 rpm, allowing high shaft speed while keeping the motor within its intended thermal range. The motor uses a 7.5″ square mounting face that follows English dimensional conventions and fits common NEMA-style couplings and gearboxes.

Torque production is supported by samarium cobalt magnets, which help maintain magnetic strength at elevated operating temperatures. The stator uses a High Speed winding so current and copper losses remain appropriate for high-speed operation. An axial stack length of 4 inches keeps the motor compact while still providing enough active material for its continuous torque output. Position feedback is provided by a frameless resolver size 21, which supplies rotor position information without the added bulk of a separate encoder assembly. The motor has no shaft seal and no secondary feedback channel.