Product Description:

The R43HSNA-NP-RW-VS-03 is a brushless servo motor produced by Pacific Scientific within the R Servomotors series. This unit belongs to the manufacturer's general-purpose rotary drives and is intended for closed-loop motion axes that demand repeatable torque and velocity. By converting stator-fed currents into synchronized rotor movement, the motor supplies the mechanical power required for packaging lines, pick-and-place actuators, and other automation equipment where tight position control and quick response are vital. As a servo motor, it interfaces with external drives that regulate current and commutation, making it suitable for installations where compact footprints and moderate inertia are needed.

Its continuous stall torque is 3.9 Nm, allowing the shaft to hold load steadily without overheating when energized at rated current. The frame measures 4.25 inches square, so the mounting face aligns with standard IEC and NEMA adaptor plates in compact machinery. A rotor inertia of 0.22 × 10⁻³ kg·m² provides a balance between acceleration capability and load damping. Magnetic flux is generated by samarium cobalt rare-earth magnets, which maintain high coercivity at elevated temperatures and minimize demagnetization risk. Under nominal drive excitation, the rotor reaches 3700 rpm, supplying high linear speeds when coupled to belt or ball-screw transmissions.

Transient demands are handled by a peak torque rating of 10.4 Nm, permitting short bursts of extra force during indexing or rapid starts. A Viton shaft seal is fitted to limit dust or coolant ingress at the output journal, supporting use in IP-compliant system housings. The active magnetic stack is 3 inches long, giving the motor its power density while keeping the overall envelope small. A high-speed winding lowers back EMF so the drive can deliver full voltage up to the rated speed. The housing follows the manufacturer's standard style, the motor is supplied without a holding brake, and no primary feedback device is included, so an external encoder is required to match the controller's requirements.