R43HSNA-R2-NS-VS-02 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific R43HSNA-R2-NS-VS-02 is a servo motor from the R Servomotors series with a frame size of 4.25 inches square and a 3-inch stack length. It delivers a continuous stall torque of 3.9 Nm and a peak torque of 10.4 Nm, using rare earth samarium cobalt magnets. The servo motor features a high speed winding type and a frameless resolver transmitter as its primary feedback device.
Internal Product Review
The R43HSNA-R2-NS-VS-02 is a Pacific Scientific servo motor with a high-speed winding. Performance is impressive, with 3.9 Nm continuous stall torque and 10.4 Nm peak torque supporting responsive motion control. The combination of frameless resolver feedback and samarium cobalt magnet material makes the motor an excellent choice for accurate, durable servo applications.
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Product Description:
The R43HSNA-R2-NS-VS-02 is a servo motor produced by Pacific Scientific as part of the R Servomotors series. This brushless unit delivers controlled rotary motion for positioning tasks in closed-loop machinery. It is suitable for automated packaging lines, material-handling axes, and other applications that demand precise torque and speed regulation. The motor works with a compatible servo drive to maintain commanded motion as operating loads change.
The motor can sustain a continuous stall torque of 3.9 Nm, providing a baseline for sizing gear ratios and load inertia. Short-duration overloads are handled by a peak torque rating of 10.4 Nm, allowing acceleration of inertial loads without loss of synchronization. A rotor inertia of 0.22 kg·m² × 10⁻³ supports responsive movement and reduces settling time when directional changes are frequent. Mechanical power output is balanced around a rated speed of 3700 rpm, which supports high-throughput applications while remaining within the motor’s operating limits. Rotor position is reported through a frameless resolver in size 21. This analog feedback device supplies absolute shaft-angle data to a matching drive, enabling smooth sinusoidal commutation and accurate position control.
The square frame measures 4.25 inches on each side, simplifying direct flange mounting to standard NEMA adapters. A Viton shaft seal restricts fluid ingress along the output shaft, which is useful in washdown or coolant-rich environments. Magnetic flux is generated by a rare-earth samarium-cobalt rotor set, increasing torque density and resisting demagnetization at elevated temperatures. The copper windings use a high-speed design to reduce resistive losses during high-speed operation. A 3-inch stack length fits within the series’ standard housing. The motor is supplied without a holding brake, so an external mechanism or drive-applied torque must secure stationary loads when necessary. It uses a standard housing style and has no secondary feedback channel, reducing weight and complexity in installations that require only one feedback source.
