Product Description:

Pacific Scientific manufactures the R46HSNA-R2-NS-NV-03 within its R Servomotors series. This model is intended for closed-loop motion axes where consistent torque and position accuracy are required in industrial automation equipment. With permanent magnets and closed-loop feedback, the motor can be integrated with digital drives to move loads quickly and repeatably in packaging lines, material-handling stages, or similar machinery. The square frame and standard housing outline allow easy mounting to mechanical gear trains without major bracket changes. It is suited to applications that need repeatable starts, stops, and direction changes.

This unit is a servo motor, and its continuous stall torque is 7.6 Nm, providing steady shaft force at zero speed. During acceleration, the motor can deliver up to 20.2 Nm of peak torque, which increases its dynamic range. A 4.25-inch square mounting face concentrates this output into a compact envelope, while the High Speed winding shortens electrical time constants so current rises quickly. Torque is produced by a rare earth (samarium cobalt) magnet set that keeps flux density stable at high temperature. Primary position information comes from a size-21 frameless resolver, which supplies analog sine-cosine signals for fine interpolation by the controller.

Rotor inertia is 0.40 × 10⁻³ kg·m², enabling quick speed transitions without imposing excessive load on the drive. A stack length of 6 inches sets the overall body depth, and the standard housing style simplifies alignment with couplings or gearheads. Because the unit is supplied with no brake, holding position during power loss requires static motor torque or an external clamp. There is no secondary feedback device, and the shaft end has no seal, so the installation area should be kept free of fluid ingress.