Product Description:

The R43HCNA-R2-NS-VS-00 is a brushless AC servo motor produced by Pacific Scientific and placed in the R Servomotors series. It supplies controlled rotary motion for indexing tables, pick-and-place modules, and web-handling axes used in industrial automation. When connected to a matched drive, the motor reports shaft position through its size-21 frameless resolver so the controller can correct error in real time and keep process timing within tolerance. This feedback arrangement supports stable speed and position regulation in automated machinery that depends on repeatable motion.

The motor provides a continuous stall torque of 3.9 Nm, giving the axis steady force without overheating. When rapid acceleration is needed, the unit delivers up to 10.4 Nm of peak torque for short intervals. At a rated speed of 3700 rpm, the electromagnetic design balances torque production with thermal dissipation during high-duty operation. Rotor inertia is limited to 0.22×10⁻³ kg·m², allowing velocity changes to be commanded quickly while minimizing overshoot. The stator and endbells form a compact 4.25" square frame that fits equipment with restricted mounting space. This combination suits servo axes that must start, stop, and reverse frequently while maintaining controlled motion.

The armature operates with rare earth samarium-cobalt magnets, which raise torque density while resisting demagnetization at elevated temperature. Installation is simplified by a NEMA face flange, and shaft ingress protection is provided by a Viton shaft seal. Because the unit is built with no holding brake, the load can be back-driven when power is removed or secured with an external brake if static locking is required. Its 3-inch stack length and high-speed winding help keep mass and copper loss moderate during regular operation.