Product Description:

The R43GENA-R2-NS-NV-00 is a brushless servo motor manufactured by Pacific Scientific within the R Servomotors series. In automated machinery, it acts as the electromechanical actuator that delivers precise angular displacement under command from a digital drive and motion controller. By combining magnetic excitation with feedback, the motor supports repeatable positioning on packaging lines, electronic assembly platforms, and other production systems that require accurate speed and torque regulation.

Its continuous stall torque is 3.9 Nm, which indicates the steady load the rotor can hold without overheating under proper operating conditions. For rapid acceleration, the motor can deliver peak torque up to 10.4 Nm, providing short bursts of force to overcome inertial starts or sudden process changes. Nominal operation is specified at 1500 rpm, which suits common drive amplifier outputs used on material-handling axes. The rotor inertia is 0.22 × 10⁻³ kg·m², allowing responsive yet stable motion profiles during changes in speed and direction. Mechanically, the frame measures 4.25" square, so the mounting flange fits standard NEMA-style panels while keeping the package compact inside crowded machine layouts.

The magnetic circuit uses rare-earth samarium cobalt material, supporting the torque ratings while limiting thermal rise. Position feedback is provided by a frameless resolver, transmitter type size 21, which supplies analog sine-cosine signals for precise commutation without secondary sensors. The laminated stack length is 3 inches, matching the motor's power level while maintaining the stated inertia. Because the assembly ships with no brake, an external holding method is required when the axis must remain locked at power-off. The motor also has no shaft seal, which limits use to clean, dry environments, and it uses an English mounting pattern with a standard winding.