Product Description:

The R43SSNA-HS-NS-NV-02 is a servo motor produced by Pacific Scientific and assigned to the R Servomotors series. It converts electrical power into controlled angular motion for packaging lines, pick-and-place heads, and indexing stations, allowing coordinated positioning under digital drive control. The factory code embedded in the part number indicates the magnet type, feedback arrangement, and mechanical options, while the mounting envelope remains consistent across the series. This supports repeatable motion in applications that need accurate starts, stops, and speed changes throughout normal machine cycles.

Its continuous stall capability of 3.9 Nm is the maximum torque the rotor can hold continuously without overheating. During rapid starts or sudden load changes, the drive can call on up to 10.4 Nm of peak torque, giving the axis additional acceleration capacity for short intervals. Rotor inertia is 0.22 × 10⁻³ kg·m², which helps the motor respond quickly while still maintaining stable motion under changing commands. Magnetic flux is produced by samarium-cobalt rare-earth magnets, chosen for temperature-resistant magnetization that helps maintain torque density over long duty cycles. Position data is issued through Hall sensors, providing the drive with commutation cues and basic directional feedback without an added encoder or resolver.

The motor uses a 4.25-inch square frame and a standard housing, allowing direct bolt-on installation to many NEMA-compatible gearboxes or machine plates. Because the assembly is supplied with no brake, power-off holding must be handled by external clamping hardware or by controlled drive torque where appropriate. There is also no shaft seal, so the motor is better suited to dry service areas than to locations exposed to direct liquid spray. Its 3-inch stack length helps keep the axial profile short, which can be useful where clearance around couplings, guards, or cable routing is limited. The lack of secondary feedback also reduces wiring complexity and keeps the electrical interface straightforward.