Product Description:

The R43-HSNA-TS-EF-NV-02 belongs to the R Servomotors series from Pacific Scientific. It is a brushless servo motor intended for closed-loop motion axes where accurate speed and position regulation are required on assembly lines, pick-and-place heads, and similar automation stages. The motor converts commanded drive current into mechanical rotation so actuators or gearheads can move loads precisely within an industrial control system. This type of response is useful in applications that require repeatable starts, stops, and controlled holding between moves.

This model provides a continuous stall torque of 3.9 Nm, meaning it can hold that torque indefinitely at zero speed without overheating when correctly cooled. The square mounting face measures 4.25" square, which matches NEMA size 42 hardware and supports direct installation on common machine brackets. An inertia of 0.22 × 10−3 kg·m² gives the rotor moderate resistance to acceleration, which helps the axis respond quickly without making the servo loop difficult to stabilize. Torque production comes from rare earth (samarium cobalt) magnets that provide high magnetic flux density, allowing the motor to reach a peak capability of 10.4 Nm during short load surges such as rapid starts or reversals.

A stack length of 3 inches keeps the package compact while still providing enough active iron volume for this torque class. Classified as a Servo Motor, the unit is used with feedback-equipped drives that close the velocity and position loops during operation. The motor is part of the R Servomotors family, which uses a consistent mechanical format across related sizes. That consistency helps when multiple axes in the same machine must fit within similar mounting envelopes and available clearance.