Product Description:

The R46GSNA-TS-NS-NV-12 is a brushless AC servo motor built by Pacific Scientific within the R Servomotors series. Designed as a torque source for closed-loop positioning axes, the unit converts drive current into controlled rotary motion for indexing tables, pick-and-place heads, and other automated machinery. Its compact square frame and rare-earth magnetic circuit allow the motor to deliver high dynamic response while remaining compatible with standard servo amplifiers used throughout industrial automation. This makes the motor suitable for applications that require frequent starts, stops, and reversals with repeatable motion.

In continuous operation, the motor can sustain 7.6 Nm of stall torque, meaning it can hold that load indefinitely without exceeding rated temperature. During acceleration or transient load spikes, it reaches a peak output of 20.2 Nm, providing extra headroom for rapid cycle moves. The rotor inertia is limited to 0.40 kg·m² × 10⁻³, so commanded speed changes propagate quickly without causing servo instability. Mechanical integration is simplified by the 4.25-inch square flange, which matches NEMA-size mounting hardware. Magnetic flux is produced by a rare-earth samarium-cobalt rotor, a material that maintains high remanence over a wide temperature range and supports the compact geometry.

The motor stack is built to a depth of 6 inches, and the housing allows natural air convection without auxiliary cooling equipment. Position and velocity signals are delivered through a Tachsyn resolver, so no external encoder adaptation is necessary, and the lack of a secondary feedback channel simplifies cabling. For applications that depend on passive holding force, the unit ships with no brake, and it is also supplied with no shaft seal, so the coupling area should be protected from fluid ingress. A standard winding set matches the series drive tables and supports stable current loop operation with compatible drive electronics.