R46GSNA-R2-NS-NV-04 Pacific Scientific
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The Pacific Scientific R46GSNA-R2-NS-NV-04 is a servo motor from the R Servomotors series, featuring a frame size of 4.25 inches square and a six-inch stack length. It offers a continuous stall torque of 7.6 Nm and a peak torque of 20.2 Nm. The motor uses a rare earth samarium cobalt magnet and includes a frameless resolver as primary feedback.
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Product Description:
The R46GSNA-R2-NS-NV-04 is a brushless AC servo motor produced by Pacific Scientific for the R Servomotors series. As a feedback-equipped rotary actuator, it works with digital drives to regulate shaft position and speed in assembly robots, conveyors, and packaging lines. Rare-earth magnets within its compact frame help the motor produce controlled torque for industrial automation tasks that require precise, repeatable motion. The brushless design reduces mechanical wear because electronic commutation eliminates the physical contacts associated with brushed motors.
Rated for a continuous stall torque of 7.6 Nm, the motor can hold a static load while remaining within its thermal operating limits. Its 4.25-inch-square mounting face fits common 108 mm mounting patterns on gearboxes and adapter plates. A rotor inertia of 0.40 kg·m² × 10⁻³ balances quick acceleration with stable speed regulation during repeated positioning cycles. During rapid moves, the electromagnetic system delivers a peak torque of 20.2 Nm, enabling short-term overloads that can reduce cycle time. The magnetic circuit uses rare-earth samarium-cobalt magnets, which provide strong resistance to demagnetization at elevated temperatures. Position data returns to the drive through a frameless transmitter-type size 21 resolver, providing absolute angular information through analog sine-cosine signals. The three-phase stator uses a standard winding pattern compatible with companion R-series drives.
The motor uses a standard six-inch housing, keeping its overall depth suitable for compact machinery and enclosed installations. It is supplied without a brake, so the machine drivetrain or an external clamp must hold the load when motor power is removed. The shaft is provided without a shaft seal, making the motor appropriate for clean, controlled environments where contaminants and moisture do not reach the bearing area. Resolver feedback supplies the drive with the rotor position information needed for electronic commutation and closed-loop motion control. Its moderate rotor inertia supports responsive speed changes while helping the drive maintain smooth rotation under changing loads. Cable routing can remain relatively simple because the resolver provides the primary feedback path required for position and speed regulation.
