R37SMNA-R2-NS-NV-02 Pacific Scientific
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The Pacific Scientific R37SMNA-R2-NS-NV-02 is a servo motor from the R Servomotors series. It features a standard housing style with a metric mounting type and uses rare earth samarium cobalt magnet material. The primary feedback is provided by a size 21 frameless resolver, and the motor is built without a shaft seal or secondary feedback.
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Product Description:
The R37SMNA-R2-NS-NV-02 is a servo motor built by Pacific Scientific and assigned to the R Servomotors series. In an automated cell, this rotary actuator receives controlled current from a digital drive and produces precise shaft motion for positioning tooling, conveyors, or indexing tables. The model is suitable for production lines that require repeatable speed regulation and closed-loop positioning within a moderately sized motor envelope. Its combination of controlled rotary motion and compact dimensions supports pick-and-place axes, light gantry systems, and other applications in which installation space is limited.
Its magnetic circuit uses rare-earth samarium-cobalt magnets, which support high magnetic flux within the available frame volume. The unit is supplied with no brake, so stopping and holding torque must come from the drive or an external clamp. A standard housing maintains exterior geometry consistent with other R-frame designs and supports installation in established machine layouts. Machine attachment uses a metric mounting bolt circle, allowing the flange to connect directly to compatible ISO gearboxes and linear stages. Rotor position is measured through a frameless transmitter-type size 21 resolver. This resolver sends continuous sine and cosine signals to the drive, allowing precise interpolation of the rotor angle for closed-loop speed and position control.
Feedback wiring is simplified because the motor has no secondary feedback device, reducing the number of conductors and potential connection points in the harness. The shaft interface has no shaft seal, so the host machine must prevent dust or fluids from reaching the shaft opening when the motor operates near contaminants. The absence of seal friction also reduces mechanical drag during rapid start-and-stop cycles. Samarium-cobalt magnetic material helps the motor maintain a compact frame while supplying the magnetic field needed for responsive torque production. The resolver provides the primary rotor-position signal required by the drive, while the metric flange supports direct mechanical alignment with compatible equipment. External load retention is necessary whenever the drive cannot provide holding torque because the motor does not contain a brake.
