Product Description:

The R21GMNA-HS-LB-NV-02 servo motor is manufactured by Pacific Scientific as part of the R Servomotors series. It functions as a compact rotary actuator that connects to a matched drive for precise positioning and speed regulation in automated machinery. By converting commanded current into controlled shaft motion while returning electrical feedback, the unit serves pick-and-place heads, light conveyors, and laboratory equipment that require repeatable movement without overshoot.

The motor develops a continuous stall torque of 0.3 Nm, indicating the static load it can hold indefinitely at rated temperature. For rapid indexing, it supplies up to 0.88 Nm of peak torque, providing short-term overload capacity. Shaft rotation reaches up to 4000 rpm, supporting moderate-speed axes in packaging equipment or test stands. A rotor inertia of 0.01 × 10⁻³ kg·m² minimizes the energy needed for acceleration and deceleration, enabling tight control loops. High flux density comes from a rare-earth samarium-cobalt magnet set, increasing torque per frame without increasing motor size. Hall sensors provide primary commutation feedback, and the winding type is the standard configuration used throughout the series.

The motor uses a 2.0-inch outside-diameter round frame with metric mounting threads, allowing direct attachment to IEC gearboxes or custom brackets. For fine positioning, the secondary feedback stage is a 1000 ppr encoder with differential line-driver signals. The magnetic stack measures only 1 inch in length, keeping the overall package depth short for space-limited installations. Because the motor has no shaft seal, it should be mounted in a clean environment that limits exposure to dust, moisture, and other contaminants. The motor also omits an internal brake, so an external locking device must secure a vertical axis when power is removed. The housing follows the standard cylindrical style used for this frame and provides a compact profile for installation near adjacent machine components.