R63GSSA-HS-SS-NV-03 Pacific Scientific
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The Pacific Scientific R63GSSA-HS-SS-NV-03 is part of the R Servomotors series and is a servo motor with a frame size of 5.75 inches square. It features a continuous stall torque of 8.3 Nm and a peak torque of 20.5 Nm, with a rated speed of 3400 RPM. This model uses rare earth samarium cobalt magnets and primary feedback by Hall sensors.
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Product Description:
The R63GSSA-HS-SS-NV-03 is produced by Pacific Scientific and belongs to the R Servomotors series. Configured for closed-loop drive systems, this motor converts electrical power into controlled mechanical rotation so controllers can hold position, follow velocity profiles, and deliver instantaneous torque in automated conveyors, pick-and-place tooling, and light machining modules. Its square frame geometry and integrated thermal path simplify mounting inside cabinets or directly on machine frames, helping builders minimize envelope size while preserving dynamic performance.
At the core of its performance envelope is a continuous stall capability of 8.3 Nm, which is the torque the shaft can deliver indefinitely without exceeding rated temperature. During rapid accelerations, the motor rises to a peak of 20.5 Nm, giving drives reserve for overcoming static friction or brief overloads. A rated speed of 3400 rpm aligns with common gear ratios so users can achieve target linear velocities without overspeeding the rotor. Dynamic response is aided by an inertia of 0.81 kg·m² × 10⁻³, allowing swift direction changes without demanding excessive current. The mounting face is a 5.75" square frame, matching the bolt pattern of many NEMA 56 style brackets and keeping mechanical interchangeability consistent across the series.
The rotor uses rare earth samarium cobalt magnets, which raise flux density while resisting demagnetization at elevated temperatures. Electrical commutation and coarse position referencing are provided by Hall sensors, enabling mid-range drives to detect rotor orientation without an external encoder. The motor has no shaft seal, so installations in wet or dusty zones must protect the front bearing with external guarding. Internally, a standard winding balances current demand with voltage rating, and it is packaged inside a standard housing style with a 3-inch stack length that keeps mass low while maintaining the thermal path needed for continuous duty.
