R45GCNA-R2-NS-NV-00 Pacific Scientific
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The Pacific Scientific R45GCNA-R2-NS-NV-00 is a servo motor from the R Servomotors series with a frame size of 4.25 inches square and a stack length of 5 inches. It provides a continuous stall torque of 5.7 Nm and a peak torque of 15.1 Nm, and features a NEMA face mounting type and a frameless resolver as primary feedback. This motor uses rare earth samarium cobalt magnets and has a standard housing style with no holding brake or shaft seal.
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Product Description:
The R45GCNA-R2-NS-NV-00 servo motor is produced by Pacific Scientific as part of the R Servomotors series. This brushless AC unit converts drive current into controlled mechanical rotation for indexing tables, pick-and-place axes, and other motion tasks in automated manufacturing cells. It uses a frameless size-21 resolver for primary feedback so the connected drive can close the velocity or position loop without external sensors mounted elsewhere on the axis.
The motor delivers a continuous stall torque of 5.7 Nm, which is the constant load it can withstand indefinitely without overheating while the shaft is locked. During acceleration, it can reach a peak torque of 15.1 Nm, providing extra force for rapid speed changes. Rotor inertia is listed at 0.31 kg·m²×10⁻³, and the low inertia helps shorten settling time and ease tuning of high-bandwidth loops. The stator and flange occupy a compact 4.25 inch square frame, allowing direct replacement in NEMA-size 42 layouts with limited mounting space. Standard windings and a standard housing keep the motor consistent with common installation practices across similar servo systems.
The motor is supplied with no holding brake, so external clamps or motor current must maintain position during power loss. It mounts to the machine with a NEMA face pattern, simplifying alignment to gearheads or couplings, and torque is produced by a rare earth (samarium cobalt) magnet set that maintains flux at elevated temperatures and resists demagnetization. There is no shaft seal, so the installation area must remain free of liquid ingress. The active stack length is 5 inches, which sets the lamination pack depth and contributes to the overall motor length, mass, and thermal path. Secondary feedback is not present, which keeps wiring minimal.
