R43HMNA-R2-NS-NV-00 Pacific Scientific
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The Pacific Scientific R43HMNA-R2-NS-NV-00 is a servo motor from the R Servomotors series with a continuous stall torque of 3.9 Nm and a peak torque of 10.4 Nm. It features a high speed winding type, a frame size of 4.25 inches square, and is constructed with rare earth samarium cobalt magnets. The motor includes a frameless resolver as primary feedback and operates at a rated speed of 3700 RPM.
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Product Description:
The R43HMNA-R2-NS-NV-00 belongs to the R Servomotors series manufactured by Pacific Scientific. It is a brushless servo motor intended for positioning and speed regulation in industrial automation, where precise motion control is required for indexers, pick-and-place axes, and compact conveyor drives. By combining a rare-earth magnetic circuit with a high-speed winding, the unit provides the torque density and dynamic response needed for modern closed-loop servo systems.
The motor provides a continuous stall torque of 3.9 Nm, allowing it to hold loads without movement when the controller commands zero speed. Its peak torque of 10.4 Nm supports short acceleration bursts before thermal limits are reached. The winding is optimized for a rated speed of 3700 rpm, so the drive can generate full power at moderate bus voltages commonly used in 230 V servo systems. Rotor inertia is 0.22 kg·m² × 10⁻³, and this low value supports rapid tracking of velocity setpoints while minimizing settling time during point-to-point moves. A high-speed coil design reduces inductance and back electromotive force, allowing the amplifier to deliver higher current transients without excessive voltage overhead. The motor mounts with metric hardware and uses a standard housing. It does not include a holding brake, shaft seal, or secondary feedback, so external protection and load-holding measures may be required for installations exposed to contaminants or vertical loads.
The motor has a 4.25-inch square frame that matches many IEC flange adapters used with gear reducers. Its 3-inch active magnetic stack provides the torque constant and thermal mass needed for continuous operation. Flux is produced by rare-earth samarium-cobalt magnets that resist demagnetization at high temperatures and help maintain servo accuracy during continuous cycling. Position information is supplied by a size 21 frameless resolver. This transmitter-type sensor provides absolute rotor angle without relying on optical discs. Its analog feedback signals resist electrical noise over long cable runs, supporting stable position and speed control in industrial environments.
