Product Description:

The R43HCNA-NP-RW-VS-03 is a Pacific Scientific motor in the R Servomotors series. As a brushless servo unit, it converts commanded current from a digital drive into precise rotary motion for indexers, pick-and-place heads, and other axes within automated assembly lines. The standard housing allows straightforward installation beside existing control hardware, and the factory package eliminates the need for external gear trains. By supplying consistent torque and speed under closed-loop control, the motor helps automated equipment maintain cycle accuracy and throughput.

At continuous excitation, the rotor can hold 3.9 Nm without rising above its thermal limit, establishing the baseline torque available for steady loads. The square frame footprint of 4.25-inch square matches common servo mounts for straightforward installation. Fast attachment is handled by a NEMA face interface that centers the shaft and keeps axial runout within drive tolerances. System response is aided by rotor inertia trimmed to 0.22 kg·m² ×10⁻³, reducing the effort the drive must apply to reverse direction. During accelerations or brief disturbances, the electromagnetic circuit produces up to 10.4 Nm, covering the peak demands of indexing tables and tooling heads.

The motor achieves a rated velocity of 3700 rpm, a figure supported by the high-speed winding that minimizes heating at elevated frequencies. Torque density is maintained by rare-earth samarium cobalt magnets, whose stable flux resists demagnetization during temperature swings. A Viton shaft seal safeguards the interior bearings when coolant spray or fine dust are present. With a magnetic stack only 3 inches long, overall length stays short so the unit fits in confined machinery bays. Because it is supplied without a holding brake, static positioning relies on the drive, and external encoders can be used when tighter accuracy is required.