R43GENA-R2-NS-VS-00 Pacific Scientific
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The Pacific Scientific R43GENA-R2-NS-VS-00 is a servo motor with a standard housing style and a frame size of 4.25 inches square. Part of the R Servomotors series, it offers a continuous stall torque of 3.9 Nm and a peak torque of 10.4 Nm. This motor features a rare earth samarium cobalt magnet, Viton shaft seal, and a rated speed of 1500 RPM.
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Product Description:
The R43GENA-R2-NS-VS-00 is a brushless servo motor from Pacific Scientific that belongs to the R Servomotors series. The unit is intended for closed-loop industrial automation where precise shaft positioning and controlled velocity are required. By converting drive current into controlled mechanical rotation, it serves as the primary actuator on packaging stations, pick-and-place gantries, and other motion axes that demand repeatable torque delivery. Its brushless design avoids the mechanical wear associated with brushes and supports responsive operation during repeated positioning cycles.
The motor has a 4.25-inch-square frame and a 3-inch stack length, providing a compact cross-section with moderate axial depth. Under continuous stall conditions, the rotor can sustain 3.9 Nm without thermal overload, while short bursts can reach a peak torque of 10.4 Nm for acceleration or shock loads. Dynamic response is influenced partly by a rotor inertia of 0.22 × 10⁻³ kg m²; this low inertia permits rapid speed changes while maintaining stability against load disturbances. The winding delivers rated output at 1500 rpm, a speed suitable for common gear ratios and direct-drive applications. An inch-based mounting interface matches NEMA patterns, and the housing follows the standard style used across the series.
Rare-earth magnets made from samarium cobalt provide high magnetic flux density, helping the motor maintain linear torque across its operating range. Position data is supplied by a size 21 frameless resolver, which avoids the bearing wear associated with housed sensors. No secondary feedback device is included. A Viton shaft seal helps prevent lubricant from escaping and limits the entry of fine contaminants around the shaft. The 3-inch stack positions the rotor core within the stator teeth for effective magnetic coupling. The motor is supplied with no holding brake, so an external holding device or drive-applied torque is required when a stationary load must remain secured. Standard winding and housing selections maintain consistent electrical characteristics and exterior dimensions for this motor configuration.
