Product Description:

The R8AFENA-R4-NS-NV-02 belongs to the R Servomotors series manufactured by Pacific Scientific. It is a servo motor intended for closed-loop position and velocity control on automated axes such as gantry loaders, indexing tables, and material-handling arms. In these roles, the motor converts electrical power into precisely regulated mechanical rotation so that controllers can coordinate multiple axes within a machine cycle.

The motor delivers a continuous stall torque of 53.4 Nm, allowing it to maintain load position without overheating during static holding conditions. For rapid accelerations, it can reach a peak torque of 109 Nm, giving the drive headroom for fast starts or shock-load events. Its reflected inertia is 10.8 × 10^-3 kg·m², a moderate value that balances quick response with stable control when paired with typical industrial gear trains. The frame measures 7.5 inches square, so the motor fits legacy mounts that follow that envelope. Magnets made from rare-earth samarium cobalt increase air-gap flux density, improving torque density and thermal stability compared with ferrite designs.

The stack length is 10 inches, providing additional active iron to achieve the listed torque while keeping the overall footprint compact. Mounting follows the English bolt pattern, which matches many North American machine interfaces. The motor uses a standard housing. It is built without a shaft seal, so external protection is required where liquids or fine dust are present. The unit is supplied without a holding brake, making it suitable for applications that rely on drive torque or external clamps for static retention. Secondary feedback is not provided, so any redundant encoder or resolver must be added externally if the control architecture requires dual-channel position verification.