Product Description:

The R46GSNA-HS-SS-VS-04 is a brushless servo motor produced by Pacific Scientific and belongs to the R Servomotors series. It serves as a rotary actuator in industrial automation, translating drive current into precisely controlled shaft motion for indexing tables, gantry axes, and conveying hardware. The design targets applications that need moderate inertia and repeatable torque delivery while fitting into existing square-flange layouts commonly used on packaging and material-handling equipment. Its construction integrates thermal paths that permit continuous duty cycling under servo-grade load profiles.

The mechanical envelope uses a 4.25" square frame coupled with a stack that measures 6 inches in length, which sets its flange pattern and axial magnetic path. Within this volume, the rotor can develop a continuous stall torque of 7.6 Nm, letting the axis hold static loads without thermal derating. For transient moves, it delivers up to 20.2 Nm of peak torque, supporting quick starts or emergency corrections. Dynamic response is helped by a rotor inertia of 0.40 kg·m² × 10⁻³, limiting overshoot during servo tuning. A standard housing style eases direct mounting, and the winding type is preset at the factory for balanced voltage constants.

Energy conversion relies on magnets made from rare earth (samarium cobalt), a composition that sustains high residual flux over long service life. Because the unit ships with no brake, position retention during power loss must be handled by the drive or an external clamp. Feedback for commutation is furnished by embedded Hall sensors, providing coarse rotor position information at each 60-electrical-degree interval. A Viton shaft seal prevents lubricant washout when the shaft protrudes into washdown or oil-mist environments.