Product Description:

The S21HNNA-HFVM-00 is a 6-pole Neodymium magnet brushless servo motor manufactured by Pacific Scientific in the S Brushless Motors series. It is engineered for position and speed control tasks inside industrial automation cells. By combining permanent-magnet excitation with electronic commutation, the motor delivers rapid response while eliminating brush maintenance. It interfaces with servo drives that regulate current and velocity loops, making the unit suitable for pick-and-place axes, light packaging machinery, and small robotics where precise torque delivery is needed.

At stall, the motor delivers a continuous torque of 0.5 Nm, while transient demands can be met with a peak output of 1.36 Nm. The torque constant of 0.2 Nm/ARMS links commanded phase current to mechanical output, letting the drive convert current references directly into torque. A phase inductance of 3.7 mH moderates current rise for stable current loops, and the line-to-line resistance of 3.0 Ω determines copper loss at rated current. This model is supplied without a holding brake, so static load retention must be provided externally.

Mechanical integration follows the NEMA frame convention, and the body corresponds to a NEMA 23 size, giving a familiar bolt circle for face mounting. Rotor inertia is 0.042 × 10⁻³ kg·m², which favors rapid acceleration with light loads. A total weight of 1.4 kg eases installation on moving carriages. The voltage constant of 0.13 VRMS/rad/sec informs back-EMF calculations used by the drive. Position data originate from an embedded Hall sensor, while finer feedback is supplied by a 1000 ppr encoder with line-driver outputs. A Viton shaft seal is fitted at the output, and the single-stack construction keeps axial length short. Power and signal wiring exit through a motor-mounted MS connector, completing the H winding version of this S-series unit.