Product Description:

The S31HNNA-RNNM-00 is a 6-pole Neodymium magnet brushless servo motor manufactured by Pacific Scientific as part of the S Brushless Motors series. It converts electrical input from a servo amplifier into tightly regulated rotary motion for conveyors, small gantries, and indexing stations on automated production lines. The motor follows the NEMA frame mounting convention, allowing straightforward interchange with other motion axes, and a size 21 frameless resolver supplies precise rotor position data to the drive for closed-loop control.

Its continuous stall capability is 2.2 Nm, meaning the stator can hold that torque indefinitely without surpassing thermal ratings. When starting or responding to sudden load changes, the rotor can reach a peak output of 6.2 Nm. Winding design H yields a torque constant of 0.7 Nm/ARMS, so commanded phase current translates directly to predictable load force. Current dynamics are shaped by the line-to-line inductance of 10.3 mH, which moderates current rise, while the phase resistance of 4.1 Ohms sets copper losses during sustained duty. Only one magnetic stack is used to minimize length, and power and resolver leads terminate through a motor-mounted MS connector. The unit is supplied without a holding brake, without a shaft seal, and with no secondary feedback device.

From an inertial standpoint, the rotor presents 0.18 kgm² × 10⁻³, assisting high acceleration profiles without excessive drive effort. The standardized frame size of NEMA 34 fixes the pilot diameter and bolt circle, easing mechanical integration with gearheads or belt drives. Overall mass is 3.2 kg, which reduces the load on linear slides when the motor moves with the axis. A back-EMF constant of 0.44 VRMS/rad/sec indicates the voltage margin required for rated speed, supporting stable velocity regulation in precision equipment.