Product Description:

Pacific Scientific’s SR3642-4822-84-7-48C-CU belongs to the Permanent Magnet DC Motors series. It is intended for constant-speed or variable-speed conveyor sections, small presses, and other direct-drive automation axes that rely on steady torque from a compact DC motor. As a permanent-magnet design, the motor produces its field without external excitation, which reduces system wiring and power-stage complexity while delivering predictable performance over its service life in industrial machinery.

The armature circuit is energized at 90 VDC, and under that supply the winding draws a continuous current of 4.7 A. That current, multiplied by a torque constant of 4.2 lb-in/A, yields a continuous shaft capability of 18.0 lb-in. The motor sustains this load while running at its rated speed of 1750 RPM, so speed regulation is maintained without exceeding thermal limits. A resistance of 0.9 Ω limits inrush and simplifies drive sizing, while an inductance of 3.8 mH helps shape current ripple for smoother commutation. These electrical values support dynamic response when the drive issues rapid torque commands, allowing the axis controller to estimate acceleration and braking behavior more accurately.

An output of 0.5 HP is available for continuous mechanical work, with transient overloads handled by a peak current capability of 74.0 A. That short-term surge lets the motor overcome breakaway friction or sudden load spikes without stalling. A TENV enclosure helps keep ambient dust out while relying on surface radiation for heat dissipation, making the unit suitable for clean indoor panels where airflow is limited. Mechanical integration is simplified by a standardized shaft that measures 0.625 in in diameter, which supports common couplings and pulley bores without secondary machining.