Product Description:

The SR3642-4982-7-56BC-CU is a permanent-magnet DC motor produced by Pacific Scientific within the Permanent Magnet DC Motors series. It is intended for fixed-speed or closed-loop applications where direct current simplifies drive electronics and delivers consistent torque for conveyors, packaging stations, or small machine tools. The motor couples a slotted armature to a constant-flux magnet set and fits the 56C frame envelope so it can replace standard fractional-horsepower AC motors on the same mounting face without reworking the mechanical layout. That makes it useful in retrofit installations where surrounding machine components already match common C-face dimensions.

At a continuous armature draw of 2.6 A, the motor develops a steady output of 18.0 lb-in, allowing moderate load holding without overheating. The totally enclosed, non-ventilated TENV housing shields the internal windings and relies on surface cooling rather than forced airflow, which is useful in dusty or oily environments. Armature inductance of 16.2 mH limits current ripple, which helps reduce conducted EMI and supports brush life. Shaft power is rated at 1/2 HP, matching many light industrial actuators that require modest mechanical work. For short acceleration bursts, the windings can withstand up to 40.0 A, giving extra starting torque without damaging the insulation system. Its keyed shaft and 3.3 Ω armature resistance simplify pairing with standard drives, while the 7.6 lb-in/A torque constant supports proportional current control.

Operating speed reaches 1750 RPM when supplied with the nominal armature voltage of 180 V, a combination that aligns with common DC drive outputs and keeps brush velocity within acceptable limits. The removable base allows foot or face mounting, and the NEMA C-face pilot helps maintain concentric alignment with coupled gearboxes. Overall length is 12.13 in, and a shipping weight of 27 lb keeps the motor manageable while still providing useful thermal mass for continuous duty. The enclosed housing also suits compact equipment layouts where airflow is limited and predictable torque delivery is important.