Product Description:

The SR3642-4822-84-7-56HC-CU is a permanent-magnet DC motor produced by Pacific Scientific within its Permanent Magnet DC Motors series. The unit converts direct-current electrical power to rotational motion and is typically integrated into conveyor drives, labeling stations, or positioning tables that need speed consistency without complex electronic commutation. In industrial automation, it acts as a low-maintenance actuator because the field magnets are fixed, so only the armature windings receive supply from a DC drive.

At a base speed of 1750 RPM, the armature can be coupled directly to common 1:1 belt drives without intermediate gearing, keeping mechanical losses low. The motor achieves its nominal electromagnetic performance when a supply of 90 VDC is applied, a voltage level supported by many standard DC drives. Under these conditions, it can deliver a continuous shaft torque of 18.0 lb-in while drawing a steady armature current of 4.7 A. This current-to-torque relationship is indicated by a torque constant of 4.2 lb-in/A, so each additional ampere from the controller adds roughly four pound-inches of torque. These figures describe the steady-state operating point for wiring, fuse, and feedback selection.

For intermittent loads, the motor produces up to 0.5 HP, giving enough output for fractional-horsepower gearmotors, treadle systems, or small mixers that run in duty cycles. Short bursts of acceleration are sustained by an allowable peak armature current of 74.0 A, so the drive can overcome load inertia without stalling. The copper resistance of 0.9 ohm limits continuous thermal dissipation, while an armature inductance of 3.8 mH filters current rise and reduces brush arcing during PWM drive operation. These values describe how the armature circuit responds during acceleration and continuous operation.