Product Description:

The SR3642-4822-7-56BC-CV DC motor is produced by Pacific Scientific and belongs to the Permanent Magnet DC Motors series. It is a fractional-horsepower drive component intended for conveyor sections, indexing tables, and other industrial automation axes that require constant torque from a compact chassis. Its permanent-magnet design provides direct DC operation with predictable torque response, which is useful in simple speed-control systems. Supplied with a totally enclosed non-ventilated housing, the unit helps keep airborne contamination away from internal parts while eliminating the need for external airflow devices. Integration is simplified by its NEMA 56C face mounting, allowing direct coupling to gearheads or machine frames without custom brackets. At 12.10 inches in overall length, it fits into control cabinets and other compact machine layouts where axial space is limited.

In continuous duty, the motor delivers 18.0 lb-in of shaft torque while drawing 4.7 A. This operating point supports a half-horsepower output during sustained running. When energized at 90 VDC, the armature reaches a base speed of 1750 RPM, matching common line-shaft and pump requirements. The winding's 0.9 Ω resistance, together with its 3.8 mH inductance, helps smooth current response and reduce commutation ripple. That combination supports stable speed regulation during routine starts, load changes, and normal continuous operation.

For short transients, the armature can accept 74.0 A, producing several times its nominal torque before thermal limits are reached. The electromagnetic design has a 4.2 lb-in/A torque constant, allowing output torque to scale closely with commanded current for precise servo response. A rotor inertia of 6.5 lb-in² provides moderate energy storage for smoother velocity regulation while preserving responsive acceleration. This balance helps the motor react quickly to command changes without making speed control feel abrupt under varying loads. Installation loads are supported by the 27 lbs frame mass, which also serves as a thermal sink during intermittent overloads.