Product Description:

Pacific Scientific manufactures the SR3642-4982-7-10-56BC direct-current motor as part of its Permanent Magnet DC Motors series. This unit uses a permanent-magnet field design to convert a regulated DC supply into constant-speed rotary motion for conveyors, web-handling equipment, and other automated machinery. By using a self-contained enclosure, the motor can be mounted inside control cabinets or on exposed frames without external ventilation hardware.

The motor is designed for a rated armature supply of 180 VDC. At this voltage, it turns at a nominal speed of 1750 RPM, which suits line-driven applications that require tight speed regulation. During normal operation, the armature draws 2.6 A and delivers 18 lb-in of torque, which corresponds to its 7.6 lb-in/A torque constant and supports linear output across the operating range. Internal copper windings present an armature resistance of 3.3 Ω, which limits steady-state current while influencing thermal rise. This resistance value helps predict voltage drop and supports appropriate power-cable selection, and the windings are housed in a 56C face-mount frame that simplifies direct coupling to standard gear reducers.

When acceleration or transient load spikes occur, the drive may supply a peak current of 40 A, allowing the motor to reach its 373 W continuous output without saturation. Inductance of 16.2 mH shapes the current rise time so drive tuning can minimize overshoot. The totally enclosed nonventilated housing keeps contaminants away from the internal laminations, and the motor weighs 27 lb while maintaining a compact overall length of 12.13 in. Its continuous-duty rating supports sustained operation at nameplate load, and the permanent-magnet field eliminates brush-shift adjustments for predictable long-term performance.