Product Description:

Pacific Scientific’s EP3644-5214-7-56BC-CU belongs to the Permanent Magnet DC Motors series and is intended for fixed-speed or adjustable-speed industrial drives. The model supplies rotational energy directly to conveyors, small web transports, and light machining spindles by converting direct-current input into mechanical shaft output. Permanent magnets in the stator create a constant field so the machine can produce rated torque without separate field wiring, which simplifies panel layouts in automated equipment.

Under armature voltage control, the motor turns at 1750 rpm, a base speed suited for common gear ratios and V-belt transmissions. Its steady-state torque capability is 18.0 lbf-in, allowing the drive to hold load torque during continuous duty without overheating. When coupled through the keyed 0.625-inch shaft, the motor can deliver 0.5 hp to downstream equipment, while the 56C face centered on a 5.875-inch bolt circle provides drop-in interchangeability with NEMA gear reducers. A rated armature supply of 180 V sets the back EMF level used by DC drives for speed regulation, and the armature’s 4.00 Ω resistance influences base current draw and dynamic response during acceleration. Dimensional features such as the 4.500-inch pilot diameter and the 0.188 × 1.38-inch key conform to standard coupling hardware for quick installation.

The motor has a continuous armature requirement of 2.3 A and a momentary surge ceiling of 34.0 A, with the higher value supporting rapid starts or brief overloads without demagnetizing the field. Electromagnetic conversion efficiency is reflected in the torque constant of 8.10 lbf-in/A, ensuring predictable torque per ampere for closed-loop controllers. Winding energy storage, quantified by an inductance of 24.20 mH, shapes current ripple and affects drive PWM tuning. The motor measures 12.38 inches overall and weighs 30 pounds, so it fits compact enclosures while still providing enough mass for smooth speed regulation.