Product Description:

The SRF3744-4266-7-56BC is a permanent-magnet motor built by Kollmorgen under the SR and SRF Permanent Magnet Motors series. Designed for continuous-rotation tasks, the unit converts electrical energy into mechanical shaft power for conveyors, metering pumps, and other motion elements found in automated equipment. The motor’s standardized frame and face dimensions allow direct coupling to gear reducers and driven loads on machine frames or within suitable equipment installations.

The motor operates at a rated speed of 1750 rpm, a base velocity that matches equipment driven by a 60 Hz line frequency and simplifies mechanical ratio selection. The motor has a continuous-duty rating, allowing it to operate within its thermal limits without periodic rest intervals. A totally enclosed fan-cooled housing, identified as TEFC, protects the windings from airborne contaminants while the integral fan maintains airflow over the frame. Output torque is delivered through a shaft measuring 0.6250 in in diameter, and dimensional repeatability is maintained by a shaft tolerance of +0.0000/-0.0005 in. Installation on standard machinery is supported by the NEMA 56C mounting frame, which aligns the face pilot and bolt pattern.

The mounting face has a bolt circle measuring 5.875 in, which arranges the four tapped holes for connection to compatible devices. A pilot diameter of 4.500 in, with a tolerance of +0.000/-0.003 in, centers the motor against mating gearboxes. The threaded pattern consists of four 3/8-16 UNC-2B holes, which secure the assembly against vibration. Additional dimensions include a 3.50 in center height and a 6.50 in face diameter. A keyway measuring 0.188 × 1.38 in transmits torque without slippage. Four 0.875 in conduit openings provide entry points for electrical wiring, while two brush access covers provide access to internal components.