Product Description:

The K31SSFS-LEK-SS-02 stepper motor is built by Pacific Scientific and belongs to the K PowerPac Motors series. As a positioning device, it converts digital pulse commands from an indexer or PLC into precise shaft movement. Because it responds directly to pulse trains, the motor supports predictable incremental motion without a separate commutation device. This operating method suits equipment that needs repeatable indexing and stable holding at standstill. Typical uses include pick-and-place axes, small conveyors, or metering pumps in industrial automation cells.

Performance is supported by SIGMAX enhanced construction, which concentrates magnetic flux to increase torque density inside a 3.38 in. square frame that follows the NEMA 34 mounting footprint. Static load capacity is delivered through a holding torque of 5.9 Nm, allowing the motor to keep mechanical loads motionless when pulses stop. The stator insulation can tolerate up to 340 Vdc between windings, and the laminated rotor core helps reduce eddy-current losses during rapid microstepping. An 8-lead wire bundle allows full-coil, half-coil, or series connections to match drive voltage and current while maintaining 100 MΩ of electrical isolation. A double-ended shaft with a straight key also permits encoder installation on the rear end without additional adapters when closed-loop feedback is required. That arrangement leaves room for auxiliary feedback without changing the motor's basic mounting pattern.

The compact housing length of 94 mm results from a single magnetic stack, so inertia remains low enough for quick acceleration. Continuous service is permitted from -20°C to +40°C, covering typical unconditioned enclosure temperatures on factory floors. Positional repeatability relies on a step accuracy of ±1.5%, and each full electrical cycle advances the shaft by 1.8°. Together, these values indicate the expected indexing precision over long sequences, while the laminated rotor and SIGMAX stator help spread generated heat evenly to protect winding integrity during cyclic loading.