Product Description:

The K31HCHJ-LNK-NS-01 is a stepper motor manufactured by Pacific Scientific within the K PowerPac Motors series. Designed for incremental motion control, it advances a load by a fixed step each time the drive issues a pulse, making it suitable for indexing tables, small presses, and pick-and-place axes. The unit uses enhanced SIGMAX construction to increase flux and torque without enlarging the package, and its heavy-duty NEMA flange simplifies installation on machinery that already accepts NEMA-framed motors, minimizing mechanical adaptation.

The stator lamination stack is sized to the NEMA 34 format and measures 3.38 inches square, giving consistent mounting holes and pilot diameters for NEMA-compliant gearheads. At rated current, the motor develops 5.9 Nm of holding torque, which is enough to restrain moderate loads without active servo feedback. Overall length is only 94 mm, so the unit fits shallow cabinets even with its single-stack magnetic circuit. Electrical insulation is rated for up to 340 Vdc, and insulation resistance exceeds 100 Megohms, providing a safety margin when the drive uses high bus voltages. A 4-lead parallel winding reduces phase resistance and enables higher current operation from standard micro-stepping drives.

The motor can operate in ambient temperatures from -20 °C to +40 °C, allowing cold-room startup and continuous service in lightly heated enclosures. The rotor is laminated to limit eddy-current losses, and the magnetic assembly uses one stack to preserve dynamic response. Each step advances the shaft by 1.8°, and positional deviation between commands stays within ±1.5%, which suits general-purpose indexing tasks. Power and phase conductors terminate on a System MS connector. This sealed plug, together with a shaft seal around the single straight-key shaft, helps maintain internal cleanliness. A standard winding and a four-lead parallel arrangement support open-loop operation without an encoder.