K43HRFK-LNK-NS-00 Pacific Scientific
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The Pacific Scientific K43HRFK-LNK-NS-00 is a stepper motor from the K PowerPac Motors series with SIGMAX enhanced construction and a heavy duty NEMA mounting type. This NEMA 42 frame motor provides a holding torque of 39.9 Nm, features an eight-lead regular leadwire connection, and has a straight key shaft design. Its operating temperature ranges from -20°C to +40°C, and it offers ±1.5% step accuracy with a 1.8° step angle.
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Product Description:
The K43HRFK-LNK-NS-00 is a stepper motor produced by Pacific Scientific within the K PowerPac Motors series. It delivers incremental rotary motion for positioning tables, conveyors, and other index-based axes in industrial automation. The motor employs SIGMAX enhanced construction to increase magnetic flux and uses a laminated rotor to reduce eddy-current losses. Its NEMA 42 frame has heavy-duty mounting holes that match common machine brackets, while a single shaft with a straight key enables direct coupling to timing pulleys or gearboxes. Connection to the drive occurs through a standard lead-wire harness, and no feedback device is required for open-loop operation.
The motor has a 4.325 in. square frame that fits legacy NEMA 42 mounting footprints. Each electrical step advances the rotor by 1.8°, providing 200 full steps per revolution for predictable indexing. Maximum static torque reaches 39.9 Nm, allowing the motor to hold heavy loads without a mechanical brake. The stator insulation is rated for 340 Vdc, providing a safety margin when the motor is paired with a modern high-bus drive. Internal windings use an eight-lead configuration, allowing the coils to be wired in series or parallel to match the available supply voltage and current. This wiring flexibility supports operation with different compatible drive arrangements while preserving the motor’s intended electrical characteristics.
The permitted operating temperature ranges from -20 °C to +40 °C, covering typical production-floor conditions without auxiliary heating or cooling. The magnetic circuit uses three stacks, increasing the axial length to 201 mm and improving torque density. Dielectric paths provide an insulation resistance of 100 megohms, which helps minimize leakage current in humid locations. Step accuracy remains within ±1.5%, supporting the indexing tolerances commonly required by pick-and-place and labeling equipment. The motor is supplied without a shaft seal, so the front bearing should be shielded when splashing fluids may be present. Proper guarding also helps prevent debris from reaching the exposed shaft interface during operation.
