K33SRFJ-LSS-NS-02 Pacific Scientific
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The Pacific Scientific K33SRFJ-LSS-NS-02 is a stepper motor from the K PowerPac Motors series with a NEMA 34, 3.38 inch square frame and a motor length of 171 millimeters. It features SIGMAX enhanced construction, a holding torque of 15.6 Newton-meters, and an 8 lead regular leadwire connection style. The motor has a step angle of 1.8 degrees, operates at temperatures from -20°C to +40°C, and has a laminated rotor design.
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Product Description:
The K33SRFJ-LSS-NS-02 is a stepper motor manufactured by Pacific Scientific within the K PowerPac Motors series. Designed for open-loop positioning and speed control, the model converts digital command pulses from a drive into fixed angular movements. This capability allows integrators to index tooling plates, track conveyor flights, or meter fluid pumps without using a feedback transducer, providing reliable incremental motion in automated machinery.
The motor follows the NEMA 34 mounting pattern, and its housing has a 3.38 in. square frame, so it aligns with standard face-mount gear reducers and brackets. Inside that envelope, a laminated rotor and three-stack stator generate a discrete step angle of 1.8°. Combined with a step accuracy of ±1.5%, this resolution lets indexing tasks hold positional error within fractions of a millimeter on short-pitch drives. For applications with higher static loads, the motor supplies 15.6 Nm of holding torque when both phases are energized. The active length of the assembly reaches 171 mm, providing the magnetic volume needed for that torque while keeping the overall package compact. Power leads exit through an eight-lead wiring harness, enabling series or parallel phase connections depending on the selected drive current.
The windings are rated for 340 VDC isolation, and resistance to ground exceeds 100 megohms, so the motor tolerates industrial drive buses without insulation breakdown. The operating temperature ranges from -20 °C to +40 °C, allowing installation in unconditioned plant areas as long as the drive manages surface temperature rise. Enhanced SIGMAX construction improves flux density at the tooth tips, while the standard winding balances current demand with thermal rise. A regular lead-wire connection style simplifies routing through flexible conduit.
