Product Description:

The K33SRFJ-LSS-N2-02 is a stepper motor produced by Pacific Scientific within the K PowerPac Motors series. Designed for incremental motion in indexing tables, packaging axes, and other open-loop positioning tasks, the unit converts digital pulse trains from a drive into precise shaft rotation without feedback devices. That operating method suits machinery that relies on commanded step counts rather than encoder correction, provided the application stays within the motor’s available torque margin. Pacific Scientific applies its SIGMAX enhanced magnetic construction to this model to raise torque density, and the laminated rotor works with the standard winding set to provide stable detent behavior during repeated indexing moves.

The motor mounts on a NEMA 34 face, and its 3.38-inch square frame fits common American mechanical layouts. Inside the three-stack stator, the enhanced magnetic path raises flux so rated holding torque reaches 15.6 Nm without increasing the housing size. Each commanded step advances the shaft by 1.8°, and cumulative positioning error is limited to ±1.5%, which helps maintain repeatable travel in conveyor metering and labeling equipment. A laminated rotor reduces eddy-current losses, and the standard winding set withstands an insulation potential of 340 Vdc for use with high-voltage microstepping drives. The regular lead-wire connection style also avoids separate connector hardware at the motor body.

Insulation resistance measures 100 Megohms when tested at ambient temperature, which helps limit leakage current in humid indoor environments. The motor is rated for continuous duty from -20 °C to +40 °C, allowing the same unit to serve in cold-room indexers and general packaging equipment. Its body length is 171 mm, and the motor uses an 8-lead arrangement so the phases can be wired in series or parallel to match different drive requirements. Low rotor inertia supports quick starts and stops during short indexing cycles without changing the motor’s basic mounting format.