POWERPAC K and N Series
Pacific Scientific POWERPAC® N3, N4, K3, and K4 Series Hybrid Step Motors deliver more power in a smaller package. These rugged NEMA 34 and 42 (90 and 110 mm) frame motors provide among the highest torques per frame size in the industry. Optimal magnetics in a housingless frame combine with a large diameter rotor and new rotor-stator design to produce more torque, high acceleration, cooler running, and smoother microstepping. The K Series, which incorporates flux-focusing SIGMAX® technology, provides the highest acceleration rates and 25% more torque. Both the N and K Series are available with combinations of standard options to meet your specific requirements.
- N3 models, NEMA 34 (90 mm) motors are available in 4 stack lengths with torque ratings from 3.2 to 15.4 N-m (454 to 2180 oz-in) nominal holding torque.
- K3 models, NEMA 34 (90 mm) motors are available in 4 stack lengths with torque ratings from 4.08 to 19.7 N-m (578 to 2790 oz-in) nominal holding torque.
- N4 models, NEMA 42 (110 mm) motors are available in 3 stack lengths with torque ratings from 8.12 to 30.8 N-m (1150 to 4365 oz-in) nominal holding torque.
- K4 models, NEMA 42 (110 mm) motors are available in 3 stack lengths with torque ratings from 10.4 to 40.3 N-m (1470 to 5700 oz-in) nominal holding torque.
- Speeds up to 3000 RPM provide for velocity demands of most high torque applications.

