

POWERPAC® K and N Series Stepper Motors
POWERPAC® hybrid stepper motors deliver more power in a smaller package. These rugged NEMA 34 and 42 (90 and 110 mm) motors combine optimal magnetics in a housingless frame with a large diameter rotor and innovative rotor-stator design to produce more torque and smoother microstepping. The K Series incorporates flux-focusing SIGMAX® technology for higher acceleration with 25 percent more torque.

Features
- Wide range of standard options
- Affordable co-engineered modifications with a short lead time to meet unique application 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 2,180 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 2,790 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 (1,150 to 4,365 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 (1,470 to 5,700 oz-in) nominal holding torque.
- Extensive selection of shaft configurations, terminations, windings and co-engineered modifications to suit your application needs, time frame and budget
- Speeds up to 3,000 rpm meet the velocity demands of most high-torque applications
- Improved torque linearity (above rated current) provides high peak torque to boost acceleration in intermittent-duty applications
- High torque at moderate speeds to enable a cost-effective alternative to servo motors
- Low detent torque harmonic provides smoother microstepping performance
- K Series incorporates SIGMAX® technology for 25% more torque than N Series
- Runs cooler than comparable steppers to provide longer, more reliable motor life
- Special rotor design enables high acceleration
- Rugged, “housingless” square frame means more torque in a smaller package
- IP65 sealing for splashproof protection
- Two-phase design is compatible with most drives and provides smoother microstepping and lower power input versus three-phase motors
- Optional encoder mounting provisions
Media & Downloads
Title | File Language | Date | Share URL |
---|---|---|---|
POWERPAC Installation bulletin en-EN | English | |
Share URL /sites/default/files/public_downloads/POWERPAC_Installation_bulletin_en-EN_RevA.pdf |
Nema 34 N3 K3 Stepper Systems TB | English | |
Share URL /sites/default/files/public_downloads/Nema_34_N3_K3_Stepper_Systems_TB.pdf |
Nema 42 N4 K4 Stepper Systems TB | English | |
Share URL /sites/default/files/public_downloads/Nema_42_N4_K4_Stepper_Systems_TB.pdf |
Title | Language | Date | Share URL |
---|---|---|---|
Kollmorgen Catalogo Automazione e Motion Control IT | Italian | Share URLview | |
Kollmorgen Automation and Motion Control | English | Share URLview | |
Kollmorgen Optimized Solutions and Special Duty Motors | English | Share URLview | |
Kollmorgen otomasyon ve hareket kontrol çözümleri kataloğu TR | Turkish | Share URLview | |
Stepper and Synchronous Motors Catalog EN Rev C | English | Share URLview | |
科尔摩根运动控制及伺服系统解决方案 | Chinese, Simplified | Share URLview |
These 3D models are intended to guide your design activities and may be used as reference information. Be sure to consult a Kollmorgen expert to ensure you have the most current and accurate information for critical aspects of design work.
Title | File Language | Date | Share URL |
---|---|---|---|
3D/2D Models for PowerPAC | English | |
Share URL https://webassistants.partcommunity.com/23d-libs/kollmorgen/assistant/pcomm.html?series=powerpac |
Title | File Language | Date | Share URL |
---|---|---|---|
Blue Guide | English, German | |
Share URL https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=OJ%3AC%3A2022%3A247%3ATOC |
CEL China Efficiency Labelling for Servo and Stepper Motors | English | |
Share URL /sites/default/files/public_downloads/CEL%20Technical%20Notice%20on%20Efficiency%20for%20Servo%20and%20Stepper%20Motors.pdf |
Kollmorgen CE Technical Notice - Servo and Stepper Motors Efficiency | English | |
Share URL /sites/default/files/public_downloads/Kollmorgen%20CE%20Technical%20Notice%20-%20Servo%20and%20Stepper%20Motors%20Efficiency.pdf |
Kollmorgen EU Declaration of Conformity PowerPac K-N-SN | English | |
Share URL /sites/default/files/public_downloads/Kollmorgen%20EU%20Declaration%20of%20Conformity%20PowerPac%20K-N-SN.pdf |
Support
Trade Compliance | ![]() |
February 21, 2023 |
Ingress Protection of Servo Motors | ![]() |
April 18, 2019 |
Normen und Richtlinien | ![]() |
May 10, 2017 |

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