Description
Kollmorgen E33NCHA-LNN-NS-00 | Pacific Scientific Step Motor, In Stock
Architect’s Product Breakdown
The Kollmorgen (Pacific Scientific) E33NCHA-LNN-NS-00 operates as a rugged, high-torque hybrid stepping motor engineered for heavy-duty industrial motion control applications. Falling under the legacy Pacific Scientific E-Series / Powermax lineage (now integrated into Kollmorgen’s historical motion portfolio), this motor combines optimized magnetic circuits with robust mechanical construction to provide exceptional holding torque and step accuracy. It is widely utilized in high-precision legacy systems such as semiconductor manufacturing tools, medical automation, CNC positioning stages, and industrial indexing machinery.
Because this motor series is long out of production, matching the exact part number string (E33NCHA-LNN-NS-00) is crucial for maintenance replacements. The nomenclature maps out the NEMA frame size, stack length, winding configuration, and specialized encoder/shaft options. Swapping this unit requires verifying the microstepping drive’s phase current limits and matching the winding sequence to avoid torque loss or motor stalling.
E33NCHA-LNN-NS-00
Key Technical Specifications
| Parameter | Specification |
| Series | Pacific Scientific E-Series / Powermax II Hybrid Stepper |
| Model / Part Number | E33NCHA-LNN-NS-00 |
| Frame Size | NEMA 34 (approx. 3.4-inch flange profile) |
| Rotor Stack Length | 3-stack configuration (optimized for maximum torque density) |
| Step Resolution | 1.8° standard step angle (0.9° half-step) |
| Winding & Electrical | Low-loss copper winding optimized for industrial microstepping drives |
| Shaft Configuration | Precision steel shaft (standard industrial tolerances) |
| Operating Environment | Standard industrial temperature ranges (convection cooled) |
Field Engineer’s Pitfall Guide
- WARNING: Mismatched Phase Wiring. Connecting the motor phase leads incorrectly during installation will cause erratic jitter, reverse rotation, or complete failure to step when energized by the driver.
- WARNING: Thermal Overload via Excessive Current. Driving this motor with a microstepping controller configured above its maximum rated phase current will overheat the stator windings and degrade internal insulation prematurely.
- WARNING: Mechanical Side-Load Stress. Applying excessive radial or axial force via poorly aligned belt drives or gearboxes can accelerate bearing wear and cause rotor-stator rub.
- Field Anecdote: I remember an automated indexing table intermittently stalling under heavy load because a replacement NEMA 34 motor was wired using an incorrect phase sequence, causing the drive to throw an overcurrent fault due to immediate mechanical opposition.
QA & Testing SOP
- Visual & Origin Verification: Inspect the motor housing, bearings, flange face, and lead wires for mechanical damage, corrosion, or insulation wear, and verify original Kollmorgen/Pacific Scientific factory labels.
- Live Test Bench Environment: Mount the motor onto a calibrated dynamometer test stand coupled to a regulated microstepping drive.
- Electrical & Performance Testing: Measure phase-to-phase winding resistance for balance, perform an insulation breakdown (megger) test, and execute speed-torque profile sweeps to verify smooth operation.
- Anti-Static & Secure Packaging: Enclose the unit in heavy-duty packaging with custom structural foam cushioning to prevent impact damage to the shaft and lead wires during transit.
Technical FAQ
Can the E33NCHA-LNN-NS-00 be driven by modern third-party microstepping drives?
Yes, as long as the modern drive can be configured to match the motor’s voltage, inductance, and rated phase current limits.
Does this motor include an integrated encoder for closed-loop feedback?
No. The configuration code designates a standard open-loop step motor variant without an integrated optical or magnetic encoder.
What causes a stepping motor to vibrate violently without turning?
Vibration without rotation typically points to a “dropped phase”—meaning one of the motor windings is disconnected, open-circuited, or wired incorrectly to the drive.
Is this motor still actively manufactured by Kollmorgen?
No. The E-Series is obsolete, making verified new-surplus inventory and professional repair/rewind services the standard paths for replacement.
