Pacific Scientific K42HLHN-LNK-NS-01 Stepper Motor – Obsolete K Series Spare Part

Technical Dossier

Product Details And Specifications

Pacific Scientific K42HLHN-LNK-NS-01 Stepper Motor – Obsolete K Series Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters (phase current, holding torque, inductance) vary by winding configuration encoded in the suffix. Confirm against your original nameplate data. DriveKNMS does not publish unverified specifications.

Solving the Discontinued Hardware Crisis

The Pacific Scientific K Series was a workhorse of North American industrial automation through the 1990s. These motors were designed for long service intervals and were frequently integrated into systems with 20–30 year design lifespans — pharmaceutical filling lines, PCB drilling machines, and textile positioning equipment among them. Pacific Scientific's acquisition and subsequent product rationalization removed the K Series from active production, leaving a large installed base without an OEM supply path.

How to extend your automation asset life by 5–10 years without a platform migration:

This approach has allowed facilities in the chemical processing, automotive components, and electronics manufacturing sectors to defer platform migrations by a decade or more, redirecting capital expenditure to revenue-generating projects rather than forced infrastructure replacement.

Condition & Reliability Assurance

Sourcing discontinued motors from the secondary market carries real risk. DriveKNMS applies a 5-step inspection protocol to every K Series unit before it is offered for sale:

1. Visual and mechanical inspection. Shaft runout measurement, bearing play assessment, housing integrity check, and connector pin condition review. Units with corrosion on mating surfaces are rejected.
2. Winding resistance and insulation test. Phase-to-phase resistance balance and megohm insulation resistance test at 500V DC. Out-of-tolerance units are quarantined.
3. Electrolytic capacitor assessment (where applicable). For units with integrated electronics, capacitor ESR is measured. Age-degraded capacitors are replaced before resale.
4. Firmware and label verification. Part number suffix is cross-referenced against the physical winding configuration to confirm the unit matches the listed specification.
5. Functional run test. Where test equipment permits, the motor is energized and stepped through a defined profile to confirm smooth operation and absence of detent irregularities.

Key Features for System Maintenance

• Drop-in mechanical replacement. NEMA 42 frame dimensions are standardized. A verified K42HLHN-LNK-NS-01 installs into the existing motor mount without modification.
• No drive re-programming required. Provided the replacement unit matches the original winding suffix, existing SC Series drive parameters remain valid. Commissioning time is measured in minutes, not days.
• Avoids engineering re-qualification costs. Substituting a different motor family triggers a change control process in regulated industries (FDA, ATEX, ISO-certified lines). A like-for-like replacement does not.
• Preserves validated process parameters. In pharmaceutical and food processing environments, a platform change requires re-validation. A spare K42HLHN-LNK-NS-01 keeps the validated state intact.

How do I confirm the unit is genuine and not a counterfeit?
Pacific Scientific K Series motors carry cast or stamped part numbers on the motor body, not adhesive labels. DriveKNMS provides high-resolution photographs of the nameplate and connector before dispatch review. Serial number traceability documentation is provided where available.

Can you source other Pacific Scientific K Series variants?
Yes. Contact us with your full part number including suffix. We maintain sourcing relationships across the K Series frame range.