Pre-Assembled Cable Solutions: Why OEMs Are Outsourcing Harnessing

Pre-assembled cable harnesses eliminate on-site assembly variability, reduce commissioning time by up to 40% and provide full electrical testing with traceability documentation. Factory-assembled cables from LAPP use matched ÖLFLEX® cables and EPIC® connectors designed to work together, ensuring consistent quality that field assembly cannot match. For OEMs building industrial machinery, automation equipment and control panels, outsourcing harnessing has shifted from a cost question to a quality and speed imperative.

The economics are straightforward. Field-assembled cables tie up skilled technicians, introduce variability between units and extend commissioning schedules. Pre-assembled harnesses arrive tested and ready to install, turning cable integration from a skilled trade task into a plug-and-connect step.

What are the benefits of pre-assembled cable harnesses?

Factory-assembled harnesses address the four pain points that drive most OEMs to reconsider in-house cable assembly.

Consistent quality across every unit. Automated crimping and standardised production steps eliminate the variability inherent in manual assembly. Every harness is built to the same specification, whether it’s unit one or unit five hundred.

100% electrical testing. Each assembly undergoes continuity, insulation resistance and high-voltage testing before shipment. Test certificates ship with every order, satisfying end-customer documentation requirements without additional effort.

Full traceability. Every component in a LAPP harness is traceable from raw material to finished assembly. Regulated industries and OEMs whose customers require IEC 61439 compliance documentation depend on this level of record-keeping.

Simplified procurement. Sourcing cables, connectors, glands and assembly labour from a single partner eliminates multi-vendor coordination. One purchase order replaces four or five, and compatibility is guaranteed rather than hoped for.

The quality gap between factory and field assembly is measurable. LAPP’s production facilities use calibrated tooling with defined torque values and pull-force verification on every termination. Field assembly depends on individual technician skill, portable tools and site conditions that vary from one machine installation to the next.

How do pre-assembled cables reduce commissioning time?

Commissioning time is where pre-assembled cables deliver the most visible return. Traditional cable assembly during machine installation follows a sequential process: route cables, cut to length, strip conductors, crimp terminals, assemble connectors, then test every connection. Each step depends on the previous one, and errors compound.

Pre-assembled harnesses compress this sequence into a single step: plug in and verify. The cable arrives cut to the specified length, with connectors factory-fitted at both ends. EPIC® industrial connectors provide tool-free mating in many configurations, reducing connection time from minutes per termination to seconds per connector.

For a typical control panel with 30-50 cable connections, the difference is substantial. Manual assembly and testing might take a full shift. Pre-assembled harnesses with quick-connect interfaces can cut that to under two hours, freeing technicians for higher-value commissioning tasks like parameter setting and functional testing.

This time reduction scales with production volume. An OEM commissioning 20 machines per month reclaims hundreds of technician-hours annually. Those hours represent real cost savings, but the bigger value is shorter delivery lead times and faster time-to-revenue for each machine shipped.

ÖLFLEX® CONNECT: from single cables to complete systems

ÖLFLEX® CONNECT is LAPP’s customised cable assembly service, covering everything from simple pre-terminated cables to complex multi-branch harnesses. The service spans power, control, data and servo cable assemblies, all built from LAPP’s own component portfolio.

The assembly scope includes:

Power and control assemblies. ÖLFLEX® cables terminated with EPIC® connectors for motor feeds, power distribution and control circuits. Available with IP65/IP67/IP68-rated connectors for washdown and outdoor environments.

Servo assemblies. Matched power and encoder cable sets for drive applications, using ÖLFLEX® SERVO cables paired with compatible feedback connectors. Both cables are designed for the same drag chain environments, ensuring matched flex life.

Data and fieldbus assemblies. ETHERLINE® Ethernet cables and UNITRONIC® fieldbus cables with factory-fitted M12, RJ45 or D-sub connectors. Pre-testing guarantees signal integrity parameters that are difficult to verify with field assembly tools.

Complete harness systems. Multi-branch cable trees with routing specifications, labelling and protective conduit pre-installed. These ship as a single assembly that drops into the machine frame, eliminating individual cable routing entirely.

Every ÖLFLEX® CONNECT assembly is built from LAPP-produced cables and connectors. This vertical integration means the cable insulation, conductor material, connector housing and contact elements are all designed as a system. Mixed-vendor assemblies cannot offer this level of matched component assurance.

LAPP’s ASEAN assembly operations provide regional OEMs with shorter lead times compared to sourcing from European or Chinese contract manufacturers. Local engineering support means specifications can be refined collaboratively rather than through lengthy email chains across time zones.

When should you outsource cable assembly?

Not every application justifies outsourced harnessing. Five criteria tilt the balance toward pre-assembled solutions:

Production volume above 10 units per year. The setup cost of specifying a harness design is amortised across units. Below this threshold, custom field assembly may be more practical.

Quality documentation requirements. If end customers require test certificates, traceability records or IEC compliance documentation, factory assembly provides these as standard.

Skilled labour constraints. Trained cable assembly technicians are increasingly difficult to recruit and retain. Outsourcing transfers this dependency to a specialist partner with established training programmes.

Commissioning time pressure. When machine delivery schedules are tight and on-site time is limited, pre-assembled harnesses eliminate the longest variable in the installation process.

Multi-site consistency. OEMs with distributed installation teams benefit most from factory assembly. Every machine receives identical harnesses regardless of which field team performs the installation.

The make-versus-buy calculation often starts with direct labour cost but should include rework rates, documentation overhead, inventory carrying costs for bulk cable and connector stock and the opportunity cost of technician time spent on assembly rather than commissioning and customer handover.

Browse LAPP’s full range of cable assemblies or explore the harnessing solutions available for ASEAN OEMs.

Talk to our engineers

LAPP’s harnessing team works with OEMs from initial specification through to series production. Whether the requirement is a simple pre-terminated ÖLFLEX® cable or a complete multi-branch harness with EPIC® connectors and SKINTOP® cable glands, the process starts with a technical consultation to define the assembly scope.

Talk to our engineers about pre-assembled cable solutions for your next project.