In the world of electrical engineering and industrial installations, a cable gland (or passacavi) might seem like a simple component. However, these parts are the unsung heroes of safety, ensuring that enclosures remain watertight and cables are protected from strain.
When dealing with high-volume production, even a minor thread anomaly can lead to catastrophic failures in the field, resulting in costly recalls or damage to your brand’s reputation. At Ready Metrology, we are redefining how these components are inspected using the coreX Industrial CT scanner.
To understand why inspection is critical, we must look at how cable glands are manufactured. The production process involves precision engineering across multiple stages:
Injection Molding (Nylon/Polyamide): Most cable glands are made from Polyamide (Nylon PA6 or PA6.6), often reinforced with glass fiber. During the process, molten plastic is injected into steel molds at 250-300°C. If the cooling time or pressure isn’t perfect, the internal and external threads can suffer from shrinkage or deformation.
Gasket Production: Internal seals made of Neoprene, EPDM, or Silicone are produced via compression molding or extrusion. These must fit perfectly within the body to ensure the IP (Ingress Protection) rating.
Final Assembly: The body, the “slat” inserts, the gaskets, and the dome nuts are assembled. Once assembled, inspecting the internal alignment of these parts becomes impossible with traditional methods.
A frequent issue in cable gland production is the thread anomaly. Whether it’s a “short shot” in the mold, flash, or dimensional warping, a faulty thread might still allow the nut to close but will fail under mechanical stress or vibration in the final application.
Traditional tactile probes or optical scanners often struggle with:
Internal threads that are hard to reach.
The transparency or translucency of certain plastics.
The need to destroy the part to see the internal fit.
This is where coreX by Ready Metrology changes the game. Our Industrial CT technology allows for a complete, non-destructive internal inspection of the cable gland in seconds.
Speed of Inspection: CoreX is designed for the reality of high-volume manufacturing. It provides rapid data acquisition, making it feasible to monitor production batches in near real-time.
Simplicity of Use: With a “one-button” interface, operators can trigger a scan and receive automated measurements. You don’t need to be a radiologist to get professional metrology results.
Internal Analysis: CoreX sees through the assembly. It measures the thread pitch, the compression of the internal gasket, and the integrity of the wall thickness simultaneously.
For components like cable glands, where the unit value is relatively low but the volume is massive, the “cost of failure” is the true metric to watch. If a non-conforming batch reaches a customer, the damage to your reputation and the potential liability of a field failure far outweigh the cost of inspection.
By integrating coreX into your quality workflow, you ensure that every component—no matter how simple—meets the highest standards of excellence.
Ready to see inside your production? Contact Ready Metrology today to learn how coreX can optimize your quality control process for cable glands and other complex assemblies.
