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How to strip the outer sheath of a 4-core optical cable

How to strip the outer sheath of a 4-core optical cable

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Use a proper fiber optic sheath stripper to carefully remove the outer jacket without damaging the internal fibers.

Tools Required

  • Fiber optic jacket stripper: Designed for 2–4 microcables, adjustable for different diameters (4.5–40mm) and ensures clean cuts without harming fibers .
  • Kevlar scissors: For cutting strength members like aramid yarn.
  • Lint-free cloth and isopropyl alcohol: For cleaning fibers after stripping .
  • Optional needle-nose pliers: To assist in removing the sheath after cutting .

Step-by-Step Procedure

  1. Measure and mark the length of the outer sheath to be removed according to your installation or connectorization requirements .
  2. Set the stripper blade depth to match the cable diameter, ensuring it cuts only the outer jacket and not the inner fibers .
  3. Place the cable in the stripper slot and hold it perpendicular to the tool. For circular or tight-jacket cables, a helical or spiral cut may be used for midspan stripping .
  4. Rotate the tool around the cable to score the sheath completely. For longitudinal strippers, pull the tool along the cable length to cut the jacket .
  5. Remove the outer sheath carefully by hand or with pliers, exposing the aramid yarn and buffered fibers underneath .
  6. Trim the aramid yarn with Kevlar scissors to prevent interference with connectorization .
  7. Clean the exposed fibers with a lint-free cloth soaked in isopropyl alcohol to remove any residue .

Safety Considerations

  • Avoid bending or pulling fibers excessively, as this can cause micro-cracks or breakage .
  • Never look directly into fiber ends if the cable is connected to a laser source, as invisible laser light can damage the retina .
  • Wear protective gloves and eyewear when handling chemicals or cutting fibers .

Best Practices

  • Strip each layer progressively: first the outer jacket, then aramid yarn, and finally the buffer coating if needed .
  • Keep stripping tools sharp and properly maintained to ensure clean cuts and prevent fiber damage .
  • For midspan or tight installations, consider using a sheath stripper with adjustable blade depth and helical cutting action for efficiency . By following these steps and using the correct tools, you can safely and efficiently strip the outer sheath of a 4-core optical cable while preserving the integrity of the internal fibers.
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