Techniques for stripping the outer sheath of a 4-core optical cable

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

Measure and mark the length of the outer sheath to be removed according to your installation or connectorization requirements. Set the stripper blade depth to match the cable diameter, ensuring it cuts only the outer jacket and not the inner fibers. 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. 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.

Remove the outer sheath carefully by hand or with pliers, exposing the aramid yarn and buffered fibers underneath. Trim the aramid yarn with Kevlar scissors to prevent interference with connectorization. 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.