How to remove the outer sheath of optical fiber cables

Use a combination of marking, ring-cutting, and specialized stripping tools to safely remove the outer sheath without damaging the fiber core.

Tools and Materials Needed

• Fiber optic cable stripper or sheath knife (e.g., Jonard JIC-4366)
• Needle-nose pliers or tweezers
• Tape for collecting fiber fragments
• Safety glasses and gloves
• Measuring tape or marker for sheath length

Step-by-Step Procedure

1. Measure and Mark the Sheath Determine the length of the outer sheath to remove, typically 6 inches to 2 meters depending on installation requirements. Mark the circumference of the cable at the desired distance using a marker or tape to guide the ring cut . 2. Perform a Ring Cut Using a sheath knife or cable stripper, carefully score the outer sheath around the cable at the marked point. For tools like the Jonard JIC-4366, adjust the blade to the cable thickness and rotate the tool around the cable until the sheath is cut through . Avoid cutting too deeply to prevent damage to the ripcord, strength members, or fiber core . 3. Flex and Remove the Sheath Gently bend the cable at the ring cut to separate the sheath. Pull the cut section away from the cable to expose the ripcord and cable core. Use the ripcord to assist in splitting the sheath along the cable length if needed . 4. Handle the Cable Core Once the outer sheath is removed, the cable core, including buffer tubes and central strength members, will be exposed. Cut and remove any flame barrier tape, water-absorbent tape, or outer strength members carefully, leaving binder strings intact until further preparation . 5. Clean Up and Safety Collect any small fiber fragments using tape or tweezers to prevent injury. Always wear safety glasses to protect your eyes from sharp fiber shards, and avoid excessive bending, pulling, or crushing of the cable .

Tips and Best Practices

• Use the correct tool for the cable type and diameter to ensure a clean cut .
• Avoid applying excessive force; let the blade do the work.
• Maintain a clean workspace to prevent fiber fragments from causing injury.
• Follow manufacturer-specific instructions for midspan or end access, as procedures may vary for loose tube, tight buffer, or ribbon cables . By following these steps and using the appropriate tools, you can safely remove the outer sheath of optical fiber cables while preserving the integrity of the fibers for splicing or termination.