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    When Setting up Your Process and Determining How Much Epoxy to Dispense Into a Ferrule, How to Be Sure You Have the Proper Fill Inside the Ferrule

    by:
    EPOXY: Ask FOC Ask FOC
    Published: August 13, 2018
    , Last updated: September 18, 2025

    QUESTION: When you’re setting up your process and determining how much epoxy to dispense into a ferrule, how can you be sure you have the proper fill inside the ferrule?

     

    ANSWER:

    Here’s a simple tip: Use a scrap piece of 900-micron cable as a dipstick (just as you would use a dipstick to check the oil in a car). Follow these steps:

    1. Inject epoxy according to your procedure.

    2. Take a 900-micron cable and push it all the way into the ferrule until it bottoms out on the rear of the ceramic ferrule. (Note: The cable is not stripped. We’re not concerned with inserting fiber into the ferrule bore, just a piece of 900-micron cable.)

    3. Remove the dipstick, which will be wetted with epoxy.

    4. Check to see if you have the desired 2mm to 3mm of wetness on the cable. If you have more than this, you risk overfilling the ferrule. If you have less, the risk is underfilling.

     

    READ THE FULL BLOG ARTICLE HERE: Bonding Optical Fiber to the Ceramic Ferrule Part 1: Best practices for epoxy preparation and dispensing

     

     

    ADDITIONAL CONTENT & RESOURCES:

     

     

      Answered by AskFOC Technical Team August 31, 2018

     

     

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    © 2018 Fiber Optic Center, Inc. Article Title: When Setting up Your Process and Determining How Much Epoxy to Dispense Into a Ferrule, How to Be Sure You Have the Proper Fill Inside the Ferrule Author: FOC FAQ Published: August 13, 2018

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    About the Author
    FOC FAQ Fiber Optic Center has a team of technical experts and marketing strategists with decades of years in the field. This team contributes to the fiber, cable and specialty industries coverage through news, alerts, reports and general media information.
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    About Fiber Optic Center, Inc.
    Fiber Optic Center, Inc., (FOC), is an international leader in distributing fiber optic components, equipment, materials, and supplies known for helping customers make the best cable assemblies in the world for over three decades. Material property consultation is provided by technical experts for lapping film, epoxy, adhesives, optical coatings, and optical plastics during application specific material selection. Technical process expertise is offered in several key technology areas. Specialized expertise includes cable assembly line mastery, fiber broadband field installation best practices, and technical advancements in telecom, datacom, data centers, and hyperscale. Optical cable specification development includes design and quality testing. FOC's impact reaches the network physical capabilities through fiber manufacturing process expertise from preform fabrication and shaping, fiber drawing, and coating requirements for double clad fibers used for high power fiber laser applications to solution doping, vapor phase doping, rare earth chelates and halide recipe consultation. Fiber Optic Center is the preferred choice for the world’s fiber professionals as the industry connection to the most innovative optical products, technologies and technical experts who integrate their manufacturing knowledge and vast experience into customers' worldwide operations. @FiberOpticCntr

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