Special pulley for pulling optical cables

Fiber optic cables should be pulled using specialized pulleys and tools that protect the cable's strength member and maintain proper tension.

Types of Pulleys for Fiber Optic Cables

Manual Cable Pulleys: These are simple, low-cost pulleys suitable for short runs or low-tension applications. They often feature smooth sheaves to reduce friction and prevent cable damage. Examples include low-voltage network cable pulleys for Cat5e, Cat6, coax, and fire alarm cables, which can also be used for optical cables in small installations.

Electric and Gas-

Powered Pullers: For longer or underground fiber optic installations, powered pullers like the GMP SideWinder or TUF-Lugger Lite provide controlled pulling force. These units use capstans or winches to maintain consistent tension, preventing overstretching of the fiber. They often include adjustable tension limits, remote controls, and portability features.

Hydraulic Pullers: Condux fiber optic pullers use hydraulic motors with variable speed and adjustable pressure relief valves. These are ideal for industrial or large-scale installations where precise control over pulling force is critical.

Best Practices for Pulling Fiber Optic Cables

Use the Strength Member: Fiber optic cables have internal Kevlar or aramid yarns that provide tensile strength. Always pull the cable by the strength member rather than the outer jacket to prevent stretching or damage. Pulling Eyes and Socks: Tools like the Cleerline SSF-PULLEYED and SSF-PULLEYEM are designed to attach to the cable's strength member.

They reduce twisting, distribute tension evenly, and can be reused for multiple pulls. Sheave Size and Bend Radius: Ensure the pulley or sheave diameter meets the minimum bend radius of the fiber optic cable. Common sheave sizes range from 9” to 40” depending on cable type and installation requirements.

Tension Control: Use pulleys or pullers with adjustable tension to avoid exceeding the cable's rated pull strength, typically 200+ pounds for standard fiber optic cables.

Where to Find Pulleys

Amazon offers a variety of wire and cable pulleys suitable for low-voltage and network cables, which can be adapted for fiber optic use. McMaster-Carr provides a wide selection of cable pulleys, including mounted, hanging, and standard types, allowing you to calculate capacity based on rope angle and load. Specialized Fiber Optic Pullers are available from suppliers like Linemen-Tools.com, offering electric, gas, and hydraulic options for professional installations.

Using the right pulley and following proper pulling techniques ensures fiber optic cables are installed safely, maintain performance, and avoid costly damage.