Preventing damage to sensitive conductors like OPGW (Optical Ground Wire) and HTLS (High-Temperature Low-Sag) is a top priority, and accessories are specifically designed for this:

• Specialized Sheave Linings: Stringing blocks for OPGW and HTLS conductors feature highly optimized linings. These are typically made from non-abrasive, low-friction materials such as high-molecular weight polyethylene (HMWPE), polyurethane, or specific aluminum alloys, which cradle the conductor gently, minimizing surface wear and crushing.

• Large Sheave Diameters: For these sensitive and often large-diameter conductors, stringing blocks are designed with significantly larger sheave (wheel) diameters. A larger diameter reduces the bending radius of the conductor as it passes over the sheave, minimizing stress on the internal optical fibers (in OPGW) or the composite core (in HTLS).

• Anti-Twist Swivels: As mentioned, these are critical for OPGW, ensuring that no rotational forces are transferred to the cable, which could otherwise damage the delicate optical fibers.

• Precision Pulling Grips: OPGW-specific pulling grips are longer and have a finer, more flexible weave to distribute the pulling force over a greater surface area, ensuring a secure grip without localized pressure points that could crush the cable.

• Careful Material Selection: All components that come into contact with the conductor are made from materials that will not abrade, scratch, or chemically react with the conductor's outer layer.

• Integrated Design with Machines: The accessories are designed to work seamlessly with modern tension stringing machines, where precise control of tension and speed further reduces the risk of conductor damage.