Stringing blocks are meticulously designed to protect conductors by:

• Smooth Surfaces: The inner grooves of the sheaves are typically lined with a durable, low-friction material like high-grade nylon, polyurethane, or aluminum alloy. This smooth surface minimizes abrasion and scratching on the conductor's outer strands.

• Appropriate Diameter: Blocks are sized correctly for the conductor diameter to ensure the conductor sits securely within the groove and avoids excessive bending, which can lead to stress points or deformation.

• Robust Bearings: High-quality, sealed ball bearings ensure the sheave rotates freely with minimal friction, reducing the pulling force required and preventing localized heating or wear on the conductor.

• Proper Alignment: When installed correctly on towers, stringing blocks guide the conductor smoothly along the line, preventing kinks or sharp angles that could cause damage.

• Bundle Configurations: For bundled conductors, specialized multi-groove blocks ensure each sub-conductor is adequately supported and spaced, preventing inter-conductor abrasion.