The focus for "stringing blocks" (sheaves) and "aerial rollers" is on material science and design to ensure smooth conductor passage and prevent damage:

• Lightweight Composite Materials: Moving beyond traditional steel or aluminum, many modern blocks feature high-strength, lightweight composite materials (e.g., nylon, polyurethane-lined aluminum alloy). These materials are gentler on conductors, especially sensitive ones like OPGW or ACCC, reducing surface abrasion and potential damage.

• Optimized Groove Designs: Grooves are precisely engineered to fit specific conductor diameters and types (e.g., single, twin, triple bundles), ensuring full support and minimizing contact stress.

• High-Quality Bearings: Sealed, low-friction bearings provide incredibly smooth rotation, reducing pulling force requirements and preventing jerking motions that could damage conductors.

• Quick-Release Mechanisms: For faster and safer conductor insertion and removal.

• Anti-Jump Guards: To prevent conductors from jumping out of the sheave during dynamic operations.