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Aerial Roller / Pulley Block

Running out block and stringing block for stringing overhead conductors

Aerial roller, or pulley block, is made up of single or more sheaves and steel frame. The material of sheave is generally nylon or aluminum alloy, and the steel frame is galvanized or covered with coatings. Our stringing blocks are available with single sheave, three sheaves and five sheaves to fit for stringing single conductor, two or up to five bundled conductor lines. The central wheel of the pulley block can be made of cast steel to lessen the sliding abrasion wear brought on by the wire rope passing through the central wheel, therefore increasing the reliability of the stringing block in extreme cold or hot weather conditions.