Fiber is drawn vertically, with the preform at the top of the tower and the wind-up reels at the bottom. A multi-story tower allows the fiber to cool off before the coating is applied. Although the experiments and discussion are exclusively concerned with high temperature drawing of cylindrical glass fibers from preforms, some of the characteristics of this tech nique, and cer s. It provides an expert-curated supplier directory, buyer-focused technical background information, and structured selection criteria to support professional procurement decisions. The fiber exits the furnace at a given draw speed with a time averaged fiber diameter that. What Exactly Is a Fiber Drawing Tower and Why Is It Crucial for Cable Manufacturing? Fiber drawing tower essentials — 7-45 m furnace, 1900 °C draw speed, dual-UV coating.