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Lennox 39L14 Blower Shaft 320734-701 Compatible with 2-pipe and 4-pipeThe Lennox 39L14 (also cataloged as 39L1401) is a precision engineered OEM blower shaft designed for heavy duty commercial and industrial air handling applications. Constructed from high tensile 1045 or C45 medium carbon steel, this shaft provides the necessary structural rigidity to handle the dynamic loads and high rotational speeds found in large scale HVAC systems. With a critical 1 7 16 inch diameter and a total length of 51 1 4 inches, it serves