Series 55 Underhung Head Block
Series 55 head blocks are designed to mount to the top side of the bottom flanges of the head beams. Each rigid steel housing contains a multi-groove sheave with a standardized quantity of cable grooves and one purchase line groove. Sheaves are available in cast iron and MD Nylon.
Each assembly is fabricated to fit a specific beam size and spacing, therefore, accurate field dimensions are required when ordering. Holes are located in the base angles for the attachment of heavy offset clips and mounting bolts to the support structure.