Series 53 Underhung Head Block
Series 53 head blocks are designed to clamp to the bottom of a steel beam. 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. Mounting holes are generally located such that the sheave is positioned centered under the support beam. Heavy offset clips and bolts are supplied for attachment to the support structure. Beam flange width and thickness must be specified at time of ordering.