Industrial Crane Hook Block Sheave 20 Ton Hook Block

The 20 Ton Crane Hook Block Sheave is a rugged wire rope hook block assembly designed for overhead lifting and load distribution in crane and hoist systems. It guides wire rope and distributes loads across multiple reeving lines in overhead bridge cranes, gantry cranes, mobile cranes, shipyard cranes, and heavy industrial lifting equipment, making it suitable for steel mills, shipyards, manufacturing plants, ports, mining operations, and other facilities requiring reliable lifting performance. Rated at 20 tons, this hook block is built from forged or cast alloy steel and available in single or double hook configurations, with 2 to 4 sheaves depending on the reeving arrangement. The assembly accepts wire rope sizes from 1/2" to 3/4" depending on configuration, and uses either roller bearings or bronze bushings for the sheaves. Mounting is via hook block installation, with a load-rated hook that includes safety latch provisions, and the unit complies with OSHA, ASME B30 and applicable crane standards for indoor and outdoor environments. Approximate weight for complete assemblies typically ranges from 120 to 250 lbs, depending on configuration and manufacturer. Common replacements include Crosby McKissick 380 Series 20 Ton Hook Block and Johnson 20 Ton Three Sheave Hook Block; the design is compatible with Generic, Crosby, and McKissick specifications.