McKissick QG-566 Western Cargo Hoisting Block - Wire Rope - 3/4 in - 5 Ton

Product Description

The McKissick QG-566 Western Cargo Hoisting Block is a heavy-duty wire rope block designed for mid-range cargo hoisting, marine lifting, and industrial rigging applications requiring dependable performance with 3/4 in wire rope at a 5 Ton working load limit. With a 12 in sheave outside diameter, the QG-566 is a more compact block platform than the 10 Ton 14 in and 16 in models in the McKissick Western cargo hoisting block lineup, making it well suited for smaller vessel operations, lighter cargo handling systems, and rigging configurations where a full 10 Ton block is unnecessary but a robust, load-rated wire rope block with tapered roller bearing performance is still required.

The tapered roller bearing provides the mechanical efficiency and load-handling capability that distinguishes the QG-566 from bushing or needle bearing block alternatives. Engineered to carry both radial and axial thrust loads simultaneously, the tapered roller bearing delivers consistent sheave rotation under tension, minimizes friction during wire rope travel, and maintains sheave alignment under the dynamic loading conditions common in cargo hoisting and marine rigging service. This bearing type ensures that the QG-566 performs reliably across its rated capacity range with 3/4 in wire rope in both single and multiple part line rigging configurations.

The 12 in sheave outside diameter provides an appropriate D/d ratio for 3/4 in wire rope at the 5 Ton working load limit, supporting wire rope service life by reducing bending fatigue during repeated load cycles. The QG-566 complements the higher-capacity PG-566, E-566, J-566, and QK-566 10 Ton models in McKissick's Western cargo hoisting block range, giving operators a lower-capacity option within the same proven block family for applications where a 5 Ton rating and 12 in sheave platform are the appropriate specification.

Material: Steel block body Steel sheave Tapered roller bearing

Compatible With: Wire rope up to 3/4 in diameter Standard marine and industrial rigging hardware rated to 5 Ton or greater Cargo hoisting and deck rigging assemblies on smaller vessels and shore-based lifting systems

Uses: Cargo hoisting and handling on smaller marine vessels and docks Mid-range industrial lifting and rigging operations Offshore and coastal deck operations at 5 Ton capacity Rigging systems requiring a compact, mid-capacity wire rope block with 3/4 in wire rope Applications where a 10 Ton block exceeds operational requirements

Key Features: 5 Ton rated capacity 12 in sheave outside diameter 3/4 in maximum wire rope diameter Tapered roller bearing for combined radial and axial load handling Compact sheave platform relative to 10 Ton models in the McKissick 566 lineup High mechanical efficiency under load McKissick QG-566 series Western cargo hoisting block configuration Suitable for marine, offshore, and industrial rigging applications