Hook Block

The hook block is the point where the crane meets the load. It hangs from the hoist rope and carries the hook, pulley block and safety latch.

Construction

A forged or fabricated hook with a spring-loaded safety latch, mounted on a pulley block that reeves the hoist rope and, on larger blocks, includes a swivel and weight for a clean fall.

Role on the crane

The block multiplies the hoist rope's lifting force through reeving and provides the connection point for slings and lifting gear. It is a high-wear, safety-critical part.

Inspection and maintenance

• Inspect the hook for throat opening, wear, cracks and deformation before each shift; check the safety latch operates freely.
• Check the swivel, sheaves and rope fittings for wear and correct reeving.
• Replace any hook that has been overloaded, cracked or worn beyond the maker's limit.

Note: image is a shipment / delivery photo, shown for reference; the delivered component is manufactured to the crane maker's drawing and specification.