What is a crane hook block?
hook blocks, often called crane blocks or crane bottom blocks, are below-the-hook crane lifting equipment designed for your specific application. Sheave configuration, capacity, special control requirements and unique reeving patterns can be incorporated to improve your industrial lifting equipment operation.
What is the meaning of crane hook?
A crane hook is a point of attachment on a crane designed to connect with chains and ropes attached to loads like crates, construction beams, and machinery. Hooks come in a variety of styles to meet various needs and like other parts of the crane, they are rated for loads of a specific size and type.
What are hook blocks?
“A hook block is an assembly to which the hook of a hoist or crane is attached; it typically consists of a steel enclosure housing a number of sheaves or pulleys that carry the ropes or chains that facilitate the lifting of a load.
What does it mean to two block a crane?
Two-blocking occurs when the operator extends the boom on a crane without letting out sufficient slack in the cable. As a result, the stabilizing weight, called the headache ball, will be popped off by the extending boom.
What is a jib boom?
It is a crane with a horizontal member, commonly known as the jib or boom. A jib is an operating arm that extends horizontally from the crane. The role of the jib is to support a movable hoist fixed to either a wall or pillar mounted on the floor. It is mostly used in industrial premises.
What is a headache ball on a crane?
Headache Balls, also known as overhaul hook balls, are very important devices used in a single line hoist wire rope with the purpose to add weight and help the line to drop down after coming up the crane boom and going over the sheave.
What is the hook on a chain called?
The Clasp – This part of the necklace is what keeps it all together and in tact. The fastening piece can either be a clasp, spring ring, or hook and eye fastener that keeps the chain connected.
What is a cradle hook?
The Cradle Hook provides a resting area for the handset and assist the hook switch with placing the phone on and off-hook. The thread size is 10/24. – Works with all G-style handsets – Also compatible with most Coinless / Amored telephones or Kiosk type phones. –
What are sheaves on a crane?
The sheave is a grooved wheel that is used for guiding and holding wire rope. The sheave rotates on a bearing which allows the wire rope to move freely ,minimizing the friction and wear on the rope as well as providing a smooth crane operation.
What is a load block Crane?
A Load Block is the assembly of hook, swivel, bearing, sheaves, pins and frame and is suspended by hoisting ropes or load chains. It is used to lift and move objects up to a specific lifting capacity. Visit us at our Homepage for more crane terms.
What is a bottom block assembly on a crane?
A crane’s bottom block assembly is made of critical components including the hook that is subjected to loads and stresses during each lifting cycle.
What is the difference between hoist load and load block?
Load – The total superimposed weight on the hoist load block or hook. Load Block – The assembly of hook or shackle, swivel, bearing, sheaves, sprockets, pins, and frame suspended by the hoisting rope or load chain. This shall include any appurtenances reeved in the hoisting rope or load chain.
What are the parts of a crane hoist?
Hoist – The part of the crane that lifts or lowers the load. Hoist Chain – A chain that forms part of the hoist and bears the load. Hoist Motion – The motion of the hoist when raising or lowering a load.