Common types of rigging hardware

Shackle(rigging hardware)
Shackle is a detachable ring metal component used to connect various rope ends, eye rings, chain links and other rigging. The shackle is composed of a body and a transverse bolt. Some horizontal ties have threads and some have pins. There are two common types: straight shackles and circular shackles. Shackles are often named according to the parts used, such as anchor shackles used on anchor bolts; Chain shackle used on anchor chain; The rope head shackle used on the rope head.

hook(rigging hardware)
Hook is a tool for hanging goods or equipment, which is made of steel. The hook is divided into three parts: hook handle, hook back and hook tip.
According to the different directions of the upper eye ring of the hook handle, it is divided into front hook and side hook. The hook tip of the front hook is perpendicular to the plane of the upper eye ring of the hook handle, and the hook tip of the side hook is on the same plane with the upper eye ring of the hook handle. Common cargo hooks mostly use side hooks with deterioration.

Precautions for the use of the hook: when the hook is used, the stress shall be kept at the central part of the hook back to avoid breaking the hook; The strength of the hook is smaller than that of the shackle with the same diameter. When hanging heavy objects, the shackle shall be used to avoid straightening and breaking the hook.

Chain cable(rigging hardware)
Chain cable is a chain composed of gearless chain links. It is often used as rudder chain, cargo short chain, kilo chain, adjusting chain link of safety stable cable, etc. on board. It is also used for pulling and binding. The size of the chain cable is expressed in the diameter of the link, in millimeters (mm). Its weight can be calculated by the weight per meter of length.

When using the chain cable, the chain link shall be adjusted first to avoid transverse stress, and sudden stress shall be avoided to prevent the chain cable from breaking. The chain shall be regularly inspected and maintained to maintain good technical condition. The contact part between the chain link and the chain link and the shackle is easy to wear and rust. Pay attention to the degree of wear and corrosion. If it exceeds 1 / 10 of the original diameter, it cannot be used. Pay attention to check whether the chain is broken or cracked. During the inspection, you should not only check the appearance, but knock the chain links one by one with a hammer to listen to whether the sound is crisp and loud.

The fire impact method should be adopted to eliminate the rust of the chain cable. The expansion of the chain link after heating can make the rust brittle, and then the impact of the chain link can completely eliminate the rust and eliminate the small cracks on the chain link. The chain cable after rust removal shall be oiled for maintenance to prevent rust and reduce rust damage.