Bow shackle for ships

straightwith swivelchain

Overview

Anchor shackle is a heavy‑duty shackle used in stud‑link anchor chain assemblies to connect chain links, end fittings and accessories. It is supplied in several configurations (anchor shackle, D shackle, end shackle) and is intended as an end fitting or connector in vessel anchoring and mooring systems.

Product details

• The stud‑link anchor chain system: each anchor chain is composed of an anchor end chain section, a middle chain section and an end chain section.
• A complete anchor chain assembly consists of ordinary chain links, enlarged chain links, end chain links, connecting chain links or connecting shackles, swivel and end shackle.
• The anchor end link is the first link connected to the anchor; the cross‑pin of the end shackle and anchor shackle should face towards the anchor (the rounded/circular part faces the middle chain link).
• The swivel's collar should face the middle link to reduce friction and sticking; the swivel prevents excessive twisting of the anchor chain.
• Connections attaching the inside end of each anchor chain to a stiffener in the chain locker (by end shackle or connector) should withstand at least 15% of the chain's breaking load; emergency connectors should be releasable from outside the chain locker.

Technical specifications

• Product type: anchor shackle / end shackle (shown in anchor, D and end configurations).
• Application: to connect anchor to chain, join chain links and attach swivels and end fittings in stud‑link anchor chain assemblies.
• Key components and orientation: cross‑pin (must face the anchor), rounded/circular part (faces the middle chain link), swivel collar (faces the middle link).
• Required connection strength: attachments to chain‑room stiffeners should resist ≥15% of the anchor chain breaking load.
• Swivel purpose: prevents excessive twisting of the anchor chain and reduces friction when correctly oriented.

Installation & safety

• Fit the anchor end link as the first link to the anchor and ensure cross‑pins are oriented toward the anchor.
• Position the swivel so its collar faces the middle chain link to minimize wear and sticking.
• Verify end shackle and connector attachments to chain‑locker stiffeners meet the ≥15% breaking load requirement.
• Use emergency connectors that can be released from outside the chain locker to allow safe disentangling and maintenance.