JIS F2023-76 Marine Chain Stopper – Casting Bar Type

The JIS F2023-76 marine chain stopper, often referred to as the casting-bar type chain stopper, is a critical piece of deck gear that clamps down on an anchor chain, letting crew members tighten or ease the chain under full load. Built to the rigorous specifications set out in Japanese Industrial Standard F2023-76, this stopper operates as a fail-safe mechanical brake that isolates the chain strain from the windlass while the ship remains anchored.

During anchoring, the stopper gives the crew a fixed point to hold the chain fast, blocking any backflow of force to the windlass that might otherwise over-stress the windlass motor and gearbox. Crafted from high-tensile cast steel, the rod-and-clevis assembly meshes clearly with link profiles, holding each link securely without the risk of jump or slip. Thanks to this durable design, the stopper remains reliable in heavy seas and high winds, making it suitable for a broad spectrum of vessels, from bulk carriers and tankers to offshore drilling rigs.

Picking a JIS F2023-76 chain stopper is a straightforward way to boost your ships anchoring safety and performance. Boomarine, one of China’s top marine equipment supplier, stocks a complete selection of chain stoppers. For dimensions, tech data, or pricing, please send us a message.

Dimensions of JIS F2023-76 Marine Chain Stopper (mm):

Nominal dia.	19	22	25	28	32	36
Suitable chain dia.	17-19	20-22	23-25	26~28	29~32	34-36
A	190	216	241	270	305	342
B	270	310	345	385	435	490
C	200	226	256	280	320	354
D	134	153	175	193	220	246
Weight (kg)	17	24	33	44	68	92

Features of the JIS F2023-76 Marine Chain Stopper

• Conforms to the JIS F2023-76 rule, so it matches standard chain sizes and meets class society norms.
• Heavy-duty cast build from premium alloy steel gives top strength, shock resistance, and long life even in salt water.
• Basic rod layout has few moving parts, so it stays dependable and needs little upkeep.
• Salt, spray, and heat wont harm it thanks to extra corrosion-proofing, cutting service stops and costs.
• We offer sizes for anchor chains from 16 mm to 81 mm, so you can find the fit your vessel requires.
• Pick hot-dip galvanizing or a marine-grade paint finish for surface treatment that stands up to rough seas.
• Designed for quick, safe securing and release, the stopper lets crew wheel the chain with minimal effort.
• Our marine chain stoppers can be supplied in models certified by ABS, BV, DNV-GL, LR, NK, or CCS upon request.

Applications of the JIS F2023-76 Marine Chain Stopper

• Chain fixing-locks the anchor chain in place whenever the vessel is at anchor.
• Anchor windlass load release-stops the weight of the anchor from passing to the windlass, thus prolonging the winch’s service life.
• Suitable for all ship types-often fitted to cargo ships, container vessels, offshore supply craft, naval ships, and more.
• Basic deck gear-an essential component of a vessels mooring and anchoring system, especially in harsh sea conditions.

Optional customization

• Chain size and stopper size.
• Bolt connection or welded installation type.
• Painting to meet customer colour codes.
• Stainless-steel version for extremely corrosive settings.

Why choose Boomarine as your JIS F2023-76 chain stopper supplier?

1. We operate a complete, rigorous management, production, and inspection routine that safeguards quality and catches small mistakes.
2. Incoming materials, flaw detection, and other checks are conducted stringently and confirmed by a second reviewer.
3. Our engineers or technical support team reply to every inquiry within 24 hours and can offer design assistance or practical solutions.
4. Deliver tailored solutions that match each clients specific brief.
5. Meet every deadline, thanks to a disciplined schedule and attentive monitoring.
6. Charge fair fees while maintaining courteous, expert support.

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