Type A Swivel Shackle

Shortest Possible Connector from Anchor to Chain

The OLIPORTS Type A Swivel Shackle is specifically designed for direct connection between the anchor shank and the anchor chain. Its opening width and pin diameter are precisely matched to the anchor stock dimensions, enabling a more compact and secure connection.

Compared to traditional anchor chain connection structures, the Type A Swivel Shackle eliminates unnecessary intermediate links, allowing the anchor head to be retrieved more smoothly into the hawse pipe while effectively saving deck space.

This design achieves the “shortest possible connection from anchor to chain,” improving anchoring efficiency and significantly reducing chain twisting during operation.

Technical specifications of Type A Swivel Shackle

Features	Standard & Specifications
Model	Swivel Shackle Type A
Material	Forged Steel or Cast Steel
Grade	Grade 2 & Grade 3
Nominal Diameter	22mm to 117mm
Weight	7.6kg to 1830kg
Surface	Black Painted, Hot Dip Galvanized
Certificate	CCS,ABS, BV, DNV, KR, NK,RINA etc.
Application	Anchor chain connection; windlass systems; offshore anchor handling; mooring systems;
Catageory	anchor chain system; offshore mooring; marine deck equipment;

Key Features of Type A Swivel Shackle

Design Features: It is characterized by one end being larger than the other. The larger end is connected directly to the anchor shank via a pin, while the smaller end is connected to the end of the anchor chain via a rotating mechanism.

Connection method: Anchor -> Type-A swivel shackle -> Chain link. By eliminating the intermediate link, the anchor head can be retracted more tightly into the ship’s hawse pipe.

Full rotation: Rotates freely 360°, completely eliminating the problem of anchor chain tangles

High-Strength Monoblock Forging: The alloy steel body is manufactured using a monoblock forging process, ensuring that the breaking load is perfectly matched to the corresponding anchor chain grade.Materials and Surface Treatment: Forged alloy steel and cast steel components; hot-dip galvanizing available upon customer request.

Looking for swivel shackles that offer greater strength, smoother rotation, or enhanced corrosion resistance? OLIPORTS can provide customized manufacturing solutions tailored to your offshore operating environment.

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Type A Swivel Shackle Specifications and Sizes

Chain Dia. (mm)	L	B	B1	b	b1	R	R1	d3	l3	d1(Gr2)	d1(Gr3)	d2	l1	l2
22-24	377	143	94	80	34	48	37.5	M36	34	58	60	31	140	61.5
26-28	442	162	116	87	39	58	47	M42	39	62	68	36	157	73
34-36-38	552	218	148	101	53	74	58	M56	53	76	82	49	185	94
44-46-48	700	277	196	123	67	98	75	M76	67	90	98	62	235	118
54-56	802	322	218	146	78	109	88	M90	92	102	110	73	258	135
97-100-102	1448	571	412	210	143	206	146	M165	143	156	168	133	440	253
120-122	1756	705	488	268	175	250	200	M190	175	190	190	165	510	284
137	1972	795	548	300	200	285	225	M210	200	210	210	185	575	319
142	2044	825	568	310	205	295	235	M215	205	215	215	190	595	330
157	2260	910	628	345	225	325	260	M235	220	235	235	210	660	365
162	2332	940	648	355	235	235	270	M240	230	240	240	218	680	377

The data presented in the table above represents only a selection of specifications for Type A Swivel Shackles. OLIPORTS can provide additional sizes, breaking loads, custom designs, and the Marine Swivel Shackle Technical Data Sheet based on your anchor chain system requirements. Please feel free to contact our team for complete specifications and engineering support.

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Applications of Type A Swivel Shackle

OLIPORTS Type A swivel shackles are suitable for:

Anchor chain connection systems for all types of vessels
Anchor winch systems and anchor handling equipment
Offshore anchor handling operations
Mooring systems for ships, barges, and offshore platforms
Heavy-duty lifting applications in marine and industrial environments

FAQ

How to use anchor shackle?

Anchor shackles are used to connect the anchor to the anchor chain; the pin must be properly secured and must match the chain diameter and the size of the anchor shank.

Can Type A swivel shackles be customized?

Yes. OLIPORTS offers customization options for dimensions, material grades, surface finishes, and third-party certifications.

How do I select the correct A-type swivel shackle size for my anchor system

Three key parameters must be considered when selecting a model:
1. Anchor shank pin diameter: The bore diameter at the large end of Type A must match the anchor pin hole, with a tolerance grade of H9/f7.
2. Anchor chain grade and diameter: The rotating mechanism at the small end must be compatible with the size and material grade of your anchor chain retaining ring.
3. Working Load Limit (WLL): Ensure the shackle’s WLL is ≥ 1.25× the maximum anticipated dynamic load (per IACS guidelines).

OLIPORTS offers a free online selection tool and engineering consultation to help you verify the accuracy of your selection based on classification society regulations and operating conditions.

How does a Type A swivel shackle help in saving deck space?

The main difference lies in the connecting ends. Type A swivel shackles have a wider opening at one end, designed specifically for direct connection to an anchor shank, making them the shortest link between the anchor and the anchor chain. Type B swivel shackles, on the other hand, typically have the same structure at both ends and are used to connect chain links together.

Can OLIPORTS supply the Type A with custom pin designs, non-standard jaw openings, or specific class notations?

Absolutely. As a manufacturer, OLIPORTS frequently delivers customized solutions: replacing standard split pins with bolt pins, machining extra-wide openings for non-standard shanks, and providing certifications bearing specific classification society marks such as ABS, DNV, LR, BV, and CCS—these are all part of our daily operations. This is precisely the core value that makes OLIPORTS a true partner for custom marine swivel shackles.

Can Type A swivel shackles be used with all types of anchors?

Yes, the OLIPORTS Type A Swivel Shackle is compatible with all standard anchor types, including HHP (High Holding Power) anchors, SHHP (Super High Holding Power) anchors, rodless anchors, plow anchors, and Bruce anchors. The large jaw end is designed to accommodate the standard shank sizes of these anchor types. For non-standard anchor designs, we can provide custom engineering solutions to ensure a perfect fit.

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OLIPORTS offer: Technical Datasheet PDF、Material Certificates、DWG or STEP files for design integration、On-request layout support. Our lashing experts typically reply within 24 hours. 💡 Based on your port design, berthing energy, and vessel data, we’ll provide:
⚙️ Recommended drawings & specifications
💬 A tailored quotation with best lead time
📎 Support for class approval documents

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