Product Description:

Material Advantages:

Stable pulling force: On regular seabeds (sand, mud), the pulling force performance is reliable, meeting the daily anchoring needs of merchant ships, with high cost-effectiveness.
Easy operation: The absence of cross-bar design simplifies the retraction, storage and reassembly process, reducing the operational intensity of crew members and improving work efficiency.
Low maintenance cost: The cast steel structure is sturdy and durable, with adequate surface protection treatment. Daily maintenance only requires regular inspection of accessories and surface coatings, making the maintenance simple.

Manufacturing Process:

The production process of Admiralty Anchors strictly adheres to marine anchor casting standards and offshore mooring equipment strength requirements, centered on “structural precision, material strength and toughness, and corrosion resistance compliance.” Specific steps are as follows:

### 1. Raw Material Preparation and Mold Design
- Select high-strength cast steel (ZG230-450) or premium marine carbon steel. Ingredients are blended according to chemical composition requirements to ensure compliance with carbon, manganese, and other elemental content standards, enhancing tensile strength and toughness.
- Design sand molds based on anchor specifications (weights ranging from 500kg to 50t). The mold cavity precisely replicates the naval anchor's “four-fluke crown + crossbar” structure. Thickened sections are incorporated at the anchor fluke-to-shank junctions. Mold inner walls undergo polishing to prevent surface defects in castings.

### 2. Monolithic Casting
- Molten cast steel (1500-1600°C) is injected into the mold via a pouring system using gravity casting. This ensures uniform filling without dead zones or porosity.
- After natural cooling to room temperature, the mold is opened to remove the anchor blank. Gates, risers, flash, and other excess material are trimmed to prevent residual stress-induced cracking.

### 3. Structural Reinforcement and Precision Machining
- Critical load-bearing areas like anchor claws and crown undergo forging reinforcement to enhance localized hardness and impact resistance. Claw edges are ground to ensure sharpness and improve seabed gripping efficiency.
- Machine the connection hole at the top of the anchor body (to match anchor chain specifications). Bore the hole walls smooth to ensure secure chain attachment. Secure the crossbar via welding or integral casting. Apply full-penetration welding at joints and perform non-destructive testing.

### 4. Surface Anti-Corrosion Treatment
- Perform sandblasting rust removal first to thoroughly eliminate surface scale, rust, and oil contamination, achieving Sa2.5 standard to enhance coating adhesion.
- Apply a dual-layer coating of “epoxy zinc-rich primer + marine-grade topcoat” (total thickness ≥150μm) or utilize hot-dip galvanizing (zinc coating thickness ≥85μm). Both methods effectively resist offshore seawater corrosion and salt spray erosion.

### 5. Finished Product Inspection and Quality Control
- Visual Inspection: Verify anchor body is free of cracks, pores, pinholes, or other defects. Structural dimensional deviation ≤ ±3%. Anchor fluke symmetry and crossbar verticality meet design requirements.
- Performance Testing: Conduct tensile strength testing (≥400MPa) and impact toughness testing. Perform simulated holding force tests on samples to verify holding force meets standards (≥8 times its own weight).
- Corrosion Resistance Testing: Pass salt spray testing (1000 hours continuous) to evaluate coating or galvanized layer durability, meeting offshore long-term service requirements.
- Compliance Certification: Products must obtain certification from classification societies such as CCS and ABS, ensuring compliance with GB/T 5468-2019 “General Technical Conditions for Marine Anchors” and offshore mooring equipment standards.

### 6. Packaging and Shipping
- Packaged securely on wooden pallets or steel frames to prevent deformation during transit. Anchor bodies are wrapped in moisture-proof film to protect anti-corrosion coatings.
- Includes product inspection reports, certification documents, and installation manuals for seamless offshore project integration or on-site deployment.

Features:

Rackless compact design: Eliminates the traditional crossbar (Stock), facilitating storage in the anchor hole, making operation and retraction more efficient. Especially suitable for modern ship anchor chain pipes and anchor hole layouts, reducing deck occupation and operational risks.
Structural strength and material: Cast in one piece using ZG200-400 and other marine cast steel, with anchor crown having a top plate and reinforcing ribs, enhancing bottom gripping stability and penetration ability; anchor claws and anchor shaft can rotate approximately 45° around the pin shaft, with both claws entering the soil simultaneously, with a grip weight ratio of 2.5–4, meeting mainstream classification societies' CCS, ABS, LR, DNV, etc. certifications.
Damage prevention and balance optimization: When retrieved, the anchor claws naturally point upwards and flip over upon contact with the hull, avoiding damage to the outer plates; the low center of gravity design (such as Type SR) further improves bottom gripping efficiency and stability, suitable for harsh sea conditions.
Specifications and compatibility: Weight range from 40kg to 26,000kg, compatible with anchor chain diameters of 12.5mm to 162mm; surface can be treated with asphalt paint, anti-rust paint, etc. for corrosion protection, suitable for different navigation environments.

Technical Parameters:

Applications:

Commercial shipping: The bow anchors or backup anchors of mainstream commercial ships such as bulk carriers, container ships, and oil tankers, suitable for both ocean and coastal routes, taking into account both pulling power and operational efficiency.
Cruise ships and luxury yachts: Models like Type SR feature a low center of gravity and damage prevention design, suitable for the anchoring needs of large cruise ships and yachts, ensuring the safety of passengers and the integrity of the ship.
Engineering vessels: Positioning anchors for dredgers, cranes, platform supply ships, etc., for operations, capable of withstanding frequent anchoring and complex seabeds, providing stable positioning capabilities.
Fishing and small vessels: Main anchors for small fishing boats and work boats, with a compact design for easy storage, suitable for nearshore and coastal operations.
Marine facilities: Permanent mooring anchors for buoys, lighthouse ships, offshore wind power platforms, etc., resistant to long-term seawater corrosion, ensuring the stability of facilities.

Selection Suggestions
Match the anchor weight with the ship's deadweight tonnage and the anchor chain specification, following the classification society's norms.
For sandy/mud-bottomed sea beds, Type 95 is preferred; for complex sea conditions or large ships, Type SR is recommended.
The anchor chain for the matching system must undergo tension testing to ensure it matches the strength of the anchor claws, thereby enhancing the reliability of the overall anchoring system.

Support and Services:

After-sales consultation: We provide 24/7 customer service to answer customer questions , such as specification selection, usage methods, and maintenance points.

Backed by decades of marine hardware manufacturing expertise, our anchors comply with international marine standards and undergo rigorous quality testing—including load-bearing tests, corrosion resistance tests, and seabed simulation trials—to ensure reliability. We offer customization services for size, material, and surface treatment to meet the unique requirements of different vessels and marine projects.
Trust our  Marine Anchor to secure your vessel with uncompromising strength and stability, even in the most challenging marine conditions.

With class-certified quality, robust construction, and reliable performance, our Spek anchor is a trusted choice for shipowners and operators worldwide. It not only meets the strictest safety standards but also delivers cost-effective, long-term mooring solutions for diverse marine applications.
We can customize anchor specifications according to your vessel’s unique requirements. Contact us today for detailed technical drawings and quotation!
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