GB/T 178-96 Spiral Type Chain Stopper | Swivel Anchor Chain Lock for Marine Vessels
Ensure operational safety and protect your vessel’s anchor windlass with our professional-grade GB/T 178-96 Spiral Type Chain Stopper. Also known as a swivel or screw-type chain stopper, this critical deck fitting is installed between the anchor windlass and hawsepipe to securely lock the anchor chain during mooring and sea voyages. Engineered to handle extreme forces, it effectively transfers the pull from the anchor and chain directly to the vessel’s hull, significantly reducing the workload on the windlass and enhancing overall system longevity.
Product Features & Operational Benefits
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Robust Force Management: Designed to withstand 80% of the chain cable’s breaking load, this device absorbs the anchor’s weight and inertial forces while sailing and manages mooring tensions, serving as a vital safety device for anchor windlass systems.
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Versatile Compatibility & Certification: We supply chain stoppers suitable for chain diameters from 17mm to 132mm, compatible with grade 2 anchor chains. Our products come with major marine certifications including CCS, ABS, DNV, and NR, ensuring certified marine deck machinery components for global operations.
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Durable Construction & Finishes: Manufactured from high-strength cast steel materials ZG200-400 and ZG230-450, using processes like casting and forging. The standard finish is Grey Epoxy Primer, with intermediate and top coats customizable to your specification, providing superior corrosion protection for marine hardware.
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Adaptable to International Standards: In addition to the GB/T 178-96 standard, we can manufacture chain stoppers according to JIS F2033, JIS F2002, and other JIS specifications, offering customizable anchor chain stoppers for shipbuilders.
GB/T 178-96 Spiral Chain Stopper – Technical Specifications
(Suitable for chain diameter 22-102mm, A-type for grade 2 anchor chain)
| Chain Diameter (mm) | B | B1 | B2 | B3 | B4 | B5 | b1 | b2 | c | d | d1 | d2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 22-26 | 280 | 104 | 40 | 94 | 76 | 84 | 20 | 35 | 190 | T26*8/2 | 250 | 25 |
| 28-32 | 310 | 118 | 45 | 114 | 92 | 90 | 25 | 40 | 210 | T28*8/2 | 320 | 26 |
| 34-38 | 360 | 134 | 50 | 136 | 110 | 105 | 30 | 45 | 250 | T30*10/2 | 320 | 30 |
| 40-44 | 420 | 152 | 55 | 160 | 128 | 120 | 35 | 50 | 290 | T32*10/2 | 400 | 34 |
| 46-48 | 480 | 172 | 65 | 186 | 145 | 130 | 40 | 60 | 330 | T36*10/2 | 400 | 36 |
| 52-58 | 550 | 192 | 75 | 214 | 166 | 150 | 45 | 75 | 380 | T40*10/2 | 400 | 40 |
| 60-66 | 640 | 212 | 85 | 250 | 190 | 170 | 50 | 90 | 440 | T44*12/2 | 500 | 40 |
The description/sizes may be different with goods, please check with us when order.
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