Lewmar 66840079 Chain Stopper For 10MM - 3/8 Chain
Lewmar 66840079 Chain Stopper For 10MM - 3/8 Chain — Product description
Secure your anchoring setup with confidence using this robust chain stopper designed specifically for 10mm or 3/8-inch chains. Built to handle the rigors of marine environments, it locks the chain firmly in place once your anchor is set, preventing unwanted slippage during rough seas or sudden wind shifts. Boaters who prioritize reliability swear by its straightforward design that integrates seamlessly with most windlass systems.
Imagine dropping anchor after a long day on the water, knowing your chain won't creep forward—no more midnight checks or frayed nerves. This stopper takes the guesswork out of chain management, letting you focus on the horizon.
Standout Features for Everyday Boating
- Precision Fit: Tailored for 10mm (metric) or 3/8-inch (imperial) chains, ensuring a snug hold without damaging galvanization.
- Durable Construction: Crafted from high-grade materials resistant to saltwater corrosion, UV exposure, and heavy loads—tested in real-world conditions from coastal cruising to offshore passages.
- Easy Release Mechanism: Quick-action toggle allows smooth chain payout when retrieving anchor, minimizing deck clutter and hassle.
- Compact Profile: Low-profile design mounts flush to your deck, preserving that sleek yacht aesthetic while maximizing space.
- Universal Compatibility: Works hand-in-hand with popular windlasses, ideal for bow roller setups on sailboats, powerboats, or catamarans.
Why This Chain Stopper Elevates Your Anchoring Game
Unlike basic alternatives that loosen under tension, this stopper provides bombproof security. It distributes load evenly across the chain link, reducing wear on your windlass gypsy and extending the life of your entire ground tackle system. Skippers report fewer chain jams and more peaceful nights at anchor—essential for family outings or solo adventures.
In choppy conditions, where chain catenary can fail, this device shines by maintaining position without relying solely on your windlass brake. It's a small addition with outsized impact, often overlooked until you're swinging in a blow.
Simple Installation and Pro Tips
Mounting is a breeze—drill four holes, secure with bolts, and align with your chain path. No special tools required, and it bolts directly to fiberglass, aluminum, or teak decks. For best results:
- Position it 12-18 inches aft of your windlass for optimal chain flow.
- Use marine-grade sealant on fasteners to thwart leaks.
- Test under moderate load before your next voyage.
Pro tip: Pair it with a snubber for dynamic loads in high winds—your chain and nerves will thank you.
Keep It Performing Like New
Routine care is minimal: Rinse with fresh water after each saltwater dunk, inspect the pawl for debris, and lubricate pivot points annually with a marine grease. Avoid harsh chemicals that could compromise the finish. With proper upkeep, it'll outlast multiple seasons of hard use.
Frequently Asked Questions
What chain sizes is this stopper compatible with?
It's engineered for 10mm (short link or calibrated) or 3/8-inch BBB/proof coil chains, providing a secure fit without slippage.
How does a chain stopper differ from a windlass brake?
A windlass brake holds temporarily during operation, but a chain stopper is your permanent anchor—offloading strain from the motor and gypsy for longer gear life.
Is it suitable for both power and sailboats?
Absolutely—its versatile design fits bow-mounted systems on monohulls, multihulls, and motor yachts alike.
Can it handle heavy weather anchoring?
Yes, it's load-rated for typical recreational anchoring forces, excelling in winds up to gale conditions when properly installed.
What maintenance does it need?
Freshwater rinse after use, annual lubrication, and visual checks—keeps it reliable season after season.
Does it work with electric windlasses?
Perfectly—many users pair it with electric models to relieve motor strain during extended holds.
"Windlasses are not designed to hold high loads while a boat is at anchor. When the windlass is not in use and the boat is at anchor, the chain should be secured using a chain stopper or the rope rode should be attached to a load-bearing point such as a cleat. Lewmar has created a beautiful new range of cast stainless chain stoppers made from 316 stainless steel, perfect for sleep-filled nights and lazy lunches.The 8, 10, 12, 14 and 16mm chain stoppers have a Safe Working Load (SWL) that is greater than the SWL of the chain."
SKU: NVN-1002090
MPN: 66840079
UPC: 743683328404
Technical specifications
| Brand | Lewmar |
| Model | Lewmar 66840079 Chain Stopper For 10MM - 3/8 Chain |
| SKU / MFR# | 1002090 |
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Frequently asked questions
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