Anchor chain stopper

Types of anchor chain stopper

The anchor chain stopper is a vital component of a vessel's anchoring system. It is used to secure the anchor chain when the anchor is on-deck. It relieves the windlass of the chain's weight and permits easy handling of the anchor, improving safety. There are several types of anchor chain stoppers, including the following.

• Shackles

  Shackles are U-shaped; they have a bent pin or removable link at one end, which can be opened to attach to the anchor chain. Then, it is closed and screwed down on the other end, providing a secure yet movable connection. The anchor shackle connects the vessel's anchor to its chain. It is vital to ensure that the shackle is the right size for the chain it connects to avoid failure or accidents.

• Chain stoppers

  Chain stoppers are devices used to hold the anchor chain when the vessel is anchored. By doing so, they stop the chain from running in and out of the hawsepipe. This action relieves the windlass of the chain's weight, allowing easy handling of the anchor. As a result, the chain stopper plays a crucial role in the anchoring system. There are different types of chain stoppers, including:

  Manual chain stoppers: These are chain stoppers that are operated and secured manually. They are further divided into chain clamp stoppers and chain hook stoppers. The clamp stopper is a hoop or frame through which the anchor chain passes. It has bolts on either side that allow it to be closed around the chain. A chain hook stopper consists of a hook that the anchor chain hangs onto. The other end of the hook has a loop that a pin passes through, securing it to the ship.

  Automatic chain stoppers: These chain stoppers are self-tightening. They are further divided into chain lock stoppers and chain latch stoppers. The chain lock stopper has a lock that slides along the frame as the chain runs. The lock moves to the other end of the frame when the chain pulls. This mechanism prevents the lock from moving in the opposite direction without the operator's consent. On the other hand, the chain latch stopper has a spring-loaded latch that closes on the anchor chain. The latch can be opened manually to release the chain when necessary.

• Chain wildcats

  Chain wildcats are a part of the anchor windlass. They are large wheels with deep grooves that fit the anchor chain links. When the vessel is anchored, the wildcat locks the chain, stopping it from moving. This action relieves the windlass and prevents accidents. Chain wildcats come in different types, including the following:

  Plain wildcats: They are wildcats with a smooth groove. They are used for handling stud link chains, which are chains with links that resemble a flattened oval. Each link is a little wider than the groove on the wildcat.

  Conversion wildcats: These are wildcats that have been modified to accommodate different chain sizes. They have adjustable grooves or additional pieces that can be removed to change the wildcat's size.

Specifications and maintenance of the anchor chain stopper

Specifications of anchor chain stoppers vary depending on the type and design. Here are some general specifications:

• Material:

  The chain stopper is usually made from different materials. It may be made of cast iron or steel. These materials provide high strength and durability.

• Working Load Limit (WLL):

  The WLL is the maximum load the chain stopper can hold during normal operations. It is important to ensure that the chain stopper is selected for a specific application.

• Size and Dimensions:

  An anchor chain stopper comes in different sizes. It is designed to fit specific anchor chain sizes. The length and width of the chain stopper should be appropriate for the chain design.

• Safety Factor:

  Anchor chain stoppers have a safety factor that allows for unexpected loads. The safety factor is usually between 4 and 6.

• Corrosion Resistance:

  Some anchor chain stoppers are designed for marine environments. Therefore, it is important to consider the corrosion resistance property. The chain stopper can be coated with different materials to enhance corrosion resistance.

Maintenance of anchor chain stoppers is very important for optimal performance and durability. Here are some of the maintenance practices:

• Regular Inspection:

  There should be regular inspections of the anchor chain stoppers for wear, corrosion, and damage. The visually damaged parts should be repaired or replaced immediately.

• Cleaning:

  There should be regular cleaning of the anchor chain stoppers. Cleaning helps in the removal of dirt, salt, and debris. The cleaning can be done using fresh water and mild detergent.

• Lubrication:

  There should be regular lubrication of the moving parts of the anchor chain stoppers. Lubrication enhances the smooth operation of the chain stopper. It also reduces wear and friction.

• Paint Protection:

  There should be regular inspection of the paint on the anchor chain stoppers. Damaged paint should be repaired. This prevents corrosion and enhances the anchor chain stoppers' appearance.

• Proper Storage:

  When not in use, anchor chain stoppers should be properly stored in a dry and clean place. This protects the chain stoppers from damage and minimizes wear.

• Load Testing:

  The anchor chain stoppers should be periodically load-tested. This is to ensure that the chain stoppers are functioning properly. Load testing should only be done by trained personnel.

How to Choose Anchor Chain Stopper

When selecting an anchor chain stopper for resale, consider these factors:

• Size and capacity

  Selecting a chain stopper that is the right size and has the capacity to handle the anchor chain's thickness is very important. The chain stopper should be able to withstand the maximum expected load without failing or causing damage.

• Material

  Chain stoppers are usually made of steel or cast iron. It's best to select a steel chain stopper because steel is very durable and can handle heavy loads without breaking or wearing out quickly.

• Design

  There are different designs of anchor chain stoppers, but it is best to choose the L-type and Ls-type stoppers because they are more widely used and suitable for various ships. The L-type and LS-type stoppers offer reliable performance and are less likely to fail.

• Ease of installation and operation

  Selecting a chain stopper that is easy to install and operate is very important. This helps to ensure that it functions properly without any problems. It is advisable to choose a chain stopper with a simple design and clear instructions for installation and use.

• Corrosion resistance

  Selecting an anchor chain stopper with good resistance to rust and corrosion is very important. This is because, over time, these can damage the chain stopper and make it unusable. To stop this, regularly cleaning and maintaining the chain stopper can help it last longer.

• Price

  When selecting an anchor chain stopper for resale, consider the price. It is advisable to choose a chain stopper that is affordable and offers good value for money. There are many different options available, so finding one that fits the budget should be easy.

How to DIY and Replace Anchor Chain Stopper

Replacing an anchor chain stopper can be a complicated process. It often requires the help of a qualified marine engineer or professional. That said, here are some steps to give you an idea of what the replacement process looks like:

• Preparation:

  Prepare the vessel by ensuring it is stable and secure. Read through the manufacturer's instructions to understand the process. Select the right chain stopper for the vessel.

• Access:

  Gain access to the anchor chain locker where the chain stopper is located. This may involve opening hatches or access ports.

• Disconnection:

  Disconnect any fittings or connections linking the chain stopper to the anchor handling system. This may include removing bolts, nuts, or pins.

• Removal:

  Carefully remove the old chain stopper. Depending on its size and weight, this may require lifting or hoisting equipment.

• Inspection:

  Inspect the surrounding components, such as the anchor chains, for wear or damage. Address any issues before installing the new chain stopper.

• Installation:

  Position the new anchor chain stopper in place. Follow the manufacturer's instructions for installation. Reconnect any fittings or connections that were disconnected during removal.

• Testing:

  Perform a functional test to ensure the chain stopper works correctly. Check for any leaks, noise, or abnormal operation during testing.

• Access Closure:

  Once satisfied with the installation and functionality, close any access hatches or ports that were opened during the process.

• Documentation:

  Document the replacement process, including the date, details of the new chain stopper installed, and any other relevant information.

Q&A

Q1: What is the difference between a chain stopper and a chain tensioner?

A1: While a chain stopper is used to stop the chain at a certain point, a chain tensioner keeps the chain at the right tension to prevent slippage. The chain tensioner is usually mounted on the rail.

Q2: Do I need a chain stopper for my boat?

A2: A chain stopper is not a mandatory accessory for a boat. However, it makes life on the boat easier. It allows sailors to release the anchor chain without worrying about the chain slipping or the anchor coming up the wrong way.

Q3: What is the best material for a chain stopper?

A3: The best material for a chain stopper is high-grade steel. This is because steel is known for its durability and strength. A chain stopper made of steel can withstand the harsh marine environment and heavy anchor loads.