HARKEN 3221 Footblocks Lockoff

( Brand: Harken ), ( Manufacturer Part Number: 3221 ), ( Part Type: Aluminum )

Review HARKEN 57mm Aluminum Footblocks Lockoff fits 57

The Harken 3221 57-foot Block and Tackle system is a premium marine grade locking pulley solution designed for heavy-duty applications. This system features a 5:1 mechanical advantage, meaning that for every foot of input rope pulled, the output rope will travel five feet. This makes it an excellent choice for handling large loads or for applications where a significant amount of force needs to be applied.

The 3221 Block and Tackle system consists of a set of five blocks, each with a locking mechanism, and a length of high-performance Dyneema rope. The blocks are made from robust and durable fiberglass reinforced nylon, ensuring that they can withstand the rigors of the marine environment. The blocks are also designed with a self-tailing feature, which makes it easier to control the rope and keep it under tension.

The locking mechanism on each block is a key feature of this system. It utilizes a simple yet effective cam lock system that securely holds the rope in place once tension is applied. This ensures that the load is safely secured and that there is no chance of the rope slipping or coming loose. The cam locks are easy to operate, even when wearing gloves, and can be engaged and disengaged with a simple flick of the wrist.

The system also includes a 7/16" (11mm) diameter Dyneema rope, which is renowned for its strength and durability. It has a breaking strength of over 10,000 lbs (45,360 kg), making it more than capable of handling the loads that this block and tackle system is designed for. The rope is also low-friction, which makes it ideal for use with blocks and pulleys, as it reduces the amount of effort required to move the load.

In summary, the Harken 3221 57-foot Block and Tackle system is a high-performance, marine-grade locking pulley solution that is perfect for heavy-duty applications. Its robust construction, self-tailing blocks, and secure locking mechanism make it a reliable and effective tool for handling large loads, while its use of high-performance Dyneema rope ensures that it can do so with ease and efficiency.

Harken 3221 57-foot blocks with lockoff system are popular among sailors due to their robust design, smooth operation, and versatility. However, like any other sailing equipment, they come with their advantages and disadvantages.

1. Durability: Harken blocks are known for their high-quality materials and precise manufacturing, ensuring long-lasting performance even in harsh marine conditions. The 3221 model is no exception, with its heavy-duty construction that can withstand the loads and stresses of sailing.

2. Smooth operation: The self-aligning bearings and low-friction sheaves of the Harken 3221 blocks ensure that the lines glide through them smoothly, reducing the effort required to handle sails and making sailing more enjoyable.

3. Versatility: The Harken 3221 blocks come in various sizes, making them suitable for different sailing applications. The lockoff feature is particularly useful for controlling the line tension and securing the sails in place, which is essential for efficient sail trimming and optimal sail performance.

4. Safety: The lockoff system of the Harken 3221 blocks provides an additional safety feature by preventing the line from slipping through the block when under load. This is particularly important in heavy weather conditions or when sailing alone.

1. Cost: Harken blocks are known for their premium price tag, and the 3221 model with lockoff is no exception. The cost may be a significant consideration for some sailors, especially those on a budget.

2. Weight: The heavy-duty construction of the Harken 3221 blocks adds to their weight, which may be an issue for lighter or smaller boats that require a lighter rig.

3. Complexity: The lockoff system of the Harken 3221 blocks adds an extra layer of complexity to the blocks, which may require additional maintenance and adjustment to ensure proper operation.

In conclusion, the Harken 3221 57-foot blocks with lockoff offer numerous advantages, such as durability, smooth operation, versatility, and safety. However, they also come with some disadvantages, including cost, weight, and complexity. Ultimately, the decision to purchase these blocks depends on the sailor's specific needs, budget, and sailing conditions. If the advantages outweigh the disadvantages and the sailor values the premium performance and safety features, then the Harken 3221 blocks with lockoff are an excellent investment for their sailing equipment.

Details:

Set of 2 footblocks with lockoff. Maximum line mm 12mm. Sheave mm 57mm. See pictures.

Sheave in 2 1/4 in. Great condition, smooth function.

specifications sailgrinch:

• for models: 57
• brand: Harken
• mpn: 3221
• part type: Aluminum

offer sailgrinch:

• sold: 0
• options: Ship-to-home
• started: November 6, 2025
• availability: In Stock
• quantity: 1

shipping sailgrinch:

• cost: $0.00
• type: Calculated
• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• transit: 6-13 Days

payments sailgrinch:

• credit card: Diners-club
• other
• wallet: Apple-pay

seller sailgrinch:

• city: Lexington, South Carolina
• rating: 100.0%
• # reviews: 156

returns sailgrinch:

• policy: No Returns

general sailgrinch:

• Boat Parts > Sailing Hardware Gear > Other Sailing Hardware Gear
• condition: Used

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