Antal Mainsheet Block with Cam Cleat for E6/75

The Antal Mainsheet Block with Cam Cleat for E6/75 is the primary lower block from Antal’s 6:1 tackle system, designed for yachts up to approximately 40 feet. Built to handle heavier loads, this robust unit combines a large 75 mm primary sheave with two stacked 60 mm sheaves and an integrated becket, forming the core of a smooth and efficient high-load mainsheet system. A cheek-mounted cam cleat provides reliable, one-handed control during trimming.

This block is ideal for sailors upgrading or replacing components, particularly those reusing existing boom blocks.

Key Features

• Optimised for 6:1 Systems
  Designed to deliver full 6:1 mechanical advantage when paired with the correct upper blocks. The integrated becket at the base allows the mainsheet to start cleanly within the tackle.
• Sheave Layout
  • 1 × 75 mm primary sheave (main load path)
  • 2 × 60 mm sheaves (reeving)
  • Integrated becket for sheet termination
• Integrated Cam Cleat
  Positioned for easy access and reliable grip during manoeuvres.
• Smooth, Low-Friction Operation
  All sheaves run on dual ball bearings, ensuring consistent performance and easy adjustment under load.
• High-Strength Construction
  Built with anodised aluminium and stainless steel for excellent corrosion resistance and long-term durability.

Specifications

• Sheave Sizes: 1 × 75 mm (lower), 2 × 60 mm (upper)
• Becket: Integrated
• Cam Cleat: Integrated
• Rope Compatibility: Up to Ø12 mm
• Safe Working Load (SWL): 1000 kg
• Recommended Boat Size: Up to 40 ft (12 m)

Boom-End Block Requirement

To complete a 6:1 tackle system using this block, pair it with:

• 1 × Double block (60 mm sheaves)
• 1 × Single block (60 mm sheave)

The integrated becket allows for a clean starting point, meaning simple boom blocks are sufficient—no becket needed at the top.

This standalone mainsheet block is a durable, high-capacity solution for sailors seeking precision, strength, and simplicity when upgrading or customising their sail handling systems.