Antal Mainsheet Block with Cam Cleat for E7/60

The Antal Mainsheet Block with Cam Cleat for E7/60 is the lower block used in Antal’s 7:1 mainsheet system for yachts up to approximately 36 feet. Designed for sailors seeking increased mechanical advantage and finer control, this unit forms the heart of a smooth and compact 7:1 tackle configuration.

It features a 60 mm primary sheave at the base and is topped with a triple 50 mm block that handles the intermediate reeving. An integrated cam cleat allows for fast, secure locking of the mainsheet, making it an ideal solution for short-handed or performance-oriented setups.

This block is available individually for use in custom systems or retrofit upgrades, particularly when reusing boom-end components.

Key Features

• Purpose-Built for 7:1 Purchase
  Provides the lower half of a high-efficiency 7:1 mainsheet system, delivering excellent trimming power while maintaining a streamlined configuration.
• Sheave Configuration
  • 1 × 60 mm sheave (load-bearing base)
  • 3 × 50 mm sheaves (mounted above in a compact triple arrangement)
• Integrated Cam Cleat
  Positioned for convenient cleating and quick release under load, ideal for cockpit-based trimming.
• Smooth Operation
  Dual ball bearings in all sheaves ensure efficient movement and reduced effort during sail adjustment.
• Durable Materials
  Constructed from anodised aluminium and stainless steel to ensure resistance to corrosion and long-term reliability in marine environments.

Specifications

• Sheave Sizes: 1 × 60 mm (lower), 3 × 50 mm (upper)
• Cam Cleat: Integrated
• Becket: Not required on this block (system starts at boom)
• Rope Compatibility: Up to Ø10 mm
• Safe Working Load (SWL): 800 kg
• Recommended Boat Size: Up to 36 ft (11 m)

Boom-End Block Requirement

To complete the 7:1 configuration using this block, you will need the following blocks at the boom end:

• 1 × Double block with becket (50 mm sheaves)
• 1 × Single block (50 mm sheave)

The boom-mounted double block with becket serves as the starting point for the mainsheet, while the single block completes the upper reeving.

This mainsheet block is ideal for sailors upgrading to a more powerful 7:1 system or replacing worn components, offering precise handling and reliable performance in a clean, efficient design.