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.

Specification

Sheave Ø (mm)	60
SWL (kg)	800
Power ratio 1 (X : 1)	7

Antal Mainsheet Block with Cam Cleat for E7/60