Sailboat Blocks

Boat Blocks Chosen by Sailors Who Actually Race

When your mainsheet system takes a beating upwind, the last thing you want is a sail block that flexes, squeals, or seizes. The Allen 16mm Double Thru Deck Plain Bearing is a strong example of what practical rigging hardware for sailboats looks like. Allen builds their blocks around plain bearing sheaves that resist grit and salt without needing constant maintenance. The thru-deck design keeps your rope run clean and your deck uncluttered. Sailors fitting out dinghies and sportboats will find Allen deck blocks sailing-ready straight out of the pack. No bedding compounds, no faffing. At Sailboats.co.uk, we stock Allen rope end hardware too, including the 13mm Dia Rope End Stoppers for up to 3mm rope, so you can complete your rigging run from block to cleat in a single order.

Mainsheet Blocks Matched to Your Class Rope Spec

Choosing mainsheet blocks without accounting for rope diameter is a common and expensive mistake. A 6mm rope run through a block sized for 10mm loses efficiency immediately. That is why our mainsheet blocks sit alongside class-specific rope options. The 6mm Prolite Anti-Kink Mainsheet for ILCA/Laser and the 7mm Prolite Anti-Kink Mainsheet for ILCA/Laser are both designed to feed cleanly through correctly matched marine blocks without twisting or binding under load. Prolite braid construction keeps the sheet light and responsive, which matters when you are trimming fast in variable pressure. Buying your mainsheet block and your rope together from one source means the system is specced to work as a unit. Sailors.co.uk has stocked class-legal ILCA equipment since the class was the Laser, so you get advice grounded in decades of actual race preparation.

Dinghy Blocks for Every Point in Your Rig

A single point of friction anywhere in your sail blocks and tackles system costs you speed and control. Snatch blocks for boats give you fast rope loading without threading the line through. Double blocks sailing applications, such as a fiddle block on a kicker or a cascade on a cunningham, multiply your mechanical advantage without adding bulk. High load sailing blocks handle peak loads at the mast base and boom end without deforming under pressure. Nautical blocks and pulleys for the deck cover turning points, fairleads, and clew attachments. Each application calls for a specific sheave diameter, bearing type, and attachment style. At Sailboats.co.uk, the range covers all of these positions. The Allen 15mm Aluminium Thimble is one small but important component that pairs with rope terminals and soft-shackle setups to protect your line at high-friction anchor points.

Shop similar collections: Sailing dinghy blocks | Vang Top Boat Blocks | Downhaul Boat Blocks | Boat Cleats | Deck Boat Blocks 

FAQ

What are sailboat blocks?

Sailboat blocks are pulley devices that redirect and multiply the force applied to control lines, sheets, and halyards throughout the rig. They sit at key points across the boat, from the mast base to the traveller car, and form the core of any block and tackle sailing system.

What is a sailor block?

A sailor block is a nautical pulley, and sailboat blocks use a rotating sheave inside a housing to redirect rope with minimal friction. The configuration, whether a single block, double block, or snatch block, depends on where it sits in the rigging and how much mechanical advantage the system requires.

What are the parts of a sail called?

The main parts of a sail include the head (top), tack (forward lower corner), clew (aft lower corner), luff (leading edge), leech (trailing edge), and foot (bottom edge). Sailboat blocks and associated rigging hardware attach at or near these points to control sail shape and trim.