Blocks

63 companies | 1623 products
Double block / plain bearing / with swivel / with shackle

Lewmar synchro block are engineered for speed, efficiency and...

Triple block / plain bearing / with swivel / with shackle

Lewmar synchro block are engineered for speed, efficiency and...

Single block / plain bearing / with shackle / with becket

Lewmar synchro block are engineered for speed, efficiency and...

Double block / plain bearing / with becket / with swivel

Lewmar synchro block are engineered for speed, efficiency and...

Single block / with friction / lashing / max. rope ø 10 mm

When used in conjunction with heavy loads (mastfoot block, spinnaker tack point),...

Single block / with friction / lashing / max. rope ø 14 mm

When used in conjunction with heavy loads (mastfoot block, spinnaker tack point),...

Single block / roller bearing / with swivel / for sailboats

Commentary Complete range of blocks...

Single block / roller bearing / with becket / with swivel

Commentary Complete range of blocks Excellent...

Single block / high-resistance / for sailboats

They may look similar to some of our competitors...

Single block / ball bearing / lashing / max. rope ø 6 mm

20mm Dynamic Block Ezi-Tii They may look...

Single block / ball bearing / with fixed head / max. rope ø 6 mm

They may look similar to some of our competitors...

Single block / ball bearing / max. rope ø 6 mm / for sailboats

They may look similar to some of our competitors...

Plain bearing / for classic sailboats

Classic Blocks Combining the traditional cabinet-making skills of the Jura...

Double block / plain bearing / for classic sailboats

Classic Blocks Combining the traditional cabinet-making skills of the Jura...

Triple block / plain bearing / with fixed head / for classic sailboats

Combining the traditional cabinet-making skills of the Jura Mountain region...

Single block / vertical / max. rope ø 14 mm / for sailboats

FEATURES Class leading performance...

Single block / plain bearing / with swivel / for sailboats

New by Antal the One Piece Frame block,...

Single block / ball bearing / with swivel / for sailboats

New by Antal the One Piece Frame block,...

Single block / plain bearing / with swivel / for sailboats

New by Antal the One Piece Frame block,...

Single block / plain bearing / with swivel / for sailboats

New by Antal the One Piece Frame block,...

Cheek block / cam cleat / max. rope ø 10 mm / for sailboats

This jammer block is for situations...

Single block / cheek / cam cleat / max. rope ø 12 mm

This jammer block is for situations...

How to choose this product

block

A block comprises a sheave, or wheel held between two cheeks and a fitting to attach the unit to a fixed point. Its use multiplies mechanical advantage and reduces wear on the lines that run through it.

Applications

Blocks are used to make up block and tackle to increase purchase, as well as for halyard, sheet and other leads. Thus, they are typically found on sailboats, but may be used on any type of boat or ship, even if only for hoisting a flag or for davit operation.

Technologies

Block sheaves can be single, double, triple or even more. Most are of aluminum, stainless steel or titanium, though wood is often used on traditional sailboats. Cable blocks usually have a metal sheave. In friction blocks, the sheave is in direct contact with the axle, while other types have ball bearings or rollers.

Ratchet blocks have internal springs and a toothed mechanism to keep tension on the line between two pulls. They are most common in dinghy sailing. Block anchoring is via a shackle, a swivel or snap shackle, a fork or another system, which will depend on the rotational or torsional freedom of movement required.

How to choose

Roller models are probably the most efficient, combining the friction reduction of ball bearings and the superior sturdiness of the roller. Each block's rated operational and breaking load must be respected, as well as the maximum line diameter it can handle.

Subscribe to our newsletter
Thank you for subscribing
There was a problem with your request
Invalid email address

Receive updates on this section every two weeks.

With NauticExpo you can: Find a nearby distributor | Contact the manufacturer to get an estimate or a price Examine product characteristics and technical specifications | View PDF catalogs and other online documentation