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block / plain bearing / single / with swivel / with shackle
block / plain bearing
Racing

Working load: 800 kg
Breaking load: 1600 kg

Lewmar's Racing Blocks represent the pinnacle of our standard block range. Manufactured from the best materials, they offer incredible strength to weight ratios. Features Lockable head pin ...

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Lewmar
ball bearing block / single / for racing sailboats / halyard
ball bearing block
Racing

Working load: 2500, 1400 kg

Features Impregnated composite bearings with dual Delrin side thrust races, ideal for high static loads. Low profile head fits into pad eye for lowest lead to the winch. Alloy sheave profile for H.M P.E. line such as ...

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Lewmar
ball bearing block / double / with shackle / max. rope ø 12 mm
ball bearing block
Racing

Working load: 1800 kg
Breaking load: 3600 kg

Lewmar's Racing Blocks represent the pinnacle of our standard block range. Manufactured from the best materials, they offer incredible strength to weight ratios. Features Lockable head pin ...

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Lewmar
cheek block / single / with swivel snap shackle / for racing sailboats
cheek block
Racing

Working load: 1135 kg
Breaking load: 2270 kg

Ideal for general spinnaker use, the Snatch Block features the Lewmar snap shackle and soft, synthetic rubber cheeks to handle rough treatment. Where a snatch block is attached in a situation which does ...

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Lewmar
mast foot block / ball bearing / single / for racing sailboats
mast foot block
Racing

Working load: 400 kg - 19000 kg

Lewmar's Racing Blocks represent the pinnacle of our standard block range. Manufactured from the best materials, they offer incredible strength to weight ratios. Features Lockable head pin ...

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Lewmar
block / plain bearing / single / with swivel / for sailboats
block / plain bearing
NEX 2.5 / 5.0

General description The halyard block is an optional accessory to be used with Profurl flying sails furlers. Integrated into the top swivel, it allows to optimize the luff length. The sheave box stands half of the load ...

roller bearing block / single / with swivel / for sailboats
roller bearing block
90105

Working load: 140 kg
Breaking load: 700 kg

Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment methods Protection of the sheave ...

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Wichard
roller bearing block / single / with swivel / with becket
roller bearing block
90106

Working load: 140 kg
Breaking load: 700 kg

Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment methods Protection of the sheave by the cheeks ...

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Wichard
roller bearing block / single / with swivel / max. rope ø 10 mm
roller bearing block
93105

Working load: 320 kg
Breaking load: 900 kg

Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment methods Protection of the sheave ...

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Wichard
roller bearing block / single / with swivel / with becket
roller bearing block
93106

Working load: 320 kg
Breaking load: 900 kg

Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment methods Protection of the sheave ...

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Wichard
cheek block / flat / single / with fork
cheek block
93120

Working load: 320 kg
Breaking load: 900 kg

Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment methods Protection of the sheave ...

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Wichard
block / plain bearing / single / lashing / max. rope ø 6 mm
block / plain bearing
KBO1

Working load: 150 kg
Breaking load: 300 kg

KBO lashing blocks have the best size to weight ratio on the market. KBO rope lashing makes fitting easier and quicker than standard shackle LIGHT WEIGHT The design and material optimization make the block ...

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Karver Systems
roller bearing block / double / lashing / max. rope ø 6 mm
roller bearing block
KBO1

Working load: 250 kg
Breaking load: 500 kg

The KBO range is available in double and triple blocks with rope shackle attachments up to the KBO8. The use of soft attachments avoids metallic connections between blocks and allows for impressive weight ...

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Karver Systems
roller bearing block / triple / lashing / max. rope ø 6 mm
roller bearing block
KBO1

Working load: 350 kg
Breaking load: 700 kg

The KBO range is available in double and triple blocks with rope shackle attachments up to the KBO8. The use of soft attachments avoids metallic connections between blocks and allows for impressive weight ...

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Karver Systems
block / plain bearing / single / lashing / max. rope ø 8 mm
block / plain bearing
KBO2

Working load: 220 kg
Breaking load: 440 kg

KBO lashing blocks have the best size to weight ratio on the market. KBO rope lashing makes fitting easier and quicker than standard shackle LIGHT WEIGHT The design and material optimization make the block ...

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Karver Systems
roller bearing block / double / lashing / max. rope ø 8 mm
roller bearing block
KBO2

Working load: 350 kg
Breaking load: 700 kg

The KBO range is available in double and triple blocks with rope shackle attachments up to the KBO8. The use of soft attachments avoids metallic connections between blocks and allows for impressive weight ...

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Karver Systems
block / plain bearing / single / with fixed head / max. rope ø 6 mm
block / plain bearing
PBB20

Working load: 70 kg
Breaking load: 140 kg

Specifications Weight: 6.00 g Safe working Load: 70 kg Breaking Load: 140 kg Max line size: 6 mm System: PBB20 Block type: single

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Seldén Mast AB
block / plain bearing / single / with fixed head / max. rope ø 6 mm
block / plain bearing
PPB 16

Working load: 70 kg
Breaking load: 140 kg

Specifications Weight: 6.00 g Safe working load: 70 kg Breaking load: 140 kg Max line size: 6 mm System: PBB16 Block type: single

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Seldén Mast AB
block / plain bearing / single / with fixed head / max. rope ø 6 mm
block / plain bearing
PPB 16

Working load: 100 kg
Breaking load: 200 kg

Specifications Weight: 10.00 g Safe working load: 100 kg Breaking load: 200 kg Max line size: 6 mm System: PBB16 Block type: single

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Seldén Mast AB
block / plain bearing / single / with swivel / max. rope ø 12 mm
block / plain bearing
PBB 50

Working load: 700 kg
Breaking load: 1400 kg

... Safe working load: 700 kg Breaking load: 1400 kg Max line size: 12 mm Pin diam: 5 mm Shackle diam: 5 mm System: PBB50 Block type: single

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Seldén Mast AB
block / plain bearing / single / with becket / with swivel
block / plain bearing
PBB 50

Working load: 700 kg
Breaking load: 1400 kg

... Safe working load: 700 kg Breaking load: 1400 kg Max line size: 12 mm Pin diam: 5 mm Shackle diam: 5 mm System: PBB50 Block type: singleBecket

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Seldén Mast AB
block / plain bearing / double / with swivel / max. rope ø 8 mm
block / plain bearing
B300371B

Working load: 450 kg
Breaking load: 850 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
block / plain bearing / double / with swivel / max. rope ø 12 mm
block / plain bearing
B300571B

Working load: 700 kg
Breaking load: 1250 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
block / plain bearing / double / with swivel / max. rope ø 14 mm
block / plain bearing
B300671B

Working load: 1150 kg
Breaking load: 2100 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
block / plain bearing / double / with swivel / with becket
block / plain bearing
B300372B

Working load: 450 kg
Breaking load: 850 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
block / plain bearing / double / with swivel / with becket
block / plain bearing
B300572B

Working load: 700 kg
Breaking load: 1250 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
block / plain bearing / single / with swivel / max. rope ø 10 mm
block / plain bearing
MR1001-0115

Working load: 35 kg - 450 kg

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Qingdao K-Wing Industry Co., Ltd
block / plain bearing / double / max. rope ø 10 mm / max. wire rope ø 10 mm
block / plain bearing
MR1001-0225

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Qingdao K-Wing Industry Co., Ltd
single block / with swivel / max. rope ø 10 mm / max. wire rope ø 10 mm
single block
MR1007-0125

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Qingdao K-Wing Industry Co., Ltd
block / plain bearing / double / with swivel / max. rope ø 10 mm
block / plain bearing
MR1007-0225

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Qingdao K-Wing Industry Co., Ltd
block / plain bearing / single / max. rope ø 8 mm / for sailboats
block / plain bearing
MR1008-0125

Breaking load: 350 kg

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Qingdao K-Wing Industry Co., Ltd
ball bearing block / single / with swivel / for sailboats
ball bearing block

ball bearing block / single / with swivel / with becket
ball bearing block
YC40S

Working load: 500 kg
Breaking load: 1000 kg

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UBI MAIOR ITALIA
ball bearing block / single / with swivel / with becket
ball bearing block
YC40SA

Working load: 500 kg
Breaking load: 1000 kg

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UBI MAIOR ITALIA
mast foot block / single / max. rope ø 8 mm / for sailboats
mast foot block
YC40R

Working load: 500 kg
Breaking load: 1000 kg

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UBI MAIOR ITALIA
ball bearing block / single / with swivel / max. rope ø 10 mm
ball bearing block
YC50S

Working load: 750 kg
Breaking load: 1500 kg

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UBI MAIOR ITALIA
ball bearing block / single / with swivel / with becket
ball bearing block
YC50SA

Working load: 750 kg
Breaking load: 1500 kg

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UBI MAIOR ITALIA
swivel block / single / with swivel / for sailboats
swivel block
GS314

Description: Swivel Block With Single Wheel Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

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GMTmarine
swivel block / double / with swivel / for sailboats
swivel block
GS315

Description: Swivel Block With Double Wheel Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

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GMTmarine
swivel block / single / with swivel / for sailboats
swivel block
GS3141

Description: Swivel Single Sheave Block With Bridge Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

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GMTmarine
swivel block / single / with swivel / for sailboats
swivel block
GS3141NL

Description: Swivel Single Nylon Sheave Block With Bridge Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

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GMTmarine
swivel block / double / with swivel / for sailboats
swivel block
GS3151

Description: Swivel Double Sheave Block With Bridge Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

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GMTmarine
block / plain bearing / single / for sailboats
block / plain bearing
814608

block / plain bearing / double / with fixed head / for sailboats
block / plain bearing
814609

block / plain bearing / single / with swiveling toggle / for sailboats
block / plain bearing
814609

block / plain bearing / triple / with fixed head / for sailboats
block / plain bearing
814609

cheek block / flat / double / with fork
cheek block
814619

roller bearing block / single / max. rope ø 9 mm / for sailboats
roller bearing block
3294

Working load: 1500 kg
Breaking load: 3000 kg

The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single bearing ...

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Harken
roller bearing block / single / for sailboats / carbon
roller bearing block
3295

Working load: 3000 kg
Breaking load: 6000 kg

The V block delivers another breakthrough in Harken’s loop block series for Grand-Prix racers. Harken engineers have simplified the mechanics by combining the axial and thrust bearings into a single bearing ...

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Harken
high-resistance block / single / lashing / max. rope ø 10 mm
high-resistance block
LL1060

Working load: 1000 kg

TECHNICAL CHARACTERISTICS ATTRIBUTE VALUE Ø sheave (D) 60 mm Side bearing Delrin balls Radial bearing composite fibre Weight 95 gr Ø max line 10 mm SWL 1000 kg Material Aluminum Sheave material Plastic

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Antal
block / plain bearing / single / with swivel / max. rope ø 10 mm
block / plain bearing
00501

Working load: 600 kg

TECHNICAL CHARACTERISTICS ATTRIBUTE VALUE Ø sheave (D) 50 mm Side bearing Delrin balls Radial bearing composite fibre Weight 90 gr Ø max line 10 mm SWL 600 kg Material Aluminum Sheave material Plastic Shackle Mod. 005SS

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Antal
flat block / single / with becket / for sailboats
flat block
WL/2

Compact stanchion lead system Compact furling line guide system Reduces line friction during furling Fairlead model WL/1 straightline guide for intermediate stanchions Sheave model WL/2 for line entry and exit stanchions ...

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Spinlock
cheek block / cam cleat / with fork / max. rope ø 10 mm
cheek block
BRS/50

This jammer block is for situations where a fixed foot block cant help: peeling spinnakers, or changing a sheet winch Controlled spinnaker handling Attached with webbing strop, positioned on a toe rail ...

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Spinlock
roller bearing block / single / with swivel / max. rope ø 6 mm
roller bearing block
HT 92510

Working load: 120 kg
Breaking load: 350 kg

... Material: Acetal resin 316 stainless steel straps Axle: 316 stainless steel Line size:2.5 - 6mm USAGE Control Lines Lead Blocks Vang Cascades Cunningham Systems Halyard Leads Rig Tension Systems - (Boat Breakers)

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Holt
roller bearing block / single / with swivel / with becket
roller bearing block
HT 92511

Working load: 150 kg
Breaking load: 350 kg

... Material: Acetal resin 316 stainless steel straps Axle: 316 stainless steel Line size:2.5 - 6mm USAGE Control Lines Lead Blocks Vang Cascades Cunningham Systems Halyard Leads Rig Tension Systems - (Boat Breakers)

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Holt
block / plain bearing / single / lashing / max. rope ø 6 mm
block / plain bearing
RF25109

Working load: 250 kg
Breaking load: 550 kg

Features Integrated stainless steel hub to accept lashing attachment and through-sheave becket Suits up to 4mm (5/32”) lashing Includes 750 mm (30") x 1.7mm (1/16") diam lashing

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Ronstan
cam cleat block / single / with swivel / with becket
cam cleat block
RF45130

Working load: 325 kg
Breaking load: 700 kg

Features Ultra Lightweight Low friction 2-stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating

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Ronstan
cheek block / single / for sailboats / mast
cheek block
T-fittings

Cheeky Tang fittings specifically for use on masts with t-fitting shrouds.

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Colligo Marine
friction block / single / lashing / max. rope ø 12 mm
friction block
CSS41 / CSS42 / CSS43

These lightweight aluminum blocks can be used for low movement applications like split backstays, running backs, or for setting up your own purchase system for an adjustable Backstay or Boomvang. Great for Inhaulers too! ...

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Colligo Marine
cheek block / vertical / single / max. rope ø 20 mm
cheek block
00 160 / 10 160

Working load: 275 kg
Breaking load: 550 kg

This month, we are launching the brand new Series 0 Cheek Blocks, which are ideal for use on dinghies and dayboats. Featuring both plain bearing and ball bearing options, this new design is perfect for horizontal or vertical ...

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Barton Marine
ball bearing block / single / for classic sailboats / wooden
ball bearing block
50030 / 50045 / 50060 / 50080

... launches its new "Victory" heritage range of classic, high performance wooden blocks. Combining high performance engineering and classic design, a new range of wooden blocks is being launched by Barton ...

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Barton Marine
ball bearing block / single / max. rope ø 16 mm / for sailboats
ball bearing block
801

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
ball bearing block / single / with becket / max. rope ø 16 mm
ball bearing block
802

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
ball bearing block / single / lashing / max. rope ø 8 mm
ball bearing block
HT2040T

Working load: 500 lb
Breaking load: 1600 lb

Description Working load 500 lbs Breaking load 1600 lbs Max line 5/16″~ 8mm Weight 1.4 oz

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Nautos
cheek block / single / with fork / max. rope ø 6 mm
cheek block
HT 2026

Working load: 280 lb
Breaking load: 850 lb

Description WORKING LOAD 280 LBS BRAKING LOAD 850 LBS LINE UP TO 6 MM WEIGHT 0.8 OZ SHEAVE 20 MM

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Nautos

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.