Single blocks

How to choose this product

A single block has only one sheave. Models differ in size, sturdiness, attachment and bearing systems.

Applications

Such blocks can be used in two-line block and tackle, as an intermediary pulley in multi-block tackle or as a line lead block.

Technologies

Each of the many different attachment systems is appropriate for a particular type of block. There are two main bearing configurations. In blocks with mechanical or plastic ball bearings, two sets of bearings support the load in races on either side of the sheave.

Roller bearings sit in pairs between the races within the sheave. While sometimes found in small blocks, they are more often used in large-diameter models, as they can support higher loads and wear more slowly.

How to choose

Line diameter and working load will be the main choice criteria. Manufacturers include detailed technical information in their catalogs.

48 companies | 759 products (boat or nautical equipment)

Companies per page

6 products Osculati
20 products Lewmar
Lewmar SYNCHRO
Sailboat SYNCHRO Lewmar

Lewmar synchro block are engineered for speed, efficiency and superior handling. We use a combination of scientifically optimised block geometry, a Free-Spin bearing and self-aligning head to reduce friction...

Lewmar SYNCHRO
Sailboat with becket SYNCHRO Lewmar

Lewmar synchro block are engineered for speed, efficiency and superior handling. We use a combination of scientifically optimised block geometry, a Free-Spin bearing and self-aligning head to reduce friction...

Lewmar SYNCHRO
Sailboat with swivel / becket / camcleat SYNCHRO Lewmar

Lewmar synchro block are engineered for speed, efficiency and superior handling. We use a combination of scientifically optimised block geometry, a Free-Spin bearing and self-aligning head to reduce friction...

Lewmar SYNCHRO
Single cheek block for sailboats SYNCHRO Lewmar

Lewmar’s Synchro footblocks use alloy cheeks, fixing isolators and to prevent sealant from getting into the...

Lewmar HTX
Sailboat HTX Lewmar

Size 50, 60, 72 and 90mm available: select your size in the menu above...

Lewmar HTX
Sailboat with becket HTX Lewmar

Size 50, 60, 72 and 90mm available: select your size in the menu above...

72 products Wichard
Wichard MXL6
Sailboat single friction block with lashing (max. rope: 8 mm) MXL6 Wichard

When used in conjunction with heavy loads (mastfoot block, spinnaker tack point), normal friction blocks are heavy and take up space. Following on from our success with the MX halyard shackle, Wichard...

Wichard MXL8
Sailboat single friction block with lashing (max. rope: 10 mm) MXL8 Wichard

When used in conjunction with heavy loads (mastfoot block, spinnaker tack point), normal friction blocks are heavy and take up space. Following on from our success with the MX halyard shackle, Wichard...

Wichard MXL10
Sailboat single friction block with lashing (max. rope: 14 mm) MXL10 Wichard

When used in conjunction with heavy loads (mastfoot block, spinnaker tack point), normal friction blocks are heavy and take up space. Following on from our success with the MX halyard shackle, Wichard...

Wichard 90105
Sailboat with swivel 90105 Wichard

Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head...

Wichard 90106
Sailboat with swivel / becket max rope 10 mm 90106 Wichard

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

Wichard 93105
With swivel for sailboats max line ø 10 mm 93105 Wichard

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

39 products Seldén
34 products Karver Systems
Karver Systems 150 KG | KBO1
Sailboat single lashing block (max. rope: 6 mm) 150 KG | KBO1 Karver Systems

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...

Karver Systems 220 KG | KBO2
Sailboat single lashing block (max. rope: 8 mm) 220 KG | KBO2 Karver Systems

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...

Karver Systems 400 KG | KBO4
Sailboat single lashing block (max. rope: 8 mm) 400 KG | KBO4 Karver Systems

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...

Karver Systems 600 KG | KBO6
Sailboat single lashing block with integrated becket (max. rope: 10 mm) 600 KG | KBO6 Karver Systems

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...

Karver Systems 850 KG | KBO8
Sailboat single lashing block (max. rope: 12 mm) 850 KG | KBO8 Karver Systems

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...

Karver Systems 1.200 KG | KBO10
Sailboat single lashing block (max. rope: 12 mm) 1.200 KG | KBO10 Karver Systems

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...

1 products Eval
Eval 01479-25
Single wire-block with swivel for sailboats (max. wire: 10 mm) 01479-25 Eval

STAINLESS STEEL BLOCKS WITH SINGLE WHEEL AND SWIVEL Code 1479-25 , Dimensions...

108 products Harken
Harken 376
Sailing dinghy with fixed head max rope 5 mm 376 Harken

The 16 mm is Harkens® smallest block. It is perfect for small...

Harken 391
Sailing dinghy with swivelling hook max rope 5 mm 391 Harken

The 16 mm is Harkens® smallest block. It is perfect for small...

Harken 405
Sailing dinghy with fixed head / becket max rope 5 mm 405 Harken

The 16 mm is Harkens smallest block. It is perfect for small...

Harken 416
Single flat cheek block for sailing dinghy (max. rope : 5 mm) 416 Harken

The 16 mm is Harkens® smallest block. It is perfect for small...

Harken 417
Sailing dinghy with swivel max rope 5 mm 417 Harken

The 16 mm is Harkens® smallest block. It is perfect for small...

Harken 442
Sailing dinghy with deck plate max rope 5 mm 442 Harken

The 16 mm is Harkens® smallest block. It is perfect for small synthetic control...

99 products Holt
Holt 350 KG | HT 92510
Sailing dinghy with swivel max rope 6 mm 350 KG | HT 92510 Holt

STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle...

Holt 350 KG | HT 92511
Sailing dinghy with swivel / becket max rope 6 mm 350 KG | HT 92511 Holt

STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle...

Holt 550 KG | HT 92514
Sailing dinghy with fixed head max rope 6 mm 550 KG | HT 92514 Holt

STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle...

Holt 550 KG | HT 92515
Sailing dinghy with fixed head / becket max rope 6 mm 550 KG | HT 92515 Holt

STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle...

Holt 400 KG | HT 92516
Upright single cheek block for sailboats (max. wire: 6 mm) 400 KG | HT 92516 Holt

STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle...

Holt 400 KG | HT 92519
Sailing dinghy thrudeck max rope 6 mm 400 KG | HT 92519 Holt

STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle...

24 products Ronstan
Ronstan RF64100
Sailboat with swivel max rope 12 mm RF64100 Ronstan

Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less...

Ronstan RF74140
Sailboat standup RF74140 Ronstan

Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less...

Ronstan RF25109
Sailboat single lashing block (max. rope: 6 mm) RF25109 Ronstan

Integrated stainless steel hub to accept lashing...

Ronstan RF45130
Sailboat with swivel / becket / camcleat RF45130 Ronstan

Ultra Lightweight Low friction 2-stage...

Ronstan RF75151
Single flat cheek block for sailboats (max. rope: 12 mm) RF75151 Ronstan

Ultra Lightweight Low friction 2-stage Orbital ball bearing...

Ronstan RF56101
Sailboat with dyneema® fixed head max rope 10 mm RF56101 Ronstan

Automatic and Manual ratchet in one block Up...

23 products Antal
Antal MINI 34X6
Sailboat MINI 34X6 Antal

This series offers extremely high working loads (SWL = 400 Kg) while still compact and lightweight. The sheave is made of resin with a double lateral ball-bearing. Cheekplates are made of perfectly polished...

Antal 50 -  SWL = 600 KG
Sailboat with swivel 50 - SWL = 600 KG Antal

New by Antal the One Piece Frame block, the block without pins or screws, it is a light and strong solution: simply a hard black anodized and...

Antal SERIE OPF
Sailboat with swivel SERIE OPF Antal

New by Antal the One Piece Frame block, the block without pins or screws, it is a light and strong solution: simply a hard black anodized and...

Antal 70 - SWL = 1300 KG
Sailboat with swivel 70 - SWL = 1300 KG Antal

New by Antal the One Piece Frame block, the block without pins or screws, it is a light and strong solution: simply a hard black anodized and...

Antal 80 - SWL = 2200 KG
Sailboat with swivel 80 - SWL = 2200 KG Antal

New by Antal the One Piece Frame block, the block without pins or screws, it is a light and strong solution: simply a hard black anodized and...

Antal 120 - SWL = 5000 KG
Sailboat with swivel 120 - SWL = 5000 KG Antal

New by Antal the One Piece Frame block, the block without pins or screws, it is a light and strong solution: simply a hard black anodized and...

2 products Spinlock
Spinlock WL/2
Sailboat for stanchion WL/2 Spinlock

Compact stanchion lead system Compact furling line guide system Reduces line friction during...

Spinlock BRS/63
Single cheek block with jamming cam for sailboats (max. rope: 12 mm) BRS/63 Spinlock

This jammer block is for situations where a fixed foot block can’t help: peeling spinnakers, or changing...

Bainbridge international RWR1242
Sailboat with becket RWR1242 Bainbridge international

Race winning demands for ultimate sail control and rig tensions has generally resulted in far more load on block systems. These hi-performance blocks are specifically...

47 products Allen Brothers
Allen Brothers A2020
Sailboat A2020 Allen Brothers

The Allen 20mm dynamic bearing block is simply the best designed...

Allen Brothers A2021
Sailboat with fixed head A2021 Allen Brothers

20mm Dynamic Block The Allen 20mm dynamic bearing block is simply the best...

Allen Brothers A2021F
Sailboat A2021F Allen Brothers

20mm Dynamic Block The Allen 20mm dynamic bearing block is simply the best...

Allen Brothers A2021HK
Sailboat A2021HK Allen Brothers

20mm Dynamic Block The Allen 20mm dynamic bearing block is simply the best...

Allen Brothers A2026
Single flat cheek block for sailboats (max. rope: 6 mm) A2026 Allen Brothers

20mm Dynamic Block The Allen 20mm dynamic bearing block is simply the best...

Allen Brothers A4502
Upright single cheek block for sailboats (max. rope: 6 mm) A4502 Allen Brothers

20mm Dynamic Block The Allen 20mm dynamic bearing block is simply the best...

Foresti & Suardi 87A
Sailboat plastic 87A Foresti & Suardi

Nylon pulleys with brass support Specifications Art....

Foresti & Suardi 87D
Sailboat with swivel 87D Foresti & Suardi

Nylon pulleys with brass support Specifications Art....

20 products Rutgerson
Rutgerson BL = 850 KG
Sailboat with swivel max rope 8 mm BL = 850 KG Rutgerson

The Rutgerson block assortment is unique in its design and functionallity....

Rutgerson BL = 1250 KG
Sailboat with swivel max rope 12 mm BL = 1250 KG Rutgerson

The Rutgerson block assortment is unique in its design and functionallity....

Rutgerson BL = 2100 KG
Sailboat with swivel max rope 14 mm BL = 2100 KG Rutgerson

The Rutgerson block assortment is unique in its design and functionallity....

Rutgerson BL = 3800 KG
Sailboat with swivel max rope 14 mm BL = 3800 KG Rutgerson

The Rutgerson block assortment is unique in its design and functionallity....

Rutgerson BL = 850 KG
Sailboat with swivel / becket max rope 8 mm BL = 850 KG Rutgerson

The Rutgerson block assortment is unique in its design and functionallity....

Rutgerson BL = 1250 KG
Sailboat with swivel / becket max rope 12 mm BL = 1250 KG Rutgerson

The Rutgerson block assortment is unique in its design and functionallity....

1 products Nemo Industrie
Nemo Industrie
Single flat cheek block for sailboats (high load, max. rope: 24 mm) Nemo Industrie

Light anodised alloy and stailess steel AISI 316 with derling...

33 products RWO
RWO R1242
Sailboat with fixed head / becket R1242 RWO

Description:15mm Hi-Per Single & Bkt Category:Blocks Subcategory:15...

RWO R1530
Sailing dinghy with fixed head max rope 6 mm R1530 RWO

Description:18mm Block Micro Single Category:Blocks Subcategory:17...

RWO R1550
Sailboat R1550 RWO

Description:18mm Block Micro Single Category:Blocks Subcategory:17...

RWO R1560
Sailing dinghy with fixed head max rope 6 mm R1560 RWO

Description:18mm Block Micro Single Category:Blocks Subcategory:17...

RWO R1563
Sailing dinghy with fixed head max rope 6 mm R1563 RWO

Description:Blockmicro Single Category:Blocks Subcategory:17...

RWO R1580
Single flat cheek block for sailboats (max. rope: 6 mm) R1580 RWO

Description:Blockmicro Cheek & Uprite Category:Blocks Subcategory:17...

Equiplite Europe
Sailboat single snatch-block Equiplite Europe

Equiplite™ Snatch Blocks use DSK 75 ULTRA loops to take the loads directly through the centre of the sheave....

Equiplite Europe
Sailboat spinnaker Equiplite Europe

Equiplite™ Spinnaker blocks are similar in design to Equiplite™ snatch blocks but employ...

Equiplite Europe  VHI
For sailboat runner VHI Equiplite Europe

Equiplite™ Runner | Mainsheet and Traveler, Blocks For High Performance yachts and especially...

Equiplite Europe  ULTRALIGHT
Sailboat with fixed head / becket ULTRALIGHT Equiplite Europe

Equiplite™ Runner Becket Blocks. By reducing the maximum on the carbon becket which is possible of the use of the technology...

Equiplite Europe
Sailboat standup Equiplite Europe

Use Equiplite™ Snatch Blocks in combination with soft deck...

new Optiparts - Windesign EX1328
For sailing dinghy EX1328 Optiparts - Windesign

New plainbearing Windesign injection moulded blocks. Nylon...

Optiparts - Windesign EX1325
Sailing dinghy with becket max rope 8 mm EX1325 Optiparts - Windesign

Plainbearing Windesign injection moulded blocks. Nylon cheeks...

Optiparts - Windesign
With hook for sailing dinghy Optiparts - Windesign

Hook-in blocks EX1340 Hook-in block, as used on SILVER mast, with plain bearing Aluminum...

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Associated Terms

single sheaves, single pulleys

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