Double blocks

How to choose this product

A double block contains two sheaves. It is very widely employed because it can be used to create four- or five-line tackle, considerably increasing mechanical advantage.

Applications

Combined with a becket block, these devices can be used to make efficient five-line tackle.

Technologies

The axis of effort will be determined, in part, by the block's attachment method. Careful mounting will avoid overly large angles. Usually equipped with a ring, the block must be attached with a shackle. This should be chosen carefully to ensure that the tackle is oriented to reduce friction to a minimum.

How to choose

The diameter of the lines and the working loads will be the main elements to consider.

Advantages

- Multiples purchase by four or five

Disadvantages

- Requires a becket for maximum efficiency

34 companies | 240 products (boats or nautical equipment)

Companies per page

7 products Lewmar
Lewmar SYNCHRO
Sailboat with swivel 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 HTX
Sailboat with swivel HTX Lewmar

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

Lewmar HTX
Sailboat with becket HTX Lewmar

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

Lewmar CONTROL
Sailboat with swivel CONTROL Lewmar

Ideal for use with hand-held loads, Lewmars Control Blocks feature lightweight, performance load-bearing capacity. MRT (Metal Replacement Technology) and a stainless steel central race...

Lewmar CONTROL
Sailboat with becket CONTROL Lewmar

Ideal for use with hand-held loads, Lewmars Control Blocks feature lightweight, performance load-bearing capacity. MRT (Metal Replacement Technology) and a stainless steel central race...

32 products Wichard
Wichard 93205
Sailboat with fixed head max rope 10 mm 93205 Wichard

Commentary Systèmes d’attache: chape fixe, chape émerillon, mousqueton, sangle etc.. Applications...

Wichard 94205
Sailboat with swivel max rope 10 mm 94205 Wichard

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

Wichard 94206
Sailboat with swivel / becket max rope 10 mm 94206 Wichard

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

Wichard 95205
Sailboat with swivel max rope 12 mm 95205 Wichard

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

Wichard 95206
Sailboat with swivel / becket max rope 12 mm 95206 Wichard

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

Wichard 95220
Flat double cheek block for sailboats (max. rope : 12 mm) 95220 Wichard

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

9 products Seldén
1 products Eval
Eval 01476-25
Sailboat with swivel max rope 12 mm 01476-25 Eval

STAINLESS STEEL BLOCKS WITH DOUBLE WHEELS AND SWIVEL Code 1476-25 , Dimensions mm L...

1 products Osculati
5 products Karver Systems
Karver Systems 250 KG | KBO1
Sailboat double lashing block (max. rope: 6 mm) 250 KG | KBO1 Karver Systems

LIGHTER PURCHASE SYSTEMS Enjoy the KBO benefits by tuning your deck gear. The KBO range is available in double and triple blocks with...

Karver Systems 350 KG | KBO2
Sailboat double lashing block (max. rope: 8 mm) 350 KG | KBO2 Karver Systems

LIGHTER PURCHASE SYSTEMS Enjoy the KBO benefits by tuning your deck gear. The KBO range is available in double and triple blocks with...

Karver Systems 650 KG | KBO4
Sailboat double lashing block (max. rope: 8 mm) 650 KG | KBO4 Karver Systems

LIGHTER PURCHASE SYSTEMS Enjoy the KBO benefits by tuning your deck gear. The KBO range is available in double and triple blocks with...

Karver Systems 950 KG | KBO6
Sailboat double lashing block (max. rope: 10 mm) 950 KG | KBO6 Karver Systems

LIGHTER PURCHASE SYSTEMS Enjoy the KBO benefits by tuning your deck gear. The KBO range is available in double and triple blocks with...

Karver Systems 1.300 KG | KBO8
Sailboat double lashing block (max. rope: 12 mm) 1.300 KG | KBO8 Karver Systems

LIGHTER PURCHASE SYSTEMS Enjoy the KBO benefits by tuning your deck gear. The KBO range is available in double and triple blocks with...

2 products Ronstan
Ronstan RF79251
Mast foot for sailboats max rope 18 mm RF79251 Ronstan

The highest strength-to-weight ratio Minimal friction loss, especially...

Ronstan RF78251
Flat double cheek block for sailboats RF78251 Ronstan

The Torlon® Roller and Ball Bearing self-contained alloy sheave...

40 products Holt
Holt 600 KG | HT 92524
Sailing dinghy with fixed head max rope 6 mm 600 KG | HT 92524 Holt

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

Holt 600 KG | HT 92525
Sailing dinghy with swivel / becket max rope 6 mm 600 KG | HT 92525 Holt

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

Holt 600 KG | HT 92055
Sailboat with swivel max rope 10 mm 600 KG | HT 92055 Holt

Designed in 1997, this range of performance plastic blocks has been used by other brands....

Holt 600 KG | HT 92058
Sailboat with swivel / becket max rope 10 mm 600 KG | HT 92058 Holt

ORGANIC BEARING SYSTEM Aluminium large central axle provides a lightweight alternative to the stainless....

Holt 550 KG | HT 92020
Sailboat with swivel max rope 12 mm 550 KG | HT 92020 Holt

ORGANIC BEARING SYSTEM Aluminium large central axle provides a lightweight alternative to...

Holt 550 KG | HT 92024
Sailboat with fixed head max rope 12 mm 550 KG | HT 92024 Holt

ORGANIC BEARING SYSTEM Aluminium large central axle provides a lightweight alternative to...

29 products Harken
Harken 406
Sailing dinghy with fixed head max rope 5 mm 406 Harken

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

Harken 407
Sailing dinghy with fixed head / becket max rope 5 mm 407 Harken

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

Harken 226
Sailing dinghy with fixed head max rope 6 mm 226 Harken

Low-friction Micro blocks are compact and...

Harken 227
Sailing dinghy with fixed head / becket max rope 6 mm 227 Harken

Low-friction Micro blocks are compact and...

video Harken 2158
Sailboat double lashing block (max. rope: 6 mm) 2158 Harken

T2™ blocks come in single and double configurations and can be tied, spliced, or lashed to almost anything. T2 doubles feature composite line guides that are integrated into the block head. They...

Harken 2147
Sailboat double lashing block (max. rope: 8 mm) 2147 Harken

T2™ blocks come in single and double configurations and can be tied, spliced, or lashed to almost anything. T2 doubles feature composite line guides that are integrated into the block head. They...

10 products Allen Brothers
Allen Brothers A2022
Sailboat with fixed head A2022 Allen Brothers

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

Allen Brothers A2033
Sailboat with fixed head / becket max rope 10 mm A2033 Allen Brothers

With the Allen dynamic bearing technology at the heart of this block, the line friendly soft contours...

Allen Brothers A2062
Sailboat with fixed head max rope 14 mm A2062 Allen Brothers

A2062 60mm Dynamic Block Double The 60mm dynamic block range was designed particularly...

Allen Brothers A4569
Double wire-block with fixed head for sailboats (max. wire : 4 mm) A4569 Allen Brothers

The Allen high tension stainless steel block range is specifically intended...

Allen Brothers A4669
Double wire-block with fixed head / becket for sailboats (max. wire : 4 mm) A4669 Allen Brothers

The Allen high tension stainless steel block range is specifically intended...

Allen Brothers A4081
Double thru-deck wire-block for sailboats (max. wire : 5 mm) A4081 Allen Brothers

Lightweight Plain Bearing Light weight plain bearing block. With...

6 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 = 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....

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

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

1 products Nemo Industrie
Nemo Industrie
Flat double cheek block for sailboats (max. rope : 12 mm) Nemo Industrie

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

1 products Andersen
Andersen
Flat double cheek block for sailboats Andersen

ANDERSEN’s polished stainless steel Turning Blocks provide the perfect finishing touch...

11 products RWO
RWO R1570
Sailing dinghy with fixed head max rope 6 mm R1570 RWO

Description:Block Micro Double Category:Blocks Subcategory:17...

RWO R1640
Sailing dinghy thrudeck max rope 6 mm R1640 RWO

Description:Block Micro Double Box Category:Blocks Subcategory:17...

RWO R4969
Sailboat with fixed head / becket max rope 6 mm R4969 RWO

Description:Vang Double Block Micro Category:Blocks Subcategory:17...

RWO R8540 - BL = 300 KG
Sailing dinghy with swivelling hook max rope 6 mm R8540 - BL = 300 KG RWO

Description:18mm Micro Triple & Hook Category:Blocks Subcategory:17...

RWO R1647
Sailing dinghy thrudeck max rope 4 mm R1647 RWO

Category:Blocks Subcategory:18 Block Series Series:High...

RWO R5108
Sailing dinghy thrudeck max rope 6 mm R5108 RWO

Description:19 Mx Block Double Category:Blocks Subcategory:19...

27 products Sprenger
Sprenger 35069 010 55
Sailing dinghy with fixed head / becket max rope 6 mm 35069 010 55 Sprenger

Your advantages: sliding bearing strongly loadable cheek parts stainless steel wobble...

Sprenger 35067 010 55
Sailing dinghy with fixed head max rope 6 mm 35067 010 55 Sprenger

Your advantages: sliding bearing strongly loadable cheek parts stainless steel wobble...

Sprenger 35072 010 55
Sailing dinghy with swivelling hook max rope 6 mm 35072 010 55 Sprenger

Your advantages: sliding bearing strongly loadable cheek parts stainless steel wobble...

Sprenger 35120 002 55
Sailing dinghy with fixed head / Vcleat max rope 6 mm 35120 002 55 Sprenger

Your advantages: sliding bearing strongly loadable cheek parts stainless steel wobble...

Sprenger 35251 600 00
Sailboat with fixed head max rope 8 mm 35251 600 00 Sprenger

Your advantages: easily running plastic ball bearing enhancing strap of stainless steel wobble riveting:...

Sprenger 35254 600 00
Sailboat with fixed head / becket max rope 8 mm 35254 600 00 Sprenger

Your advantages: easily running plastic ball bearing enhancing strap of stainless steel wobble riveting:...

2 products Dryade
Dryade
For classic sailboats Dryade

Classic Blocks Combining the traditional cabinet-making skills of the Jura Mountain region with the micro technique and watch making expertise of the Haut-Doubs, Dryade blocks emphasise the timeless...

Dryade
Sailboat with fixed head / becket / camcleat Dryade

These special blocks are available : • Backstay block for ropes (BAS 401 - BAS 501 - BAS 601 ...) ; •...

La Nantaise de Poulies 1FA240D - SWL 2200
For classic sailboats 1FA240D - SWL 2200 La Nantaise de Poulies

Double Hand Strap "Force I " 25mm Fonctionnalities Double Hand Strap Optional Becket Optional...

La Nantaise de Poulies 2FA150D - SWL 900
For classic sailboats 2FA150D - SWL 900 La Nantaise de Poulies

Fonctionnalities Double Hand Strap Optional Becket Optional Rope Specifications Force II blocks are made in order to join together the design features and the highest esthetics...

La Nantaise de Poulies DA60 - SWL 150
For classic sailboats DA60 - SWL 150 La Nantaise de Poulies

Fonctionnalities Double Hand Strap Optional Becket Optional Rope Specifications Ash...

La Nantaise de Poulies DOE60 - SWL 150
For classic sailboats DOE60 - SWL 150 La Nantaise de Poulies

Double hand Swivel Strap 10mm Fonctionnalities Double Hand with Swivel Strap Optional...

La Nantaise de Poulies 2FA90D - SWL 350
For classic sailboats 2FA90D - SWL 350 La Nantaise de Poulies

Double Hand Strap Force II 12mm Fonctionnalities Double Hand Strap Optional Becket Optional Rope Specifications Force II blocks are made in order to join together the design features...

La Nantaise de Poulies 2FA125D - SWL 600
For classic sailboats 2FA125D - SWL 600 La Nantaise de Poulies

Fonctionnalities Double Hand Strap Optional Becket Optional Rope Specifications Force II blocks are made in order to join together the design features and the highest esthetics...

Esprit Yachting
For classic sailboats Esprit Yachting

Wooden blocks by Esprit Yachting is a complet range of...

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Associated Terms

double pulley wheels, double sheaves, double pulleys, marine double blocks

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