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A triple block has three sheaves, sometimes with metal or plastic ball bearings.
Such blocks can be part of six- or seven-line tackle. This degree of mechanical advantage is particularly useful on downhauls, running backstays and wherever loads are especially heavy.
The manner in which the lines are passed through the sheaves is essential. They must cross at the right place to avoid rubbing against each other. The final line must run over the middle sheave, which is aligned with the block's attachment point to ensure the most efficient distribution of the effort.
The line type and diameter, and the working load will determine the choice of block.
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Sailboat triple block with swivel / becket / cam-cleat (max. line ø : 10 mm) 95308 Wichard
Commentary Complete range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment...
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Sailboat triple lashing block (max. rope ø : 6 mm) 350 KG | KBO1 TRIPLE 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...
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Sailboat triple block with swivel HTX Lewmar
HTX Blocks Cruising and Racing Blocks Available Spring...
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Sailboat triple block with swivel (max. line ø : 12 mm) PBB 50 - SWL = 700 KG Seldén
PBB 50 FEATURES Acetal sheave. Stainless steel strap for...
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Sailboat triple block with swivel (max. line ø : 8 mm) 344 Harken
The 29 mm Carbo block is like jewelry. This compact block is extremely strong. Use our miniature Carbo as a mainsheet block on small dinghies such as the Optimist,...
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Sailboat triple block with swivel (max. line ø : 12 mm) RF70300 - M.W.L - 1250 kg Ronstan
Low friction, 2-stage ball bearing system High static...
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Sailboat triple block with swivel (max. line ø : 10 mm) HT 92061 Holt
ORGANIC BEARING SYSTEM Aluminium large central axle provides a lightweight alternative to the stainless....
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Sailboat triple block with swivel (max. line ø : 8 mm) BL = 850 KG Rutgerson
The Rutgerson block assortment is unique in its design and functionallity....
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Sailboat triple block with becket (max. line ø : 6 mm) A2025 Allen Brothers
20mm Dynamic Block The Allen 20mm dynamic bearing block is simply the best...
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Sailboat triple block with swivelling toggle Hi-MOD Petersen Stainless
The Hi-MOD Marine Blocks are a simple and durable cruising block which work well under heavy loads and are less prone to jamming . Made...
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Advantages: •easily running ball bearing stainless steel •bearing shell and balls of stainless steel •wobble riveting:...
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Sailboat triple block with fixed head 19.86 Sea Sure
Treble Ball Race Block with shackle,19mm 19mm carbon fibre cheeked ball race blocks . Light weight, high load carrying capacity blocks . Reliable race proven designs . High wear resistant cheek material extends...
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Triple block for classic sailboats Dryade
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 qualities of wood and bronze. Blending tradition and modernity, the blocks bring beauty and performance to rigging....
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Triple block for classic sailboats 2FA150D - SWL 650 La Nantaise de Poulies
Fonctionnalities Triple Hand Strap Optional Becket Optional Rope Specifications Force II blocks are made in order to join together the design features and the highest esthetics...
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Our High Performance blocks are developed with emphasis on design and strength. The blocks have aluminium ball...
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Triple block for classic sailboats Maritime Enterprises I.O.W.
Our 'Maritime' range of blocks are made to the highest possible...
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Triple block for classic sailboats Esprit Yachting
Wooden blocks / Poulies bois par Esprit Yachting...
