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cam cleat block / cheek / vertical / built-in
cam cleat block
HT925XX Serie

Working load: 120 kg - 300 kg
Breaking load: 550, 350, 400, 600 kg

20MM MININOX BLOCKS STAINLESS CHEEKS Large window to reduce weight and allow easy rinsing ROLLER BEARING SYSTEM Delrin needle bearing enables high static load applications TECHNICAL Sheave: Diameter - 20mm Width: ...

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Holt
built-in block / single / with fork / max. rope ø 8 mm
built-in block
110

Working load: 136 kg
Breaking load: 907 kg

Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications.

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Harken
built-in block / ball bearing / single / max. rope ø 5 mm
built-in block
RF15711

Working load: 120 kg
Breaking load: 550 kg

FEATURESSmallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low frictionSingle loop head blocks include an O-ring to separate running line ...

built-in block / single / with fork / max. rope ø 12 mm
built-in block
3526550200

Versatile cheek block for 12 mm rope with easy running stainless steel ball bearing. Further advantages at a glance: side parts and pulley made of UV-resistant, glass-fibre reinforced plastic no sharp ridges on the rivet ...

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SPRENGER
built-in block / single / max. rope ø 8 mm / for sailboats
built-in block
A2131

Working load: 140 kg
Breaking load: 500 kg

Allen 30mm Dynamic Blocks use the same high quality Dynamic bearing, materials and precision engineering as our 20mm Dynamic Block range. Our high strength and rope friendly stainless steel ultra-strap makes them amongst the strongest ...

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Allen Brothers
built-in block / single / with fork / max. rope ø 6 mm
built-in block
R1600

Description:Block Micro Thru-Deck Category:Blocks Subcategory:17 Block Series Series:Stainless Block Type:Single Bearing Type:Plain Weight (grm):9 Sheave Diameter (mm):17 Note:Uses M3 Fastenings Sheave Material:Acetal Rope Size (mm):6

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RWO
built-in block / double / max. rope ø 10 mm / for sailboats
built-in block
92329

Working load: 300 lb
Breaking load: 1,850 lb

Description CONVENTIONAL BALL BEARING DESIGN WITH LONG LASTING CHARACTERISTICS. OPTIONAL WITH ALUMINUM SHEAVE ON ROLLER BEARINGS FOR HIGHER LOADS. WORKING LOAD 300 LBS BREAKING LOAD 1850 LBS LINE UP TO 10 MM / 3/8″ SHEAVE DIAMETER ...

built-in block / ball bearing / cheek / single
built-in block
SB-1611F

Working load: 120 kg
Breaking load: 550 kg

Master's smallest block, 16mm is designed for small synthetic control lines found on dinghies. Stainless Steel Ball Bearing provides the good and smooth rotation and polished 316 L Stainless Steel sideplates give optimal maximum working load.

built-in block / single / for sailboats / plastic
built-in block
87A

DATA SHEET DimensionsØ 50 x 9 mm Nylon pulleys with brass support. Plain.

How to choose this product

built-in-block

A through-deck block is designed to be let into a dedicated recess in mast or deck so that lines can run within without protruding.

Applications

Such blocks can be used to run halyards or topping lifts within the mast or sheets, roller furling and other lines invisibly beneath the deck.

Technologies

As with other types, these blocks can be simple friction blocks or use ball or roller bearings. Roller bearings offer the best results, but are also more expensive. Most are made of stainless steel or aluminum. High-tech, titanium models, the most expensive, also provide the best strength/weight ratio.

Each model is designed for a specific line diameter, and maximum working and breaking loads, which must be respected. Through-deck blocks can have one or two sheaves, either in line or side-by-side.

How to choose

Choice will depend on line diameter and maximum anticipated load. Double-sheave versions require only one aperture for two lines. Block type, friction, ball or roller bearing, will depend on budget and load requirements.