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Working load: 120 kg - 300 kg
Breaking load: 350, 550, 600, 400 kg
Weight: 24, 28, 26, 32, 12 g
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: 7mm Material: Acetal ...
Holt
Working load: 250 kg
Breaking load: 500 kg
Weight: 37 g
When you race HARD, and you rip through as many hoists and douses as we do sailing W-L legs all the time, you should expect to start wearing through the sideplates of your halyard exit block right? Wrong! Thanks to Harken Protexit™ blocks, ...
Harken
Working load: 1,800 kg
Breaking load: 3,600 kg
Weight: 93 g
SHEAVE: 55mm MAX Ø LINE: 14m MAX WORKING LOAD: 1800Kg BREAKING LOAD: 3600Kg LENGTH: 71mm WEIGHT: 93g
UBI MAIOR ITALIA
Working load: 450 kg
Center diameter: 45 mm
Weight: 80 g
Length (L) - 72 mm Width (W) - 23 mm Height (H) - 55 mm Ø sheave (D) - 45 mm Side bearing - Delrin balls Weight - 0,08 kg Ø max line - 10 mm A - 20 mm SWL - 450 kg Material - S.steel Sheave material - Plastic Fixing screws - 2 x 5 mm
Working load: 112 kg
Breaking load: 450 kg
Weight: 28 g
smooth-running ball bearing, bearing body and balls made of stainless steel wobble riveting avoids sharp burrs at the rivet head cheek parts made of stainless steel and sheaves 19 x 8,3 mm of high quality UV-resistant plastic very ...
SPRENGER
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 ...
Allen Brothers
Working load: 2,000 kg
Breaking load: 4,000 kg
Weight: 350 g
» Aluminum material with high strength, delicacy appearance, longer block life » Preservative treatment Use for: Mastbase halyard Head
Center diameter: 44 mm
Weight: 100 g
For roping: up to 12mm Roll: Aluminum Roller 44×12mm with slide bearing Housing: 107×47×33mm Weight: 100g 2 screws Ø 4mm Hole clearance: 88mm Colour: black
Pfeiffer Marine GmbH
Nylon pulleys with brass support DimensionsØ 50 x 9 mm Plain. Finish .L Polished .C Chromed
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.
ApplicationsSuch blocks can be used to run halyards or topping lifts within the mast or sheets, roller furling and other lines invisibly beneath the deck.
TechnologiesAs 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.
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.
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