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Working load: 250 kg
Breaking load: 500 kg
The KBO blocks are our mainstream range of lashing block. The KBO blocks are available in simple, double and triple up to the KBO8. From the KBO1 to the KBO8, the blocks ...
Karver Systems
Working load: 350 kg
Breaking load: 700 kg
The KBO blocks are our mainstream range of lashing block. The KBO blocks are available in simple, double and triple up to the KBO8. From the KBO1 to the KBO8, the blocks ...
Karver Systems
Working load: 650 kg
Breaking load: 1,300 kg
The KBO blocks are our mainstream range of lashing block. The KBO blocks are available in simple, double and triple up to the KBO8. From the KBO1 to the KBO8, the blocks ...
Karver Systems
Working load: 320 kg
Breaking load: 700 kg
Double plain bearing block - Sheave 18 - Fixed eye Description Complete range of plain bearing blocks Modern design > Withstand high loads Ideal for static operations The sheave ...
Wichard
Working load: 480 kg
Breaking load: 900 kg
Double plain bearing block - Sheave 35 - Swivel head Description Complete range of plain bearing blocks Modern design Withstand high loads Ideal for static operations The sheave ...
Wichard
Working load: 480 kg
Breaking load: 1,000 kg
Double plain bearing block - Sheave 45 - Swivel head Description Complete range of plain bearing blocks Modern design Withstand high loads Ideal for static operations The sheave ...
Wichard
Working load: 650 kg
Breaking load: 1,300 kg
SPECIFICATIONS Weight: 217.00 g Safe working Load: 650 kg Breaking Load: 1300 kg Max line size: 12 mm Pin diam: 5 mm Shackle diam: 5 mm Purchase: 4 Mounting: 0 90 free
Seldén Mast AB
Working load: 1,000 kg
Breaking load: 2,000 kg
SPECIFICATIONS Weight: 378.00 g Safe working Load: 1000 kg Breaking Load: 2000 kg Max line size: 14 mm Pin diam: 6 mm Shackle diam: 6 mm Purchase: 5 Mounting: 0 90 free Comment: Becket can be opened
Seldén Mast AB
Working load: 1,000 kg
Breaking load: 2,000 kg
SPECIFICATIONS Weight: 404.00 g Breaking Load: 2000 kg Safe working Load: 1000 kg System: PBB60 Max line size: 14 mm Upper breaking load: 10.00 kN Upper safe working load: 5.00 kN Mounting: 3xM6 Comment: Screw ...
Seldén Mast AB
Working load: 204 kg
Breaking load: 544 kg
The 16 mm is Harkens® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race.
Harken
Working load: 800, 1,100, 2,000, 3,500 kg
... Lewmar HTX Hardware Range. Drawing upon the design of the Racing Range, the HTX blocks are constructed simply from high quality materials, providing enhanced reliability. HTX blocks are ideal for frequently ...
Lewmar
Working load: 1,800, 1,440 kg
Lewmar's Racing Blocks represent the pinnacle of our standard block range. Manufactured from the best materials, they offer incredible strength to weight ratios. Features Lockable head pin Highly ...
Lewmar
Working load: 800, 1,100, 450 kg
... swivel locking mechanism Applications Plain bearing blocks are typically used for heavy and static loads in: Halyard tuning Mainsheet systems Mast foot blocks Mast head blocks ...
Lewmar
Working load: 240 kg
Breaking load: 700 kg
... FEATURES Smallest and lightest ball bearing block available Precision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction Single loop head blocks ...
Working load: 200, 400 kg
Breaking load: 600, 650 kg
... Cheeks: Glass filled nylon Axle: Aluminium Dyn Axle: 316 Stainless Line size:5 -12vmm USAGE 40MM RANGE Sheet Blocks Foot Blocks / Leads Backstay systems
Holt
Working load: 450 kg
Breaking load: 850 kg
Double block with spherical plain bearing and composite sides and sheaves
Rutgerson
Working load: 700 kg
Breaking load: 1,250 kg
Double block with spherical plain bearing and composite sides and sheaves
Rutgerson
Working load: 1,150 kg
Breaking load: 2,100 kg
Double block with spherical plain bearing and composite sides and sheaves
Rutgerson
Working load: 200, 300 kg
Fixed Pulley Type TR Vertical Double Sheave PAT. *Materials: SCS13 (equivalent to SUS304) Sheave pin: SUS304 *TR-B contains bearings.
Dobbelt block with tufnol roller and stanless steel berings. Brass plate on side
Description: Swivel Double Sheave Block With Bridge Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)
Working load: 9,000 kg
Breaking load: 18,000 kg
Our High Performance blocks are developed with emphasis on design and strength. The blocks have aluminium ball bearing sheaves and are bolted together with allen screws for easy disassembling if needed. The ...
OH MARINE EQUIPMENT
Breaking load: 1,250 kg
Plain Bearing Double The A2032P is a plain bearing version of our A2032 dynamic cheek block. The A2032P is made using 100% recycled plastics and the well-known Allen UltraStrap. Ideal for elastic take ...
Allen Brothers
Versatile Micro XS cheek block for 6 mm rope, which is characterised by its particularly low weight. The cage and bearing shells are made of robust stainless steel, the cover plates are made of black, UV-resistant ...
SPRENGER
Description:Block Micro Double Category:Blocks Subcategory:17 Block Series Series:Stainless Block Type:Double Bearing Type:Plain Weight ...
RWO
Working load: 160 kg - 540 kg
Our wooden blocks are specifically designed for traditional boats. Its are commonly called "Havraise blocks". Its are ash, copper riveted. The sheave is Céloron, the handle and shaft are in stainless ...
Working load: 160 kg - 540 kg
Our wooden blocks are specifically designed for traditional boats. Its are commonly called "Havraise blocks". Its are ash, copper riveted. The sheave is Céloron, the handle and shaft are in stainless ...
Working load: 550 lb
Breaking load: 2,000 lb
Description CONVENTIONAL BALL BEARING DESIGN WITH LONG LASTING CHARACTERISTICS. OPTIONAL ALUMINUM SHEAVE ON ROLLER BEARINGS FOR HIGHER LOADS. WORKING LOAD 550 LBS BREAKING LOAD 2000 LBS WEIGHT 4 OZ. MAX LINE 5/16″
Nautos
Double Block with Front Side Shackle and Becket. Use with either 02-23 or 02-24 for a strong 4:1 purchase. Length = 4 5/32" (106mm), Width = 1 3/16" (30mm), Thickness 1 1/8" (28mm), Weight = 3 oz. (85g)
Hvalpsund Net offers a wide range of miscellanious, high quality steel goods. Take a look at our products:
MAME BLOCK, DOUBLE WHEELS, WITH RING WELDED, STAINLESS 304, STAINLESS SHEAVE WITH BRASS BUSHING.
"00" Double Block with Becket SKU: 00.23 25mm Double Block with Becket Category: 25mm blocks RRP: £16.74
Stainless Steel Blocks length: 3-7/8 width: 2-3/8 weight: 1 lb. shackle: sheave diameter: 2-1/8 Made with ball bearing sheaves
Garhauer Marine
BLOCK INTERNAL BINDING WITH SISTERHOOKS Two versions: * Bindings: aluminium-bronze with Sheave: aluminium-bronze * Bindings: stainless steel 316 with Sheave: delrin Wood: elm or teak Construction: ...
Breaking load: 2,000, 2,300, 3,400 kg
ΙΝΟΧ BLOCKS WITH DOUBLE WHEELS AND SWIVEL Code 1476-25 , Dimensions mmL 103 x W 30 x D 12 , Diam. mm8 -10 , Breaking Load Kg 2000 Code 1476-32 , Dimensions mmL 116 x W 36 x D 12 , Diam. mm8 ...
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
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