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snatch block / single / lashing / max. rope ø 12 mm
snatch block
KBO10

Working load: 1200 kg

... guide and rope shackle attachment simplifies the use of the KBO block. +LIGHTWEIGHT - The design and material optimisation make the block extremely light. +PERFORMANCE - The KBO block ...

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Karver Systems
snatch block / single / lashing / max. rope ø 14 mm
snatch block
KBO15

Working load: 1800 kg

... guide and rope shackle attachment simplifies the use of the KBO block. +LIGHTWEIGHT - The design and material optimisation make the block extremely light. +PERFORMANCE - The KBO block ...

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Karver Systems
snatch block / single / lashing / max. rope ø 14 mm
snatch block
KBO20

Working load: 2600 kg

... guide and rope shackle attachment simplifies the use of the KBO block. +LIGHTWEIGHT - The design and material optimisation make the block extremely light. +PERFORMANCE - The KBO block ...

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Karver Systems
snatch block / single / lashing / max. rope ø 16 mm
snatch block
KBO30

Working load: 3500 kg

... guide and rope shackle attachment simplifies the use of the KBO block. +LIGHTWEIGHT - The design and material optimisation make the block extremely light. +PERFORMANCE - The KBO block ...

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Karver Systems
snatch block / single / lashing / for sailboats
snatch block
KBO50

Working load: 5000 kg

... guide and rope shackle attachment simplifies the use of the KBO block. +LIGHTWEIGHT - The design and material optimisation make the block extremely light. +PERFORMANCE - The KBO block ...

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Karver Systems
plain bearing block / single / with fixed head / max. rope ø 6 mm
plain bearing block
PBB20

Working load: 70 kg
Breaking load: 140 kg

Specifications Weight: 6.00 g Safe working Load: 70 kg Breaking Load: 140 kg Max line size: 6 mm System: PBB20 Block type: single

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Seldén Mast AB
plain bearing block / single / with fixed head / max. rope ø 6 mm
plain bearing block
PPB 16

Working load: 70 kg
Breaking load: 140 kg

Specifications Weight: 6.00 g Safe working load: 70 kg Breaking load: 140 kg Max line size: 6 mm System: PBB16 Block type: single

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Seldén Mast AB
plain bearing block / single / with fixed head / max. rope ø 6 mm
plain bearing block
PPB 16

Working load: 100 kg
Breaking load: 200 kg

Specifications Weight: 10.00 g Safe working load: 100 kg Breaking load: 200 kg Max line size: 6 mm System: PBB16 Block type: single

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Seldén Mast AB
plain bearing block / single / with swivel / max. rope ø 12 mm
plain bearing block
PBB 50

Working load: 700 kg
Breaking load: 1400 kg

Specifications Weight: 113.00 g Safe working load: 700 kg Breaking load: 1400 kg Max line size: 12 mm Pin diam: 5 mm Shackle diam: 5 mm System: PBB50 Block type: single

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Seldén Mast AB
plain bearing block / single / with becket / with swivel
plain bearing block
PBB 50

Working load: 700 kg
Breaking load: 1400 kg

Specifications Weight: 129.00 g Safe working load: 700 kg Breaking load: 1400 kg Max line size: 12 mm Pin diam: 5 mm Shackle diam: 5 mm System: PBB50 Block type: singleBecket

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Seldén Mast AB
ball bearing block / single / with swivel / with shackle
ball bearing block
Racing

Working load: 800 kg
Breaking load: 1600 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 ...

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Lewmar
ball bearing block / single / for racing sailboats / halyard
ball bearing block
Racing

Working load: 1400, 2500 kg

... static loads. Low profile head fits into pad eye for lowest lead to the winch. Alloy sheave profile for H.M P.E. line such as Spectra, Dyneema or Vectran.

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Lewmar
cheek block / single / with swivel snap shackle / for racing sailboats
cheek block
Racing

Working load: 1135 kg
Breaking load: 2270 kg

Ideal for general spinnaker use, the Snatch Block features the Lewmar snap shackle and soft, synthetic rubber cheeks to handle rough treatment. Where a snatch block is attached in a situation which does ...

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Lewmar
mast foot block / ball bearing / single / for racing sailboats
mast foot block
Racing

Working load: 400 kg - 19000 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 ...

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Lewmar
fiddle block / ratchet / cam cleat / single
fiddle block
Racing

Working load: 1000 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 ...

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Lewmar
plain bearing block / single / with swivel / for sailboats
plain bearing block
NEX 2.5 / 5.0

General description The halyard block is an optional accessory to be used with Profurl flying sails furlers. Integrated into the top swivel, it allows to optimize the luff length. The sheave box stands half of the load ...

roller bearing block / single / with swivel / for sailboats
roller bearing block
90105

Working load: 140 kg
Breaking load: 700 kg

... position, grub screw lockable head post swivel Alloy sheaves design to suit modern ropes Applications Cunningham Downhaul Travelers Barber-haulers Linked products Fastening ...

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Wichard
roller bearing block / single / with swivel / with becket
roller bearing block
90106

Working load: 140 kg
Breaking load: 700 kg

... range of blocks Excellent high-speed low load and high-function load characteristics Interchangeable head fastening systems for multiple attachment methods Protection of the sheave by the cheeks for added durability ...

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Wichard
roller bearing block / single / with swivel / max. rope ø 10 mm
roller bearing block
93105

Working load: 320 kg
Breaking load: 900 kg

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

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Wichard
roller bearing block / single / with swivel / with becket
roller bearing block
93106

Working load: 320 kg
Breaking load: 900 kg

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

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Wichard
cheek block / flat / single / with fork
cheek block
93120

Working load: 320 kg
Breaking load: 900 kg

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

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Wichard
fiddle block / single / with swivel / max. rope ø 14 mm
fiddle block
B300621B

Working load: 1150 kg
Breaking load: 2100 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
fiddle block / single / with swivel / max. rope ø 18 mm
fiddle block
B300821B

Working load: 2000 kg
Breaking load: 3600 kg

... plain bearings are used for our assortment, which render the blocks very strong and completely maintenance free. Plain bearings will never deform under high loads like ball bearings and our blocks do ...

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Rutgerson
fiddle block / single / with swivel / with becket
fiddle block
B300322B

Working load: 450 kg
Breaking load: 850 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
fiddle block / single / with swivel / with becket
fiddle block
B300522B

Working load: 700 kg
Breaking load: 1250 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
fiddle block / single / with swivel / with becket
fiddle block
B300622B

Working load: 1150 kg
Breaking load: 2100 kg

... Rutgerson block assortment is unique in its design and functionallity. The entire production chain takes place at our premises in Marstrand. In-house sailing experience together with advanced engineering ensures that ...

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Rutgerson
ball bearing block / single / max. rope ø 16 mm / for sailboats
ball bearing block
801

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
ball bearing block / single / with becket / max. rope ø 16 mm
ball bearing block
802

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
ball bearing block / single / max. rope ø 16 mm / for sailboats
ball bearing block

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
fiddle block / ball bearing / single / with becket
fiddle block
804

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
ball bearing block / single / max. rope ø 16 mm / for sailboats
ball bearing block
805

Working load: 3100 kg
Breaking load: 6200 kg

The 6082 T6 aluminum body, the torlon ball bearing system and the AISI316 CrNi stainless steel parts are designed for very high loads

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Admiral Marine Equipment
ball bearing block / single / with swivel / for sailboats
ball bearing block

single block / with swivel / for sailboats
single block
8369

Working load: 500, 300 kg

ball bearing block / single / with swivel / with becket
ball bearing block
YC40S

Working load: 500 kg
Breaking load: 1000 kg

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UBI MAIOR ITALIA
ball bearing block / single / with swivel / with becket
ball bearing block
YC40SA

Working load: 500 kg
Breaking load: 1000 kg

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UBI MAIOR ITALIA
mast foot block / single / max. rope ø 8 mm / for sailboats
mast foot block
YC40R

Working load: 500 kg
Breaking load: 1000 kg

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UBI MAIOR ITALIA
ball bearing block / single / with swivel / max. rope ø 10 mm
ball bearing block
YC50S

Working load: 750 kg
Breaking load: 1500 kg

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UBI MAIOR ITALIA
ball bearing block / single / with swivel / with becket
ball bearing block
YC50SA

Working load: 750 kg
Breaking load: 1500 kg

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UBI MAIOR ITALIA
swivel block / single / with swivel / for sailboats
swivel block
GS314

Description: Swivel Block With Single Wheel Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

swivel block / single / with swivel / for sailboats
swivel block
GS3141

Description: Swivel Single Sheave Block With Bridge Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

swivel block / single / with swivel / for sailboats
swivel block
GS3141NL

Description: Swivel Single Nylon Sheave Block With Bridge Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

swivel block / single / with swivel / for sailboats
swivel block
GS8252

Description: Swivel Single Nylon Sheave Block With Removable Pin Material: SS304/SS316 Size:25mm/32mm/50mm Surface Treatment:"EP" (Electro Polished)

ball bearing block / single / lashing / max. rope ø 5 mm
ball bearing block
2162

Working load: 125 kg
Breaking load: 450 kg

The 18 mm block features stainless steel ball bearings and an integrated stainless inner race and rivet for optimal strength-to-weight. The 40 mm blocks feature composite sheaves that spin freely on Delrin® ...

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Harken
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 ...

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Harken
roller bearing block / single / with swivel / max. rope ø 6 mm
roller bearing block
HT 92510

Working load: 120 kg
Breaking load: 350 kg

... 20mm Width: 7mm Material: Acetal resin 316 stainless steel straps Axle: 316 stainless steel Line size:2.5 - 6mm USAGE Control Lines Lead Blocks Vang Cascades Cunningham Systems Halyard Leads Rig ...

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Holt
roller bearing block / single / with swivel / with becket
roller bearing block
HT 92511

Working load: 150 kg
Breaking load: 350 kg

... 20mm Width: 7mm Material: Acetal resin 316 stainless steel straps Axle: 316 stainless steel Line size:2.5 - 6mm USAGE Control Lines Lead Blocks Vang Cascades Cunningham Systems Halyard Leads Rig ...

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Holt
plain bearing block / single / lashing / max. rope ø 6 mm
plain bearing block
RF25109

Working load: 250 kg
Breaking load: 550 kg

Features Integrated stainless steel hub to accept lashing attachment and through-sheave becket Suits up to 4mm (5/32”) lashing Includes 750 mm (30") x 1.7mm (1/16") diam lashing

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Ronstan
cam cleat block / single / with swivel / with becket
cam cleat block
RF45130

Working load: 325 kg
Breaking load: 700 kg

Features Ultra Lightweight Low friction 2-stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating

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Ronstan
high-resistance block / single / lashing / max. rope ø 10 mm
high-resistance block
LL1060

Working load: 1000 kg

... CHARACTERISTICS ATTRIBUTE VALUE Ø sheave (D) 60 mm Side bearing Delrin balls Radial bearing composite fibre Weight 95 gr Ø max line 10 mm SWL 1000 kg Material Aluminum Sheave material Plastic

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Antal
plain bearing block / single / with swivel / max. rope ø 10 mm
plain bearing block
00501

Working load: 600 kg

... CHARACTERISTICS ATTRIBUTE VALUE Ø sheave (D) 50 mm Side bearing Delrin balls Radial bearing composite fibre Weight 90 gr Ø max line 10 mm SWL 600 kg Material Aluminum Sheave material Plastic Shackle Mod. 005SS

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Antal
flat block / single / with becket / for sailboats
flat block
WL/2

Compact stanchion lead system Compact furling line guide system Reduces line friction during furling Fairlead model WL/1 straightline guide for intermediate stanchions Sheave model WL/2 ...

cheek block / cam cleat / single / max. rope ø 12 mm
cheek block
BRS/63

This jammer block is for situations where a fixed foot block cant help: peeling spinnakers, or changing a sheet winch Controlled spinnaker handling Attached with webbing strop, positioned on a toe rail ...

cheek block / single / for sailboats / mast
cheek block
T-fittings

Cheeky Tang fittings specifically for use on masts with t-fitting shrouds.

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Colligo Marine
friction block / single / lashing / max. rope ø 12 mm
friction block
CSS41 / CSS42 / CSS43

... of the low friction of UHMWPE lines, like SK-75, SK-78, or Colligo Dux. These blocks can easily be spliced or lashed on. Be sure to use the larger radius for the moving line to minimize friction. They ...

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Colligo Marine
cheek block / vertical / single / max. rope ø 20 mm
cheek block
00 160 / 10 160

Working load: 275 kg
Breaking load: 550 kg

This month, we are launching the brand new Series 0 Cheek Blocks, which are ideal for use on dinghies and dayboats. Featuring both plain bearing and ball bearing options, this new design is perfect for horizontal or vertical ...

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Barton Marine
ball bearing block / single / for classic sailboats / wooden
ball bearing block
50030 / 50045 / 50060 / 50080

... launches its new "Victory" heritage range of classic, high performance wooden blocks. Combining high performance engineering and classic design, a new range of wooden blocks is being launched by Barton ...

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Barton Marine
roller bearing block / single / for sailboats
roller bearing block
92454

Working load: 390 lb
Breaking load: 1700 lb

... 390 LBS BREAKING LOAD 1700 LBS ROPE UP TO 5/16" 28 MM SHEAVE WEIGHT 1.8 OZ. SINGLE FIXED HEAD WITH ALUMINUM SHEAVE- HEAVY LOAD- ITEM 92454 SAILBOAT BLOCK LINE CLASSIC 28 CONVENTIONAL ...

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Nautos-usa llc
ball bearing block / single / with swivel / for sailboats
ball bearing block
92410

Working load: 280 lb
Breaking load: 1650 lb

... OPTIONAL ALUMINUM SHEAVE ON ROLLER BEARINGS FOR HIGHER LOADS. WORKING LOAD 280 LBS BREAKING LOAD 1650 LBS WEIGHT 1.25 OZ. MAX LINE 5/16"

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Nautos-usa llc
plain bearing block / single / with swivel / max. rope ø 10 mm
plain bearing block
MR1001-0115

Working load: 35 kg - 450 kg

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Qingdao K-Wing Industry Co., Ltd
single block / with swivel / max. rope ø 10 mm / max. wire rope ø 10 mm
single block
MR1007-0125

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Qingdao K-Wing Industry Co., Ltd

How to choose this product

single-block

A single block has only one sheave. Models differ in size, sturdiness, attachment and bearing systems.

Applications

Such blocks can be used in two-line block and tackle, as an intermediary pulley in multi-block tackle or as a line lead block.

Technologies

Each of the many different attachment systems is appropriate for a particular type of block. There are two main bearing configurations. In blocks with mechanical or plastic ball bearings, two sets of bearings support the load in races on either side of the sheave.

Roller bearings sit in pairs between the races within the sheave. While sometimes found in small blocks, they are more often used in large-diameter models, as they can support higher loads and wear more slowly.

How to choose

Line diameter and working load will be the main choice criteria. Manufacturers include detailed technical information in their catalogs.