Size 2 Single Upright BlockPlain Bearing BlocksBarton plain bearing blocks have a precision molded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads.Specifications Sheave size: 35mm x 12mm Max rope diameter: 8mm Safe working load: 370kg / 815lbs Breaking load: 740kg / 1630lbs Length: 80mm Weight: 73g

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8mm Snap Close Shackle - 5 Pack Simply push the shackle together, but once it's snapped shut, it won't come undone again.Specifications: Material: Nylon Package Size: 5 included 

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60mm Triple Aluminum Element Block with SwivelElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Features: Sheave Ø (mm): 60 mm Sheave Ø (in): 2-3/8 in Maximum line Ø (mm): 14 mm Maximum line Ø (in): 9/16 in Maximum working load (kg): 1650 kg Maximum working load (lb): 3638 lb

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60mm Triple Aluminum Element Block with Swivel & BecketElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Features: Sheave Ø (mm): 60 mm Sheave Ø (in): 2-3/8 in Maximum line Ø (mm): 14 mm Maximum line Ø (in): 9/16 in Maximum working load (kg): 1650 kg Maximum working load (lb): 3638 lb

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Spring Loaded/Lined Slide/Stainless Steel for 1-1/4" T-TrackDelrin™ sheave ensures smooth operation and high safe working load. Stainless Steel cheeks and stainless steel slider ensure reliability. Polyethylene liner and pin stop allow for easy adjustment. Specifications: Track Size 1-1/4" x 3/16" (32 mm x 5 mm) Max. Boat Length 33' (10 m) Max. Boat Weight 12000 lbs. (5455 kg) Max. Sail Area 520 sq. ft. (48 m2) Sheave Diameter 2-3/8" (60 mm) Max Line 1/2" (12 mm) Length 4" (102 mm) Width 1-9/16" (39 mm) Height 4-15/16" (126 mm) Bearing Height 2-3/8" (67 mm) SWL 2250 lbs. (1020 kg) Weight 14 oz. (397 g) 

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Series 55 Ball Bearing Orbit Block™ - Single - Becket - Swivel HeadLightweightKilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible.Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block. Highest Working Load In Its ClassThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range. The floating sheave and bearing system is supported by a fiber-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fiber, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.Features: Ultra Lightweight Low friction 2-stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating Swivel shackle head for unlimited block rotation Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points Ultra low profile integrated becket Applications: Mainsheet systems on dinghies, sportsboats and small keelboats to 9M(30') Spinnaker sheets on dinghies, sportsboats and small keel boats to 9M(30') Halyard, Vang and Backstay application on boats to 8M(26') Control line applications on larger yachts Ideal use for mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel boats to 9M(30') Also ideal with halyard, vang and backstay applications on boats to 8M(26') Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks) Control line applications on larger yachts Materials: Ball bearings - High compression strength carbon black Acetal Stage 2 bearing - Carbon fiber reinforced, PTFE impregnated Nylon Frame/Cheeks - Toughened, glass fiber reinforced Nylon Rope Link: UV stabilized, multi-strand impregmented SK75 Dyneema® Sheave: Carbon fiber reinforced, PTFE impregnated Nylon Head fitting: Grade 316 stainless steel. Specifications:Sheave Ø: 55mm(2-5/32")Max. Rope Ø: 10mm(3/8")M.W.L.: 500kg(1,100lbs)B. L.: 1,000kg(2,200lbs)Weight: 88g(3.1oz)

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Tufnol Snatch Block for Wire & Fibreoptic CablesThe Barton wire snatch block has been developed specifically as a low maintenance static free block. The Tufnol sheave means that static cannot build up in the block and cause electrical discharge. Tufnol is a bearing-grade material so it gives a low-friction surface for the wire to run on and minimizes the number of moving components, giving it reliability and durability. The cheeks are made from marine grade 316 stainless steel as is the pin and retaining nuts. This block is ideal for commercial applications in the toughest of environments.Specifications: Safe Working Load: 350kg (770lbs) Break Load: 1500kg (3300lbs) Max Rope/Wire size: 10mm (3/8”) Weight: 78grms (2.8oz) Length: 190nn (7 ½”) Width: 115mm (4 ½”) Thickness (Maximum): 53mm (2 1/16”) Fibreoptic & Wire BendingFibreoptic cables and wire ropes require a minimum bend radius to stop failures. This block is suitable for both fibreoptics and wires up to 10mm in diameter. The large sheave means that the bend radius of the wire is not compromised and provides an additional engineered safety factor to prologue the life of wire if continual movement around the same section of wire is required. Brochure (pdf)

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Stanchion Ratchet BlockControlling the Power in Furling lines! This Stanchion Ratchet Block is ideal for removing some of the loadings for the crew when furling in the jib. The ratchet means that the sheave can be locked in place in one direction offering a friction brake against the pull of the sail. It is quick and simple to fit onto a standard 25mm (1”) guard rail stanchion. Adjustment is easy with the stainless steel clamping ring which allows mounting of the block at any angle.The Barton ball-bearing Ratchet Block is designed to be used online up to 10mm (3/8”). The block is a high-performance 55mm (2 3/16”) ratchet block and features a stainless-steel lever that locks the swivel head if desired.Designed with ball bearings for low friction and longevity in harsh marine environments, the Ratchet Block body is manufactured from a composite of high-density nylon and glass fiber reinforced polymer with a high level of UV protection. Internal components are of marine grade 316 stainless steel and the 12-faced aluminum sheave is anodized in gunmetal silver.Specifications: Length: 120mm/4-3/4" Maximum Line: 10mm/3/8" Width: 55mm/2-3/16" Tube Size: 25mm/1" Brochure (pdf)

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Size 2 Double Stanchion Lead BlockBarton Marine's stanchion lead blocks have proven to be popular with Cruising sailors all over the World. Mounted onto the stanchion base, the stanchion lead block enables the Genoa furling line to be led back to the cockpit for easy adjustment. Ball bearing sheaves have a precision molded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads.   The unit will fully rotate about the swivel head to match your pulling angle. Block attachment to stanchion is by means of screwing together the integral Stainless Steel strap.Technical Specifications Sheave - Double Sheave Size - 1-3/8" (35mm) Maximum Rope Diameter -  5/16" (8mm) Safe Working Load - 815 lb (370 kg) Maximum Stanchion (Tube) Size - 1" (25mm)  *Sold as an Individual Quick Guide (pdf)Brochure (pdf)

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Series 30 Ball Bearing Orbit Block™ - Single - Becket - Lashing HeadBall Bearing Orbit Blocks™ boast the highest strength-to-weight ratio available. This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fiber-reinforced composites in the block head, cleat arms and beckets.Features: Lightweight Highest working load in its class Secure, versatile and secure attachement Low profile and compact Ultra low profile thru-sheave becket RF35101 accepts RF1850S shackle in both orientations to create a conventional loop top block Self-lubricating Nylatron® sheave and full contact bearing for high dynamic loads Applications: Mainsheet systems and spinnaker sheets on dinghies to 5M(16') Halyard, vang and backstay applications on boats to 5M(16') Control line applications on larger yachts Materials: Sheave: High compression strength carbon black Acetal Ball Bearings: High compression strength Acetal Frame/Cheeks: Toughened, glass fiber reinforced Nylon Link: UV stabilized, multi-strand impregnated SK75 Dyneema® Specifications:=Sheave Ø: 30mm(1-3/16")Max. Rope Ø: 8mm(5/16")M.W.L.: 300kg(660lbs)B. L.: 600kg(1,320lbs)Weight: 22g(0.8oz) Quick Guide (pdf)

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40mm Carbo Air Triple Swivel BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Specifications: Sheave Ø (mm)40 mm Sheave Ø (in)1 9/16 in Maximum line Ø (mm)10 mm Maximum line Ø (in)3/8 in Maximum working load (kg)660 kg Maximum working load (lb)1455 lb Quick Guide (pdf)

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22mm Triple Micro BlockLow-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes.Specifications: Sheave: 22mm / 7/8in. Length: 51mm / 2in. Weight: 57g / 2oz. Maximum line: 6mm / 1/4in. Maximum working load: 227kg / 550lb Breaking load: 544kg/ 1200 lb

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Series 15 Ball Bearing Utility Block - Exit BlockFeatures: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high performance & low friction Single loop head blocks include an O-ring to separate running line from head lashing or fixing Features a flush rivet to minimize cutout and facilitate installation. Featuring a formed single piece housing for maximum strength and minimal rope wear.Applications: Dinghy control lines Vangs, cunninghams and tweakers Shock cord tensioning systems Materials: BB sheaves: UV stabilized acetal Ball bearings: Stainless steel Cheeks: Grade 316 stainless steel

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Soft Snatch Block - 12mm Rope SizeAvailable in 4 models, the collection of soft snatch blocks will quickly become an essential piece of kit: flying sail furling, Furler terminals, rigging deviation, and barber-haulers.Made from anodized aluminum, these are both lightweight and robust. The Dyneema loop ensures easy installation. They are easy to open and close too, thanks to the Velcro strip.Applications: Terminals for flying sail furlers 2/1 mainsail halyard Rigging deviation Barber-hauler Specifications: Materials -Anodized aluminum - Dyneema loop  Rope size -12mm Loop diameter - 6mm Working load (lb) 6610 Breaking load (lb) 13220 Weight (lb) 0.311 Dimensions: A (inch) 15/32" B (inch) 2 33/64" C (inch) 1 13/16" D diameter (inch) 15/64"

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40mm Carbo Single Ratchet Block with SwivelCarbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. 2608, 2609, and 2614 have on/off switches. Features: Sheave Ø (mm): 40 mm Sheave Ø (in): 1-9/16 in Maximum line Ø (mm): 10 mm Maximum line Ø (in): 3/8 in Maximum working load (kg): 136 kg Maximum working load (lb): 300 lb

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60mm Single Aluminum Element Block with Swivel & BecketElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Features: Sheave Ø (mm): 60 mm Sheave Ø (in): 2-3/8 in Maximum line Ø (mm): 14 mm Maximum line Ø (in): 9/16 in Maximum working load (kg): 1100 kg Maximum working load (lb): 2425 lb

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29mm Double Carbo Air BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.Specifications: Sheave: 29mm / 1-1/8in. Length: 54mm / 2-1/8in. Weight: 34g / 1.2oz Maximum line: 8mm / 5/16in Maximum working load: 299kg/ 660lb Breaking load: 737kg / 1625lb

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Size 5 54mm Plain Bearing Pulley Block Single Block SwivelThe Size 5 Barton range of blocks has a 54mm 2 1/8" sheave. They are rugged construction, featuring high-grade molded side plates that are through-bolted and riveted for added strength and security. All load-carrying components and interior frame are from marine grade 316 stainless steel and both plain and ball bearing sheaves are available. This sleek and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball-bearing mainsheet traveler system.The 54mm sheave Size 4 range is of rugged construction, featuring high-grade molded side plates that are through-bolted and riveted for added strength and security. All load-carrying components and interior frame are from marine grade 316 stainless steel and both plain and ball bearing sheaves are available. This sleek and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball bearing mainsheet traveller system.Suitable for up to 12mm 7/16" rope. Quick Guide (pdf)

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Size 6 64mm Plain Bearing Pulley Single Block Fixed EyeThe Size 6 Barton blocks are designed as our high-load cruiser block range and are of rugged construction. It features high-grade injection molded side plates, with all load-carrying components from 316-grade stainless steel. Side plates are through-bolted and riveted for added strength and security. This good-looking and versatile range is designed for use on larger cruising and racing yachts. All are designed for ease of use with our ball-bearing mainsheet traveler system.The 64mm sheave Size 6 high load cruiser block range is of rugged construction, featuring high-grade injection molded side plates, with all load-carrying components from 316-grade stainless steel. Side plates are through-bolted and riveted for added strength and security. This good looking and versatile range is designed for use on larger cruising and racing yachts. All are designed for ease of use with our ball bearing mainsheet traveller system.Designed around a 64mm (2 1/2") sheave and to work with 14mm (9/16") ropes.

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Size 5 54mm Plain Bearing Pulley Block Reverse ShackleThe Size 5 Barton range of blocks has a 54mm 2 1/8" sheave. They are rugged construction, featuring high-grade molded side plates that are through-bolted and riveted for added strength and security. All load-carrying components and interior frame are from marine grade 316 stainless steel and both plain and ball bearing sheaves are available. This sleek and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball-bearing mainsheet traveler system.The 54mm sheave Size 4 range is of rugged construction, featuring high-grade molded side plates that are through-bolted and riveted for added strength and security. All load-carrying components and interior frame are from marine grade 316 stainless steel and both plain and ball bearing sheaves are available. This sleek and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball bearing mainsheet traveller system.Suitable for up to 12mm 7/16" rope. Quick Guide (pdf)

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Size 5 54mm Plain Bearing Pulley Block Single Block Fixed EyeThe Size 5 Barton range of blocks has a 54mm 2 1/8" sheave. They are a rugged construction, featuring high-grade molded side plates that are through-bolted and riveted for added strength and security. All load-carrying components and interior frame are from marine grade 316 stainless steel and both plain and ball bearing sheaves are available. This sleek and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball-bearing mainsheet traveler system.The 54mm sheave Size 4 range is of rugged construction, featuring high-grade molded side plates that are through-bolted and riveted for added strength and security. All load-carrying components and interior frame are from marine grade 316 stainless steel and both plain and ball bearing sheaves are available. This sleek and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball bearing mainsheet traveller system.Suitable for up to 1 to 2mm 7/16" rope. Quick Guide (pdf)

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Size 7 70mm Plain Bearing Pulley Block Single SwivelThe size 7 Barton high-load cruising block range is engineered for superior strength and performance and offers both plain and ball-bearing sheave assemblies. The range features high-grade glass fiber nylon reinforced molded side plates with an internal 316 stainless steel frame that is through-bolted and riveted for added strength and durability. This well-designed and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball-bearing mainsheet traveler system.The 70mm sheave Size 7 high load cruising block range is engineered for superior strength and performance and offers both plain and ball-bearing sheave assemblies. The range features high-grade glass fiber nylon reinforced molded side plates with an internal 316 stainless steel frame that is through-bolted and riveted for added strength and durability. This well designed and versatile range is engineered for use on larger cruising and racing yachts and is compatible with our ball bearing mainsheet traveller system.Built with 70mm (2 13/16") sheaves and designed for a maximum rope size of 14mm – 9/16" rope.

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Spring Loaded/Lined Slide/Aluminum for 1" T-TrackDelrin™ sheave ensures smooth operation and high safe working load. Anodized aluminum cheeks and stainless steel slider ensure reliability. Polyethylene liner and pin stop allow for easy adjustment. Specifications: Track Size 1" x 1/8" (25 mm x 3 mm) Max. Boat Length- 27' (8m) Max. Boat Weight- 5000 lbs. (2270 kgs) Sail Area- 315 sq. ft (29 m2) Sheave Diameter 2" (51 mm) Max Line 7/16" (11 mm) Length 3" (76 mm) Width 1-1/4" (31 mm) Height 4-5/32" (105 mm) Bearing Height 2-7/32" (56 mm) SWL 1750 lbs. (795 kg) Weight 7.0 oz. (198 g)

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Series 55 Ratchet Orbit Block™ - Single - Swivel Head - Auto & ManualAutomatic Ratchet BlockNow you can enjoy the flexibility of setting up your ratchet blocks to suit yourself. Ronstan is the only company that offers a ratchet block with both auto and manual engagement modes. In the auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. In manual mode, the ratchet mechanism can be switched on or off as required. This is the preferred mainsheet set-up for may top sailors. Try the block in both modes and see which you prefer - you really can't go wrong. Awesome Ratchet Block Holding PowerQuite simply, Ronstan Ratchet Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. Traditional designes have only 8 faces with an angled resistance to line movement. Our Generation 2 design has straight resistance faces which both distribute the load and minimise rope wear. These faces are offset from the radial line, to draw the rope down into the gripping area when under load. Features: Up to 20:1 holding power Smooth easing of sheets High performance cleating Swivel shackle head for unlimited block rotation. Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points. Automatic & manual ratchet block Applications: Mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel boats to 8M(26') Halyard, vang and backstay applications on boats to 8M(26') Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks) Materials: Sheave: Hard anodised Aluminium Ball Bearings: High compression strength carbon black Aceetal Frame/Cheeks: Toughened, glass fiber reinforced Nylon Rope Link: UV stabilized, multi-strand impregnated SK75 Dyneema® Head fitting: grade 316 stainless steel Specifications:Sheave Ø: 55mm(2")Max. Rope Ø: 10mm(1/2")M.W.L.: 250kg(550lbs)B. L.: 650kg(1,430lbs)Weight: 82g(2.9oz)

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Size 3 45mm Plain Bearing Pulley Block Double with SwivelThe size 3 Barton plain bearing blocks have a 45mm (1 3/4" sheave size 3 block range that incorporates modern design with stainless steel frames and the latest advanced materials, using 30% fiberglass filled nylon and Acetal sheaves to maximize their strength while keeping weight to a minimum. Suitable for use as mainsheet, vangs, lead blocks, or wherever a powerful and compact purchase system is required on dinghies, dayboats, and lightweight cruisers.Suitable for up to 10mm (3/8") rope. Quick Guide (pdf)

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Size 0 20mm Plain Bearing Pulley Block Double Fixed EyeThe Barton Size 0 Plain bearing block has 20mm (3/4″) sheaves and is also available in ball bearing sheaves. They are designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).Suitable for up to 6mm (1/4″) rope Ideal for use on dinghies, day boats smaller craft or lead blocks, flag pennants, etc. on larger yachts. Quick Guide (pdf)

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Size 0 20mm Plain Bearing Pulley Block Single SwivelThe Barton Size 0 Plain bearing block has 20mm (3/4″) sheaves and is also available in ball bearing sheaves. Designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).Suitable for up to 6mm (1/4″) rope Ideal for use on dinghies, day boats, and smaller craft or lead blocks, flag pennants, etc. on larger yachts. Quick Guide (pdf)

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Size 0 20mm Plain Bearing Pulley Block Stand Up BlockThe Barton Size 0 Plain bearing block has 20mm (3/4″) sheaves and is also available in ball bearing sheaves. They are designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).Suitable for up to 6mm (1/4″) rope Ideal for use on dinghies, day boats, and smaller craft or lead blocks, flag pennants, etc. on larger yachts. Quick Guide (pdf)

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Size 0 20mm Plain Bearing Pulley Block Single Fixed Eye & BecketThe Barton Size 0 Plain bearing block has 20mm (3/4″) sheaves and is also available in ball bearing sheaves. Designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).Suitable for up to 6mm (1/4″) rope Ideal for use on dinghies, day boats, and smaller craft or lead blocks, flag pennants, etc. on larger yachts. Quick Guide (pdf)

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Size 0 20mm Plain Bearing Pulley Block Single Swivel without ShackleThe Barton Size 0 Plain bearing block has 20mm (3/4″) sheaves and is also available in ball bearing sheaves. They are designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).Suitable for up to 6mm (1/4″) rope Ideal for use on dinghies, day boats smaller craft or lead blocks, flag pennants, etc. on larger yachts. Quick Guide (pdf)

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Size 3 45mm Plain Bearing Pulley Block Single With Fixed EyeThe size 3 Barton plain bearing blocks have a 45mm (1 3/4" sheave size 3 block range that incorporates modern design with stainless steel frames and the latest advanced materials, using 30% fiberglass filled nylon and Acetal sheaves to maximize their strength whilst keeping weight to a minimum. Suitable for use as mainsheet, vangs, lead blocks, or wherever a powerful and compact purchase system is required on dinghies, dayboats, and lightweight cruisers.Suitable for up to 10mm (3/8") rope. Quick Guide (pdf)

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Size 0 20mm Plain Bearing Pulley Block Single Swivel & BecketThe Barton Size 0 Plain bearing block has 20mm (3/4″) sheaves and is also available in ball bearing sheaves. They are designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).Suitable for up to 6mm (1/4″) rope Ideal for use on dinghies, day boats smaller craft or lead blocks, flag pennants, etc. on larger yachts. Quick Guide (pdf)

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Size 1 Single Swivel Block with BecketWith the unique super-low friction ball race systems, featuring acetal sheaves and delrin ball bearings, running on a large diameter center boss. This allows us to fit more load-bearing balls, which ensure extremely low friction performance, even under high loads.Specifications: Sheave size: 20mm x 8mm Max rope diameter: 5mm Safe working load: 275kg / 606lbs Breaking load: 550kg / 1210lbs Length: 39.1mm Weight: 13g

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Size 3 Single Plain Bearing Block with SwivelBarton plain bearing blocks have a precision molded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads.Features: Fully swiveling head with removable shackle For use on dinghies, day boats, and light cruising yachts Specifications & Dimensions: Length: (mm) 100 / (inch) 3-15/16" Weight (grams): 73 g. Single (mm) 45 x 13 / (inch) 1-3/4" x 1/2" Max Rope Diameter: (mm) 10 / (inch) 3/8" SWL: (kg) 400 / (lbs.) 881 Break Load: (kg) 800 / (lbs.) 1763 Note: break loads where break and safe working loads are stated, it is assumed that all sheaves are evenly loaded as in a purchase tackle

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40mm Twing BlockLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.Features: Opening side plate - Easy to rig and remove from sheet Spring biased to open when unlatched - One-handed operation Roller at pivot base - Use 1:1 or 2:1 up-down control Carbo Air® block construction - High strength for durability and lightweight for maximum float in light air Uses: Dinghies, sport boats, and small keelboats Spinnaker sheet and guy control Code zero sheet up-down control Specifications: Sheave Ø (mm): 40 mm Sheave Ø (in): 1-9/16 in Length (mm): 89 mm Length (in): 3-1/2 in Weight (g): 86 g Weight (oz): 3 oz Maximum line Ø (mm): 12 mm Maximum line Ø (in): 3/8 in Maximum working load (kg): 275 kg Maximum working load (lb): 606 lb Breaking load (kg): 825 kg Breaking load (lb): 1818 lb Owner's Manual (pdf)

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57mm Carbo Quad Block - SwivelLow-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.Features: Sheave Ø (mm) 57 mm Sheave Ø (in) 2 1/4 in Maximum line Ø (mm) 10 mm Maximum line Ø (in) 3/8 in Maximum working load (kg) 1080 kg Maximum working load (lb) 2380 lb

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80mm Element Stand Up BlockStand-up blocks are an addition to our Element line. Use them for sheeting and halyard systems, running backstays, controls and other applications where you don’t want the block to hit the deck.Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave: 80mm (3-1/8") Max Line: 16mm (5/8") Max Working Load: 2200kg (4850lbs)

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Midrange Double BlockMidrange blocks’ robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast trim and release under any load.Features:  Sheave: 76mm/3" Maximum Line: 14mm/9/16" Max Working Load: 1270kg/2800lbs

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60mm Element Stand Up BlockStand-up blocks are an addition to our Element line. Use them for sheeting and halyard systems, running backstays, controls and other applications where you don’t want the block to hit the deck.Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. Specifications: Sheave: 60mm (2-3/8") Max Line: 14mm (9/16") Max Working Load: 1100kg (2425lbs)

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45mm Double Element Block with SwivelElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Specifications: Sheave: 45mm / 1-3/4in Length: 108mm / 4-1/4in Weight: 180g / 6.3oz Shackle pin: 6mm / 1/4in Maximum line: 12mm / 1/2in Maximum working load: 875kg / 1929lb Breaking load: 1750kg / 3858lb

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45mm Double Element Block with Swivel & BecketElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Specifications: Sheave: 45mm / 1-3/4in Length: 127mm / 5in Weight: 195g / 6.8oz Shackle pin: 6mm / 1/4in Maximum line: 12mm / 1/2in Maximum working load: 875kg / 1929lb Breaking load: 1750kg / 3858lb

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45mm Triple Element Block with Swivel & BecketElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Specifications: Sheave: 45mm / 1-3/4in Length: 127mm / 5in Weight: 275g / 9.6oz Shackle pin: 6mm / 1/4in Maximum line: 12mm / 1/2in Maximum working load: 1050kg / 2315lb Breaking load: 2100kg / 4630lb

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45mm Triple Element Block with SwivelElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.Sideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.Specifications: Sheave: 45mm / 1-3/4in Length: 108mm / 4-1/4in Weight: 265g / 9.3oz Shackle pin: 6mm / 1/4in Maximum line: 12mm / 1/2in Maximum working load: 1050kg / 2315lb Breaking load: 2100kg / 4630lb

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57mm Triple Carbo Block - Swivel, Becket, Cam CleatCarbo Ratchets allow sailors to hand-hold loaded lines and offer a balance between holding power and controlled easing.Features: Sheave Ø (mm) 57 mm Sheave Ø (in) 2 1/4 in Maximum line Ø (mm) 10 mm Maximum line Ø (in) 3/8 in Maximum working load (kg) 816 kg Maximum working load (lb) 1800 lb

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Midrange Single with Aluminum Sheave BlockMidrange blocks’ robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast trim and release under any load.Features:  Sheave: 76mm/3" Maximum Line: 14mm/9/16" Max Working Load: 1270kg/2800lbs

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38mm Double Big Bullet Block with BecketLow-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. Features: Sheave: 38mm (1-1/2") Maximum Line: 10mm (3/8") Maximum Working Load: 272kg (600lb)

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29mm Double Bullet Block with BecketLow-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. Features: Sheave: 29mm (1-1/8") Maximum Line: 8mm (5/16") Maximum Working Load: 181kg (400lb)

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38mm Single Big Bullet BlockLow-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. Features: Sheave: 38mm (1-1/2") Maximum Line: 10mm (3/8") Maximum Working Load: 136kg (300lb)

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