Sailing - Blocks

40mm Double Sheave Fishing BlockLow-friction Carbo Air blocks are lightweight, strong, and reliable. These compact blocks have very high working loads and smooth operation to simplify the positioning and retrieval of teaser lines. 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): 220 kg Maximum working load (lb): 485 lbs

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22mm Double Micro BlockLow-friction Micro blocks are compact and lightweight. Specifications: Sheave: 22mm / 7/8in. Length: 51mm / 2in. Weight: 43g / 1.5oz. Maximum line: 6mm / 1/4in. Maximum working load: 159kg / 350lb Breaking load: 544kg/ 1200 lb

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Series 20 Ball Bearing Block - Double - 2-Axis Shackle HeadFeatures: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Two-Way head can be fixed at 0° or 90° Applications: Dinghy control lines Dinghy vangs Cunninghams Traveller controls Materials: Stainless steel ball bearings UV Stabilized Acetal sheave Grade 316 stainless steel load strap and head fitting Impact and UV resistant, fiber reinforced Nylon cheeks Specifications:Sheave Ø:t20mm(3/4")Max. Rope Ø:t6mm(1/4")PinØ: 4mm(5/32")M.W.L.:t350kg(770lbs)B. L.:t700kg(1,540lbs)Weight:t42g(1.5oz)

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Series 40 All Purpose Block - Double Block - Full Swivel HeadAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Head swivels freely.Features: Exceptionally high working loads Low maintenance, long service life Self-lubricating sheave Slotted pin shackle eliminates fouled lines Two way head post Applications: Mainsheet Halyard Vang Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26') Materials: U.V. stabilized Acetal sheaves Impact and U.V. resistant, fiber reinforced Nylon cheeks Grade 316 stainless steel bearing race Grade 316 stainless steel load strap and head fitting Specifications: Sheave Ø: 40mm(1-9/16") Max. Rope Ø: 10mm(7/16") Pin Ø: 5mm(3/16") M.W.L.: 600kg(1,320lbs) B. L.: 1,200kg(2,650lbs) Weight: 135g(4.8oz)

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Series 40 Ratchet Orbit Block™ - Single - Auto - Swivel Shackle HeadAutomatic RatchetWith automatic models, 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.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. The Series 40 delivers up to 14:1 holding power, almost double that of our nearest competititor.The unique sheave design has 8 gripping faces which directly resist loaded line movement. Traditional designs have 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.Simple and Secure AttachmentThe Dyneema® Link is easily fitted and is retained securely by a moulded retainer clip. The flexible link can be left with one end attached to the block when fitting - no more lost shackle pins.The system is compatible with Dyneema®/Spectra® strops, webbing and carbon connection points - much more so than steel loop tops or shackles.Smooth Easing of SheetsWith auto models the sheet runs out smoothly and freely as soon as the ratchet mechanism disengages. Low Profile Stand-Up Kit Allows 0™ or 90™ AlignmentStand-up kits feature a clatter-free rubber boot. You can attach the Dyneema® link so that the block is aligned with the stand-up base or across it. It's a neat low-profile solution which allows full articulation.Features: Up to 14:1 holding power - highest available! Smooth easing of sheets Fully Automatic load sensing ratchet engagemen Swivel shackle head for unlmited block rotation Stainless steel shackle head for ultimate durability and compatibility with harsh fixing points Applications: Dinghy mainsheet systems Mainsheet fine tune systems on sportsboats & small keel boats Mainsheet systems on sportsboats using RF7 mainsheet swivel cleat unit Spinnaker and job sheets on dinghies - especially modern asymmetric classes Control line applications on larger yachts Materials: Sheave: Hard anodised Aluminium Ball Bearings: High compression strength carbon black Acetal Frame/Cheeks: Toughened, glass fiber reinforced Nylon Rope Link: UV stabilized, multi-strand impregnated SK75 Dyneema® Specifications:Sheave Ø:t40mm(1-9/16")Max. Rope Ø: 9mm(5/16")M.W.L.:t175kg(385lbs)B. L.:t500kg(1,100lbs)Weight:t44g(1.5oz)

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Series 20 Ball Bearing Block - SingleFeatures: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Applications: Dinghy control lines Dinghy Vangs Cunninghams Traveller controls Materials: U.V. Stabilized Acetal sheaves Stainless steel ball bearings Grade 316 stainless steel load strap and head fitting Impact and UV resistant, fiber reinforced Nylon cheeks Specifications:Sheave Ø:t20mm(3/4")Max. Rope Ø:t6mm(1/4")Pin Ø: 3mm(1/8")M.W.L.:t250kg(550lbs)B. L.:t550kg(1,210lbs)Weight:t20g(0.7oz)

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Series 20 Ball Bearing Orbit Block - Single - Dyneema Lashing - Becket OptionThe incredible Series 20 Orbit Block™ is capable of loads up to 250kg (550lb) while weighing a mere 9 grams. It's so light that it needs to be lashed down!Features: Integrated stainless steel hub to accept lashing attachment and through-sheave becket Suits up to 4mm(5/32") lashing Includes 750mm (30") x 1.7mm(1/16") diam lashing Applications:Control lines on dinghies and catamarans to 5M(16')Materials: Sheave: High compression strength carbon acetal Ball bearings: stainless steel Frame/Cheeks: Nylon Brochure (pdf)

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Series 75 Core Block™ - SingleCore Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Universal BearingDynamic and high static load performanceThe Ronstan Universal Bearing incorporates our proven 2-stage bearing systemStage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn't perfect. Particularly important for cheek blocks.Alloy Cheek PlatesBlock cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear.Universal headThe head assembly incorporates a brass bearing washer to provide smooth 360™ rotation of the post and shackle. A set screw arrangement allows the head to be locked at 0™ or 90™.Shackles are high quality forged grade 316 stainless steel.Features: Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less than half the friction of the nearest competitor Universal head with full 3-axis articulation Head posts can be locked at 0 or 90 degrees, by using a 2.5mm Hex/Allen Key Central hub hole can be used as a becket take-off or tie-up point Applications: Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 14M (46') Various control line applications on larger yachts Materials: Sheave: U.V. stabilized Acetal Cheek body: Aluminium Alloy Ball Bearings: High compression strength carbon black Acetal Shackle, head post & hub: Grade 316 stainless steel Specifications:Sheave Ø:t75mm(3")Max. Rope Ø:t14mm(9/16")Pin Ø:t8mm(5/16")M.W.L.:t1,500kg(3,300lbs)B. L.:t3,000kg(6,600lbs)Weight:t354g(12.5oz)

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40mm Carbo Air Cheek 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)220 kg Maximum working load (lb)485 lb

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Series 7 Flat Base/Aluminum Cheek/Delrin SheaveDelrin™ sheave ensures smooth operation and high safe working load. Stainless steel base distributes loads to a large surface area. Specifications: Sheave Dia. 2-3/8" (60 mm) Max. Line 1/2" (13 mm) Length 4-3/8" (111 mm) Width  2-3/4" (70 mm) Height 1" (25 mm) Fasteners (4) 1/4" RH (6 mm) C/C 3-5/8" (92 mm) C/C (wide end) 2" (51mm) C/C (narrow end) 1-9/16" SWL 2250 lbs. (1020 kg) Weight Alum. 9.6 oz. (272 g) 

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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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Size 2 Single Swivel BlockA strong, lightweight range of blocks for use on dinghies and dayboats or as lead blocks on larger craft. Size 2 - Single Swivel Block.

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