Sailing - Blocks

Series 20 Ball Bearing Block- Single, Stand-Up Loop TopFeatures: 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 Traveler 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

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90mm Synchro Block - SingleLewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling.  Using a combination of scientifically optimized block geometry, a Free-Spin bearing, and a self-aligning head to reduce friction and increase efficiency by up to 40%, over budget blocks on mainsheet systems. Each component is perfectly synchronized with the movement of the rope, providing you with an easier, smoother transfer of power from deck to sail and less wear on your rope.Features: Stainless steel strap for improved strength and longer service life Stiff glass fiber reinforced cheeks to prevent lines from wedging Innovative design with “tool-free” sliding swivel locking mechanism Technical Specifications: Working Load Limit - 4400lb Weight - 14.57oz Maximum Line Size - .55" (14mm) *Sold as an Individual

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Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel HeadFeatures: Ultra Lightweight Low friction 2-stage Orbital ball bearing system Highest working load in its class Low profile and compact High performance cleating LightweightKilogram 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 minimizes 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 It's ClassThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximizes 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 modeled to be stress optimized.Applications: Mainsheet systems on spinnaker sheet on dinghies to 5m (16ft) Spinnaker sheets on dinghies, sportsboats and small keel boats to 5m (16ft) Halyard, vang and backstay applications on boats to 8m (26ft) Control line applications on larger yachts Materials: Ball Bearings - High compression strength carbon black Acetal. Stage 2 Bearing - Glass fibre reinforced, MoS2 impregnated Nylon Frame/Cheeks - Toughened, glass fibre reinforced Nylon Sheave - Carbon fiber reinforced, PTFE impregnated Nylon

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Series 3 Flat Base/Alum Cheek/Delrin SheaveDelrin™ plain bearing sheave ensures smooth operation and high safe working load. Stainless Steel base distributes loads to a larger surface area.Specifications: Sheave Dia. 1-7/16" (37 mm) Max Line 7/16" (11 m) Length 2-7/8" (73 mm) Width 1-3/4" (44 mm) Height 3/4" (19 mm) Fasteners (4) #10- RH (5 mm) C/C 2-3/8" (60 mm) SWL 1000 lbs. (450 kg) Weight Alum. 2.5 oz. (71 g) 

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Size 3 Stanchion Lead Block - Single with Becket & Cam Cleat Barton 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 significant diameter brass bearing, ensuring free running under the highest loads.   The unit will fully rotate about the swivel head to match your pulling angle. Cam cleat will secure the line into place.  Block attachment to stanchion is by means of screwing together the integral Stainless Steel strap.Technical Specifications Sheave - Single Sheave Size - 1-3/4" (45mm) Maximum Rope Diameter -  3/8" (10mm) Safe Working Load - 881 lb (400 kg) Maximum Stanchion (Tube) Size - 1" (25mm)  *Sold as an Individual  Quick Guide (pdf)Brochure (pdf)

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29mm Carbo T2 BlockThe high-strength composite T2™ is the first block with no metal shackles or rivets. It is used for traveler controls, mainsheets and vangs, cascades, bridles, and other systems where small, lightweight blocks are called. The T2 can be tied, spliced, or lashed to almost anything. The length of the Spectra® line is included. Spectra® is a registered trademark of Honeywell International, Inc.Specifications: Sheave Ø (mm): 29 mm Sheave Ø (in): 1-1/8 in. Length (mm): 43 mm Length (in): 1-11/16 in. Weight (g): 12 g Weight (oz): 0.4 oz Maximum Line Ø (mm): 8 mm Maximum Line Ø (in): 5/16 in. Maximum Working Load (kg): 150 kg Maximum Working Load (lb): 330 lbs. Breaking Load (kg): 454 kg Breaking Load (lb): 1000 lbs. Owner's Manual (pdf)

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Series 25 Ball Bearing Orbit Block™ - LashingSingle sheave ball bearing block with becket and lashing head.The Series 25 Ball Bearing Orbit Blocks™ deliver superior strength, reduced weight, and exceptional performance for high-demand dinghy and small boat applications.Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. Featuring Ronstan’s renowned high-compression strength acetal bearing system, the Series 25 BB Orbit Blocks are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 metres.Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. The hub accommodates up to 4mm (5/32") lashing and ensures maximum efficiency without compromising reliability.Features: 2-stage ball bearing system. Suits up to 8mm (5/16”) lines. Hollow hub for becket take-off. Lashing blocks suit up to 4mm (5/32”) lashing. Specifications: Max. Rope diameter (in): 5/16 Sheave diameter (in): 1 B.L. (lb): 1650 Weight (oz): 0.5 Applications: Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft).  Control lines. Cascading vangs. Leech lines & cunninghams. Materials: BB Sheave and balls: High compression strength acetal. Frame/cheeks: Toughened, glass-fiber-reinforced nylon.

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Clip for 1" StanchionThis stainless steel clip is for a 1 in. stanchion.Specifications:Weight: 0.019kg

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Series 25 Ball Bearing HHL Lashing Orbit Block™Single sheave ball bearing high load block with becket hub option and lashing head.The Series 25 Ball Bearing Orbit Blocks™ deliver superior strength, reduced weight, and exceptional performance for high-demand dinghy and small boat applications.Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. Featuring Ronstan’s renowned high-compression strength acetal bearing system, the Series 25 BB Orbit Blocks are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 metres.Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. The hub accommodates up to 4mm (5/32") lashing and ensures maximum efficiency without compromising reliability.The range also includes a High Load (HHL) variant – the RF28109HL – which is equipped with a Grade 2205 stainless steel sheave and bearing race, paired with Grade 304 stainless steel ball bearings. These HHL blocks are purpose-built for high-load applications and are increasingly in demand for modern performance and foiling boats using small-diameter lines to carry significant loads.Features: 2-stage ball bearing system. Suits up to 8mm (5/16”) lines. Hollow hub for becket take-off. Lashing blocks suit up to 4mm (5/32”) lashing. Specifications: Max. Rope diameter (in): 5/16 M.W.L. (lb): 880 Sheave diameter (in): 1 B.L. (lb): 2650 Weight (oz): 1.2 Applications: Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft).  Control lines. Cascading vangs. Leech lines & cunninghams. Materials: Frame/cheeks: Toughened, glass fibre reinforced nylon.   HHL Sheave and bearing race: Grade 2205 stainless steel with Grade 304 stainless steel ball bearings.

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Series 25 Ball Bearing Orbit Block™ - Becket & Swivel ShackleSingle sheave ball bearing block with becket hub and swivel shackle head. Series 25 Ball Bearing Orbit Blocks™, delivering superior strength, reduced weight, and exceptional performance for high-demand dinghy and small boat applications.Designed with competitive sailors and performance boats in mind, these compact 25mm blocks are engineered to achieve the highest possible strength-to-weight ratio. Featuring Ronstan’s renowned high compression strength acetal bearing system, the Series 25 BB Orbit Blocks™ are a lightweight yet durable solution, ideal for control line systems such as mainsheet and spinnaker sheet turning blocks, cunninghams, and cascading vangs on dinghies up to 4 meters.Each block has a stainless steel hub for versatile lashing attachments and through-sheave becket functionality, making them adaptable to a wide range of rigging setups. The hub accommodates up to 4mm (5/32") lashing and ensures maximum efficiency without compromising reliability.Features: 2-stage ball bearing system. Suits up to 8mm (5/16”) lines. Hollow hub for becket take-off. Lashing blocks suit up to 4mm (5/32”) lashing. Specifications: Max. Rope diameter (in): 5/16 M.W.L. (lb): 500 Sheave diameter (in): 1 B.L. (lb): 990 Weight (oz): 0.6 Applications: Mainsheet and spinnaker sheet turning blocks on dinghies to 4m (13ft). Control lines. Cascading vangs. Leech lines & cunninghams. Materials: Frame/cheeks: Toughened, glass fibre reinforced nylon.   BB Sheave and balls: high compression strength acetal.

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Series 15 Ball Bearing Utility Block - Double, Loop HeadFeatures: 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 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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Single Aluminum Block - 60mm SheaveDelrin™ sheave ensures smooth operation and a high safe working load. Swivel head may be locked in place to eliminate twisting. Specifications: Sheave Diameter 2 3/8" (60mm) Thickness 1 3/32" (28mm) Width 2 1/2" (64mm) Length 5 1/32" (128mm) SWL 2250 lbs. (1020kg) Weight 7.4oz (210g) Max Line size 1/2" (13mm) 

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