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Series 30 Utility Ball Bearing Block - Single, Swivel Shackle Head
Features:
Low friction 2-stage ball bearing system provides consistent performance over the full working load range.
High static and dynamic load capacity.
Light weight
Versatile head fittings
Product Information:
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Can be fitted with a shackle in either of two planes to allow correct alignment of the block.
Applications:
Primary lead blocks on dinghies and catamarans
Control lines on larger yachts
Materials:
U.V. stabilized Acetal sheaves
Acetal ball bearings
Impact modified, fiber reinforced and U.V. stabilized Nylon cheeks
Grade 316 stainless steel load straps and head fittings
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23.11 |
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Series 30 Utility Ball Bearing Block - Single, Becket, Swivel Shackle Head
Features:
Low friction 2-stage ball bearing system provides consistent performance over the full working load range.
High static and dynamic load capacity.
Light weight
Versatile head fittings
Cheek cut-outs for easy bearing maintenance
Product Information:
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.
Applications:
Primary lead blocks on dinghies and catamarans
Control lines on larger yachts
Materials:
U.V. stabilized Acetal sheaves
Acetal ball bearings
Impact modified, fiber reinforced and U.V. stabilized Nylon cheeks
Grade 316 stainless steel load straps and head fittings
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36.82 |
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Series 30 Utility Ball Bearing Block - Stand-up, Loop Top
Features:
Low friction 2-stage ball bearing system provides consistent performance over the full working load range.
High static and dynamic load capacity.
Light weight
Versatile head fittings
Priduct Information:
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.
Applications:
Primary lead blocks on dinghies and catamarans
Control lines on larger yachts
Materials:
U.V. stabilized Acetal sheaves
Acetal ball bearings
Impact modified, fiber reinforced and U.V. stabilized Nylon cheeks
Grade 316 stainless steel load straps and head fittings
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20.54 |
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Series 15 Ball Bearing Utility Block - Single, Swivel Shackle Head
Features:
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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16.46 |
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Series 45 Core Block™ - Single - Swivel Shackle Head
Core 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 Bearing
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 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 Plates
Block 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.
Features:
High dynamic and static load capacity
Efficient 2-stage bearing system
Ball bearings to counteract side thrust loads
Class leading performance and sleek, contemporary styling
Durable aluminium alloy cheek plates
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 10M (33')
Various control line applications on larger yachts
Alloy sheave models are available for use with wire
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: 45mm(1-3/4")
Max. Rope Ø: 12mm(1/2")
Pin Ø: 5mm(3/16")
M.W.L.: 700kg(1,540lbs)
B. L.: 1,400kg(3,090lbs)
Weight: 104g(3.6oz)
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50.93 |
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Series 30 Utility Block - Single, Swivel Shackle Head
Features:
Lightweight durable construction
Economical
Maintenance free
Product Information:
Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase.
Applications:
Vang, cunningham and trapeze retriever systems on dinghies
Leech line tackles, bunk adjusters etc on larger yachts
Materials:
U.V. stabilized Acetal sheaves
Grade 316 stainless steel cheeks
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21.68 |
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Series 25 Utility Block™ - Single - Swivel Shackle Head
Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase.
Features:
Lightweight durable construction
Economical
Maintenance free
Applications:
Vang, cunningham and trapeze retriever systems on dinghies
Leech line tackles, bunk adjusters, etc on larger boats
Materials:
U.V. stabilized acetal sheaves
Grade 316 Stainless Steel cheeks
Specifications:
Sheave Ø: 25mm(1")
Max. Rope Ø: 6mm(1/4")
Pin Ø: 4mm(5/32")
M.W.L.: 150kg(330lbs)
B. L.: 300kg(660lbs)
Weight: 20g(0.7oz)
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15.42 |
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Series 40 Orbit BB Double Block with Swivel & Shackle
The Series 40 ball-bearing Orbit Blocks™ provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.
As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.
Series 40 Orbit Blocks™ are fitted with our carbon-reinforced C-Cleat™ for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.
Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.
High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave & hub together with a triple bearing race to maintain low friction at very high loads.
Features:
Class-leading dynamic and static load ratings
Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks
Low friction 2-stage ball bearing system for efficient and effortless trimming
Soft attachment, lashing and traditional swivel shackle head options
Low profile and compact
High performance cleating
Applications
Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)
Halyard, vang and backstay applications on boats to 9m (30ft)
Control line applications on larger yachts
Specifications:
Sheave Ø: 1-9/16 in.
Max. Rope Ø: 3/8 in.
Pin Ø: 5/32"
M.W.L.: 1320 lb.
B. L.: 2650 lb.
Weight: 4.2 oz.
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64.00 |
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Series 40 Orbit BB Triple Block with Swivel Shackle
The Series 40 ball-bearing Orbit Blocks™ provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.
As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.
Series 40 Orbit Blocks™ are fitted with our carbon-reinforced C-Cleat™ for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.
Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.
High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave & hub together with a triple bearing race to maintain low friction at very high loads.
Features:
Class-leading dynamic and static load ratings
Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks
Low friction 2-stage ball bearing system for efficient and effortless trimming
Soft attachment, lashing and traditional swivel shackle head options
Low profile and compact
High performance cleating
Applications
Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)
Halyard, vang and backstay applications on boats to 9m (30ft)
Control line applications on larger yachts
Specifications:
Sheave Ø: 1-9/16 in.
Max. Rope Ø: 3/8 in.
Pin Ø: 5/32"
M.W.L.: 1320 lb.
B. L.: 2650 lb.
Weight: 5.9 oz.
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95.60 |
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Series 40 Orbit BB Quad Block with Swivel Shackle
The Series 40 ball-bearing Orbit Blocks™ provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.
As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.
Series 40 Orbit Blocks™ are fitted with our carbon-reinforced C-Cleat™ for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.
Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.
High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave & hub together with a triple bearing race to maintain low friction at very high loads.
Features:
Class-leading dynamic and static load ratings
Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks
Low friction 2-stage ball bearing system for efficient and effortless trimming
Soft attachment, lashing and traditional swivel shackle head options
Low profile and compact
High performance cleating
Applications
Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)
Halyard, vang and backstay applications on boats to 9m (30ft)
Control line applications on larger yachts
Specifications:
Sheave Ø: 1-9/16 in.
Max. Rope Ø: 3/8 in.
Pin Ø: 5/32"
M.W.L.: 1320 lb.
B. L.: 2650 lb.
Weight: 6.8 oz.
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128.40 |
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Series 40 Orbit BB Quin Block with Swivel Shackle
The Series 40 ball-bearing Orbit Blocks™ provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.
As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.
Series 40 Orbit Blocks™ are fitted with our carbon-reinforced C-Cleat™ for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.
Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.
High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave & hub together with a triple bearing race to maintain low friction at very high loads.
Features:
Class-leading dynamic and static load ratings
Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks
Low friction 2-stage ball bearing system for efficient and effortless trimming
Soft attachment, lashing and traditional swivel shackle head options
Low profile and compact
High performance cleating
Applications
Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)
Halyard, vang and backstay applications on boats to 9m (30ft)
Control line applications on larger yachts
Specifications:
Sheave Ø: 1-9/16 in.
Max. Rope Ø: 3/8 in.
Pin Ø: 5/32"
M.W.L.: 1320 lb.
B. L.: 2650 lb.
Weight: 8.5 oz.
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146.27 |
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Series 30 Ball Bearing Block Single Becket Option Lashing
Ball Bearing 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 fibre-reinforced composites in the block head, cleat arms and beckets.
Highest Working Load in its Class
The proven Ronstan 2-stage bearing system (Series 30 and larger) features high compression grade Acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.
The sheave and bearing system is supported by a fibre-reinforced load frame, computer modelled and optimised using advanced stress analysis methods. The Dyneema® Link, used in multi-sheave blocks, is produced from high spec SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
Simple, Versatile & Secure Attachment
The single block is easily lashed to an attachment point, and can also accept Dyneema® Links and shackles for a variety of efficient attachment alternatives. The Dyneema® Link used in multi-sheave blocks is easily fitted and secured by a removable pin. The Dyneema® Link can also be removed and replaced by a shackle, custom lashing or strop.
These blocks are far more compatible with Dyneema®/Spectra® lines, carbon laminate connection points and webbing than traditional blocks with steel loop tops or shackles.
Low Profile & Compact
The two way head in the single lashing block allows for alignment at 0° or 90° orientation, while the single swivel block allows for full articulation.
The flexible Dyneema® Link used in multi-sheave blocks provides 0° or 90° orientation. It connects directly to the head of the block rather than to an intermediate head post. This reduces weight and gives the lowest possible profile while allowing full articulation. Beckets have been carefully designed to minimise height.
Features:
Lightweight
Highest working load in its class
Secure, versatile and secure attachement
Low profile and compact
Ultra low profile thru-sheave becket
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
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82.34 |
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Series 15 Ball Bearing Utility Block - Single, Swivel Hook Head
Features:
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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19.26 |
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Series 40 Ball Bearing Block - Single - Becket
Features:
Low friction Acetal or Torlon® bearing system
Lightweight
Cheek cut-outs for easy bearing maintenance
Captive Lock™ universal head
Slotted pin shackle eliminates fouled lines
Snap fit removable becket pin
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Becket pin is removable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or tools
Applications:
Mainsheet
Halyard
Vang
Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
Materials:
Acetal 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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31.25 |
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Series 40 Ball Bearing Block - Single - Universal Head
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required.
Features:
Low friction Acetal or Torlon® bearing system
Lightweight
Cheek cut-outs for easy bearing maintenance
Captive Lock™ universal head
Slotted pin shackle eliminates fouled lines
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
Acetal ball bearings
Impact and U.V. resistant, fiber reinforced Nylon cheeks
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.: 350kg(770lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 70g(2.5oz)
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23.54 |
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