Shop by Brand: Ronstan

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

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

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

Series 30 Utility Block- Double, Loop Top

Features:

• Lightweight durable construction
• Economical
• Maintenance free

Product Information:

Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance.

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

Series 30 Utility Block- Double, Tube Rivet

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 accept fixing screws, shackles or can be used as 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

Series 30 Utility Block - Single, Becket, Ferrule Eye 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

Series 30 Utility Block - Single, Becket, Loop 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

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

Series 40 All Purpose Block - Double Block - Full Swivel Head

All 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)

Series 40 All Purpose Block - Fiddle - Becket

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating sheave
• Captive Lock™ universal head
• Slotted pin shackle eliminates fouled lines
• Snap fit removable becket pin
• Spare parts - RF41010 Replacement Becket Pin, RF150 Shackle

All 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.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)
• Ideal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.

Materials:

• U.V. stabilised Acetal sheaves
• Impact and U.V. resistant, fibre reinforced Nylon cheeks
• Grade 316 stainless steel bearing race
• Grade 316 stainless steel load strap and head fitting
• Impact and UV resistant, fiber reinforced Nylon cheeks

Series 40 All Purpose Block - Fiddle - Cleat

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating sheave
• Captive Lock™ universal head
• Slotted pin shackle eliminates fouled lines
• Multi-position cleat arm

All 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.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position.

Applications:

• Mainsheet
• Halyard
• Vang
• Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
• Ideal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.

Materials:

• U.V. stabilised Acetal sheaves
• Impact and U.V. resistant, fibre reinforced Nylon cheeks
• Grade 316 stainless steel bearing race
• Grade 316 stainless steel load strap and head fitting
• Impact and UV resistant, fiber reinforced Nylon cheeks

Series 40 All Purpose Block - Single - Stand Up

All 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. Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required.

Features:

• Exceptionally high working loads
  
• Low maintenance, long service life
  
• Self-lubricating sheave
  
• Captive Lock™ universal head
  
• Mount with 2 x 5mm (3/16") fasteners (not supplied)

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")
M.W.L.: 400kg(880lbs)
B. L.: 800kg(1,760lbs)
Weight: 72g(2.5oz)

Series 40 All Purpose Block - Single - Universal Head

All 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.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required.

Features:

• Exceptionally high working loads
  
• Low maintenance, long service life
  
• Self-lubricating sheave
  
• 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
  
• 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.: 400kg(880lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 71g(2.5oz)

Series 40 All Purpose Block - Single Upright Lead

Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Ideal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire.

Applications:

• Typically used for halyards at the mast base.

Materials:

• UV stabilised acetal sheave
• Grade 316 stainless steel load housing

Series 40 All Purpose Block - Triple - Swivel Head

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating sheave
• Slotted pin shackle eliminates fouled lines
• Two way head post
• Spare parts - RF41010 Replacement Becket Pin, RF150 Shackle

All 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.

Applications:

• Mainsheet
• Halyard
• Vang
• Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)

Materials:

• U.V. stabilised Acetal sheaves
• Impact and U.V. resistant, fibre reinforced Nylon cheeks
• Grade 316 stainless steel bearing race
• Grade 316 stainless steel load strap and head fitting
• Sheave: UV stabilised acetal
• Cheeks: Impact modified, fiber reinforced and UV stabilized nylon

Series 40 Ball Bearing Block - Fiddle

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
• Low friction, 2-stage ball bearing system
• High static and dynamic load capacity
• Lightweight
• Cheek cut-outs for easy bearing maintenance

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

Applications:

• Mainsheet
• Halyard
• Vang
• Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
• Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
• On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.

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

Series 40 Ball Bearing Block - Fiddle - 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)
• Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
• On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.

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

Series 40 Ball Bearing Block - Fiddle - Becket - Cleat

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
• Multi-position cleat arm
• Low friction, 2-stage ball bearing system
• High static and dynamic load capacity
• Lightweight
• Cheek cut-outs for easy bearing maintenance

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. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting and is i

Applications:

• Mainsheet
• Halyard
• Vang
• Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats  up to 8m (26ft)
• Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs
• On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.

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

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)

Series 40 Ball Bearing Block - Single Loop Top - Becket

Features:

• Low friction Acetal or Torlon® bearing system
• Lightweight
• Cheek cut-outs for easy bearing maintenance
• 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.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

Series 40 Ball Bearing Block - Single Upright Lead

Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal 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:

• Typically used for halyards at the mast base.

Materials:

• Acetal ball bearings
• UV stabilized Acetal sheave
• Grade 316 stainless steel load housing

Series 40 Ball Bearing Orbit Block - Cheek

Features:

• Ultra Lightweight
• Low friction 2-stage Orbital ball bearing system
• Highest working load in its class
• Low profile and compact
• High performance cleating
• Base suits curved mounting surface
• Low mounting points for maximum strength

Lightweight

Kilogram 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 Class

The 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.

Recommended fasteners - 3 x 4mm (5/32") countersunk head screws

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

Series 40 Ball Bearing Orbit Block™ - Single - Becket - Swivel 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.

Lightweight
Kilogram for kilogram of working load, BB 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 Class
The 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.

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:

• Spinnaker sheets on dinghies, sportsboats and small keel boats to 5M(16')
  
• Halyard, vang and backstay applications on boats to 8M(26')
  
• Control line applications on larger yachts

Materials:

• Ball Bearings - High compression stregnth carbon black Acetal
  
• Stage 2 Bearing - Glass fiber reinforced, MoS2 impregnated Nylon
  
• Frame/Cheeks - Toughened, glass fiber reinforced Nylon
  
• Sheave - Carbon fiber reinforced, PTFE impreganated Nylon
  
• Head fitting: Grade 316 stainless steel

Specifications:
Sheave Ø: 40mm(1-9/16")
M.W.L.: 325kg(715lbs)
B. L.: 650kg(1,430lbs)
Weight: 44g(1.6oz)

Series 40 Ball Bearing Orbit Block - Single - Stand-Up Swivel Head

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 -grade 316 stainless steel.
• Stainless steel shackle head for ultimate durability with harsh fixing points.

Lightweight

Kilogram 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 Class

The 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.

Recommended fasteners - 2 x 4mm (5/32") countersunk head screws

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 fiber reinforced, MoS2 impregnated Nylon
• Frame/Cheeks - Toughened, glass fiber reinforced Nylon
• Sheave - Carbon fiber reinforced, PTFE impregnated Nylon

Series 40 High Load Block - Single

Features:

• Exceptionally high working loads
• Lightweight
• Cheek cut-outs for easy bearing maintenance
• Suitable for both rope or wire
• Captive Lock™ universal head
• Slotted pin shackle eliminates fouled lines

Ideal for high load applications. Wear resistant sheave material, in lightweight, self lubricating polymer, is suitable for use with rope or wire.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required

Applications:

• Halyards
• Backstays
• Vang
• Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)

Materials:

• Nylatron® sheave
• Grade 316 stainless steel load strap and head fitting
• Impact and U.V. resistant, fiber reinforced Nylon cheeks

Series 40 High Load Exit Box for Single Rope or Wire

Plain bearing sheaves are ideal for halyards and other applications where high static loads are likely to be encountered

Applications:

• Ideal applications where lines (rope or wire) need to be led through decks, bulkheads or spars minimizing friction and chafing

Materials:

• Nylatron®l sheave
  
• Grade 316 Stainless Steel cheeks

Specifications:
Sheave Ø: 40.0mm(1-9/16")
Max. Rope Ø:10.0mm(3/8")
Max. Cable Ø: 5.0mm(3/16")
B.L.: 1,000kg(2,200lbs)

Series 45 Core Block - Single/Swivel Haylard

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 optimization and the cut-away design minimizes 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, minimizing 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
• Incorporates a low profile swivel head fork
• Features a removable screw pin for attachment to padeyes
• Suitable for 12mm (1/2") diam. mast collar post

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. stabilised Acetal
• Cheek body: Aluminium Alloy
• Ball Bearings: High compression strength carbon black Acetal
• Shackle, head post & hub: Grade 316 stainless steel

Series 45 Stand-Up Core Block - Swiveling

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 optimization and the cut-away design minimizes 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, minimizing 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
• Features a strong cast padeye base with a swivel head post to allow full rotation and articulation

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. stabilised Acetal
• Cheek body: Aluminium Alloy
• Ball Bearings: High compression strength carbon black Acetal
• Shackle, head post & hub: Grade 316 stainless steel

Series 50 All Purpose Block - Double

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating Acetal polymer sheave ensures low friction and extreme durability
• Slotted pin shackle eliminates fouled lines
• Lockable swivelling head post

All 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 can be locked at 0° or 90° by engaging the grub screw in either the 0 or 90 degree position.

Applications:

• Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)
• S60 - on boats up to 12m (40ft)

Materials:

• Grade 316 stainless steel load strap
• Impact and UV resistant, fiber reinforced Nylon cheeks

Series 50 All Purpose Block - Fiddle - Becket

Features:

• Exceptionally high working loads
• Low maintenance, long service life
• Self-lubricating Acetal polymer sheave ensures low friction and extreme durability
• Captive Lock™ universal head
• Slotted pin shackle eliminates fouled lines
• Snap fit removable becket pin
• Spare Parts - RF51010 Replacement Becket Pin, RF150 Shackle

All 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.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 and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)
• S60 - on boats up to 12m (40ft)
• Ideal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.

Materials:

• Grade 316 stainless steel load strap
• Impact and UV resistant, fiber reinforced Nylon cheeks

Series 50 All Purpose Block - Single - Universal Head

All 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. Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required

Features:

• Exceptionally high working loads
  
• Low maintenance, long service life
  
• Self lubricating sheave
  
• Captive Lock™ universal head
  
• Slotted pin shackle eliminates fouled lines

Applications:
Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10M(33')

Materials:

• Nylatron® sheave
  
• Grade 316 stainless steel load strap and head fitting
  
• Impact and U.V. resistant, fiber reinforced Nylon cheeks

Specifications:
Sheave Ø: 50mm(2")
Max. Rope Ø: 12mm(1/2")
Max. Pin Ø: 5mm(3/16")
M.W.L.: 750kg(1,650lbs)
B. L.: 1,500kg(3,310lbs)
Weight: 118g(4.1oz)