The Ronstan Series 30 Utility Block, Triple, Loop Top is ideal for control lines and vangs, Cunninghams and trapeze retriever systems on dinghys, sailing canoes, and other small boats, and leech line tackles, bunk adjusters, and other dependable uses on larger boats and yachts. It has a triple sheave block with a loop head.
Features
UV stabilized Acetal sheaves running with stainless steel cheeks
High static and dynamic load capacity
Lightweight and durable
Specifications
Maximum rope diameter: 5/16 in. (7mm)
Maximum working load: 1210 lbs.
Sheave diameter: 1-1/8 in.
Breaking load: 2420 lbs.
Weight: 2.1 oz.
Ronstan Series 20 Ball Bearing Triple Block with Shackle Triple Ball Bearing block has sheaves that are 20mm in diameter. Ideal for powerful purchase systems on dinghy vangs, rig tensioning systems on skiffs, etc.
Features
Two-way head - can be fixed at 0 or 90 degrees
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel ball
Grade 316 stainless steel load strap and head fitting
High static and dynamic load capacity
Lightweight and durable
Specifications
Pin diameter: 5/32 in. (4mm)
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 880 lbs.
Sheave diameter: 3/4 in.
Breaking load: 1870 lbs.
Weight: 2.2 oz.
The Series 20 Ball Bearing Triple Block with Becket, Cleat and Shackle has a 2-way head that can be fixed at 0 or 90 degrees. It provides powerful, efficient adjustment and secure holding for important lines under load.
Typical applications
Mainsheet Systems: the triple block's three sheaves enable multi-part tackle (such as a 6:1 or 7:1 purchase) for the mainsheet, enabling easier and finer trimming of the mainsail, especially under heavy load.
Boom Vangs: provides similar purchase to control boom height and leech tension, crucial for sail shape and performance.
Backstay Adjusters: backstay systems may use such blocks to quickly adjust mast bend or forestay tension.
Component functions
Triple Sheaves: multiply pulling force and reducing the manual effort needed for control.
Becket: serves as an anchor point for the end of the control line, providing a starting/ending reference for the tackle setup.
Cleat: Integrated cam cleat allows locking off the line at any point, holding the adjustment hands-free.
Shackle: Provides a secure, detachable connection to a fixed point like a boom bale, traveler, deck padeye, or other fitting.
Specifications
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 880 lbs.
Sheave diameter: 3/4 in.
Breaking load: 1870 lbs.
Weight: 4.3 oz.
Pin diameter: 5/32 in. (4mm)
The Ronstan Series 30 Single Utility Block is ideal for control lines and vangs, Cunninghams and traveller controls on dinghys, sailing canoes, and other small boats.
Features
UV stabilized Acetal sheaves running with stainless steel cheeks
High static and dynamic load capacity
Lightweight and durable
Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase
Specifications
Maximum rope diameter: 5/16 in. (7mm)
Maximum working load: 660 lbs.
Sheave diameter: 1-1/8 in.
Breaking load: 1980 lbs.
Weight: 0.7 oz.
The Ronstan Series 30 Utility Block, Swivel Shackle and Becket is strong and virtually maintenance free.
Features
UV stabilized Acetal sheaves running with stainless steel cheeks
High static and dynamic load capacity
Lightweight and durable
Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase
Specifications
Maximum rope diameter: 3/8 in.
Maximum working load: 550 lbs.
Sheave diameter: 1-1/8 in.
Breaking load: 1100 lbs.
Weight: 1.9 oz.
Pin diameter: 3/16 in.
Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision moulded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction.
Ronstan designs and manufactures world-class blocks and pulleys for all types of sailing. The Series 20 uses 20mm ball bearing sheaves and fits 6mm or 1/4" line.
Features
Compatible with our in-house custom risers
Can be mounted side by side for multiple lines
Tip: use our custom riser to color code each lead block location
Specifications
Maximum working load: 500 lbs. or 250 kg.
Breaking load: 1210 lbs. or 550 kg.
Weight: 18g
The Ronstan Series 40 Single Universal Head Block is a great all around solution. A self-lubricating Acetal polymer sheave running on polished stainless steel races performs 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
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel balls
Sheave is self-lubricating
High static and dynamic load capacity
Grade 316 stainless steel load strap, head fitting, and bearing race
Slotted pin shackle eliminates fouled lines
Specifications
Maximum rope diameter: 3/8 in. (9mm)
Maximum working load: 880 lbs.
Sheave diameter: 1-9/16 in.
Breaking load: 2200 lbs.
Weight: 2.5 oz.
Ronstan designs and manufactures world-class blocks and pulleys for all types of sailing. The Series 20 uses 20mm ball bearing sheaves and fits 6mm or 1/4" line.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel ball
Grade 316 stainless steel load strap and head fitting
High static and dynamic load capacity
Lightweight and durable
Specifications
Pin diameter: 1/8 in. (3mm)
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 550 lbs.
Sheave diameter: 3/4 in.
Breaking load: 1210 lbs.
Weight: 0.7 oz.
Single sheave all purpose stand-up block from Series 40. 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.
UV stabilized Acetal sheaves
Impact and UV resistant, fiber reinforced polyamide cheeks
Grade 316 stainless steel load strap, head fitting and bearing race
Specifications
Maximum rope diameter: 3/8"
Maximum working load: 880 lbs.
Sheave diameter: 1-9/16"
Breaking load: 1760 lbs.
Weight: 2.5 oz.
Fastener diameter: 3/16" (5mm)
The Ronstan Series 40 Single All Purpose Block with Loop Top is a great all around solution. A self-lubricating Acetal polymer sheave running on polished stainless steel races performs 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.
Features:
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel balls
Sheave is self-lubricating
High static and dynamic load capacity
Grade 316 stainless steel load strap, head fitting, and bearing race
Specifications:
Maximum rope diameter: 3/8 in. (9mm)
Maximum working load: 880 lbs.
Sheave diameter: 1-9/16 in.
Breaking load: 2200 lbs.
Weight: 1.9 oz.
The Ronstan Series 20 Ball Bearing Single Block with Hook is ideal for connecting webbing loops on sails, including Cunningham and outhaul attachments.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel ball
High static and dynamic load capacity
Lightweight and durable
Low profile hook swivels for quick and easy attachment
Stainless steel hook suits rope, webbing and hard attachments
Grade 316 stainless steel load strap and head fitting
Specifications
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 220 lbs.
Sheave diameter: 3/4 in.
Breaking load: 440 lbs.
Weight: 0.7 oz.
The Ronstan Series 30 Ball Bearing Single Block with Swivel Shackle has a low friction 2-stage ball bearing system that provides consistent performance over the full working load range.
Features
UV stabilized Acetal sheaves running with stainless steel cheeks
High static and dynamic load capacity
Lightweight and durable
Specifications
Maximum rope diameter: 5/16 in. (7mm)
Maximum working load: 660 lbs.
Sheave diameter: 1-3/16 in.
Breaking load: 1650 lbs.
Weight: 1.2 oz.
Pin diameter: 5/32 in.
The Ronstan Series 30 Ball Bearing Block, Loop Top has a low friction 2-stage ball bearing system that provides consistent performance over the full working load range.
Features
Can be fitted with a shackle in either of two planes to allow correct alignment of the block
UV stabilized Acetal sheaves running with stainless steel cheeks
High static and dynamic load capacity
Lightweight and durable
Specifications
Maximum rope diameter: 5/16 in. (7mm)
Maximum working load: 660 lbs.
Sheave diameter: 1-3/16 in.
Breaking load: 1650 lbs.
Weight: 1 oz.
The Ronstan Series 30 Single Utility Block is ideal for control lines and vangs, Cunninghams and traveller controls on dinghys, sailing canoes, and other small boats.
Features
UV stabilized Acetal sheaves running with stainless steel cheeks
High static and dynamic load capacity
Lightweight and durable
Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase
Specifications
Maximum rope diameter: 5/16 in. (7mm)
Maximum working load: 660 lbs.
Sheave diameter: 1-1/8 in.
Breaking load: 1980 lbs.
Weight: 0.7 oz.
The Ronstan Series 20 Ball Bearing Single Block with Becket and Loop Top suits a variety of attachment methods. Can be fitted with a shackle in either of two planes to allow correct alignment of the block.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel ball
High static and dynamic load capacity
Lightweight and durable
Grade 316 stainless steel load strap and head fitting
Specifications
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 550 lbs.
Sheave diameter: 3/4 in.
Breaking load: 1210 lbs.
Weight: 0.6 oz.
The Ronstan Series 40 Single All Purpose Block is a great all around solution. A self-lubricating Acetal polymer sheave running on polished stainless steel races performs 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 removeable 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.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel balls
Sheave is self-lubricating
High static and dynamic load capacity
Grade 316 stainless steel load strap, head fitting, and bearing race
Slotted pin shackle eliminates fouled lines
Snap fit removable becket pin
Specifications
Maximum rope diameter: 3/8 in. (9mm)
Maximum working load: 880 lbs.
Sheave diameter: 1-9/16 in.
Breaking load: 2200 lbs.
Weight: 2.8 oz.
Pin diameter: 3/16 in.
Saddle eyes and padeyes are a lightweight, reliable solution for guiding lines on deck, secure attachment points, and serve as connecting points for shackles or slings. This 10mm size is great for dinghies, canoes, kayaks and other small boats, and lightweight tasks on larger vessels. The ferrule lowers friction when used as a fairlead, and spreads the load when used as a lashing point.
Features
Exceptionally high working loads for its size
Low maintenance, long service life
Mounts with 2 x 5mm (3/16") fasteners (not supplied)
Specifications
Maximum rope diameter: less than 3/8" (10mm)
Weight: 0.3 oz.
The Series 40 Series 40 Ball Bearing Orbit Block™ with Cam Cleat has a 2-way headpost that can be fixed at 0 or 90 degrees or swivel freely. The composite C-Cleat™ and fairlead provide powerful, efficient adjustment and secure holding for important lines under load.
PERFORMANCE MEETS RELIABILITY
The new Series 40 ball bearing Orbit Blocks™ provide 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 fibre 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 also 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 extremely 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 are adjustable for setting to your preferred cleating angle.
Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimise 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.
Applications
Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sport boats to 8m (26ft)
Halyard, vang and backstay applications on boats to 8m (26ft)
Control line applications on larger yachts
Specifications
Maximum rope diameter: 3/8 in. (9mm)
Maximum working load: 880 lbs.
Sheave diameter: 1-9/16 in.
Breaking load: 1760 lbs.
Weight: 6.2 oz.
Note: MWL based on maximum allowable line load through cleat of 175kg (385lb), 1:1 purchase. Total block load. Becket MWL = 400kg (880lb), BL 800kg (1760lb)
Eliminate binding and twist while maintaining significant strength with the Ronstan Eye & Eye Swivel, in 316 stainless steel with stainless steel ball bearings.
Features
Exceptionally high working loads for its size
Low maintenance, long service life
Smooth articulation from the ball bearings
Specifications
Breaking load: 2200 lbs.
Eye thickness (A): 1/4 in. (6.4mm)
Barrel diameter: 3/4 in. (20mm)
Eye to eye distance, on center: 2-3/32 in. (53mm)
Weight: 2.3 oz.
Ronstan Series 20 Ball Bearing Double Block with Becket and Shackle has sheaves that are 20mm in diameter and a dual axis head that allows the block to be fixed in either plane depending on application.
Features
Two-way head - can be fixed at 0 or 90 degrees
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel ball
Grade 316 stainless steel load strap and head fitting
High static and dynamic load capacity
Lightweight and durable
Specifications
Pin diameter: 5/32 in. (4mm)
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 770 lbs.
Sheave diameter: 3/4 in.
Breaking load: 1540 lbs.
Weight: 1.6 oz.
The Ronstan Series 40 All Purpose Block, Double, is a double sheave all purpose block with swivel shackle head (non-locking). A self-lubricating Acetal polymer sheave running on polished stainless steel races performs 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.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel balls
Sheave is self-lubricating
High static and dynamic load capacity
Grade 316 stainless steel load strap, head fitting, and bearing race
Specifications
Maximum rope diameter: 3/8 in. (9mm)
Maximum working load: 1320 lbs.
Sheave diameter: 1-9/16 in.
Breaking load: 2650 lbs.
Weight: 4.8 oz.
Pin diameter: 3/16 in.
The Ronstan Series 20 Cheek Block is ideal for control lines and vangs, Cunninghams and traveller controls on dinghys, sailing canoes, and other small boats.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel ball bearings
High static and dynamic load capacity
Lightweight and durable
Double through-bolt mounting for maximum load capacity.
Specifications
Maximum rope diameter: 1/4 in. (6mm)
Maximum working load: 550 lbs.
Sheave diameter: 3/4 in.
Breaking load: 1210 lbs.
Weight: 0.5 oz.
Fastener diameter: 5/32 in. (4mm)
The Ronstan Series 40 All Purpose Block, Double with Becket is a double sheave all purpose block with becket and swivel shackle head (non-locking). A self-lubricating Acetal polymer sheave running on polished stainless steel races performs 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.
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.
Features
Low friction, high performance, fiber reinforced polyamide sheave and cheeks, with precision moulded, UV stabilized Acetal sheaves running on stainless steel balls
Sheave is self-lubricating
High static and dynamic load capacity
Grade 316 stainless steel load strap, head fitting, and bearing race
Specifications
Maximum rope diameter: 3/8 in. (9mm)
Maximum working load: 1320 lbs.
Sheave diameter: 1-9/16 in.
Breaking load: 2650 lbs.
Weight: 5 oz.
Pin diameter: 3/16 in.
