Ronstan Series 55 Ball Bearing Orbit Block™ - Single - Becket - Swivel Head
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 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. The Dyneema® Link is produced from FSE Robline SK75 fiber, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
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:
- Mainsheet systems on dinghies, sportsboats and small keelboats to 9M(30')
- Spinnaker sheets on dinghies, sportsboats and small keel boats to 9M(30')
- Halyard, Vang and Backstay application on boats to 8M(26')
- Control line applications on larger yachts
- Ideal use for mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel boats to 9M(30')
- Also ideal with halyard, vang and backstay applications on boats to 8M(26')
- Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks)
- Control line applications on larger yachts
Materials:
- Ball bearings - High compression strength carbon black Acetal
- Stage 2 bearing - Carbon fiber reinforced, PTFE impregnated Nylon
- Frame/Cheeks - Toughened, glass fiber reinforced Nylon
- Rope Link: UV stabilized, multi-strand impregmented SK75 Dyneema®
- Sheave: Carbon fiber reinforced, PTFE impregnated Nylon
- Head fitting: Grade 316 stainless steel.
Specifications:
Sheave Ø: 55mm(2-5/32")
Max. Rope Ø: 10mm(3/8")
M.W.L.: 500kg(1,100lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 88g(3.1oz)
- Product Name: Ronstan Series 55 Ball Bearing Orbit Block™ - Single - Becket - Swivel Head
- UPC Number: 9316800440405
- Shop by Brand: Ronstan
Welcome to the Everest Marketplace Seller Storefront, where we're on a mission to equip you with the gear that'll have you thriving in the great outdoors like a legendary Yeti. Whether you're into hunting, fishing, survival, or more, you've stumbled upon the right place!
Got questions about our products? Need to make a return or can't find what you're looking for? Reach out to us at 1-866-806-0934 or drop us a line at info@everest.com.
And hey, if you happen to be a seller with products listed under the Everest storefront, let's chat so we can match those items to your very own kingdom!
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In stock
We prioritize serving those who serve nature. Everest represents the boundless outdoors. Find out how we give back.
Ready to wrestle Yetis over prices? Everest is up for the challenge with our Price Match guarantee.
Shipping & Returns
All sellers will furnish tracking information for shipped products, whenever relevant. This tracking data enables you to keep tabs on the status of your shipment. If you purchase products from several sellers in one order, you will receive tracking information from each respective seller.
Following the dispatch of your order, Everest.com will send you an email notification containing the tracking details. Kindly ensure that the email address provided during the checkout process is accurate and up to date.
Returns are only accepted for products bought directly from Everest.com. To qualify for a return, the product must be unused, in its original condition, and with the original packaging intact. Some products may be exempt from the return policy. Should you wish to initiate a return, please reach out to the seller directly within 7 days from the date of delivery.
meet marcus
The Story of Marcus Moose
In the vast wilderness the Everest marketplace, a legendary customer service character emerged—Marcus Moose. With a passion for the outdoors rivaling even the mightiest Yeti, Marcus's mission was clear: guide people to embrace nature's wonders. Marcus, the guardian of adventure, ensured no one was left behind. The wilderness awaits, and with Marcus by your side, your wildest dreams are just a hoofstep away.
Shipping & Returns
All sellers will furnish tracking information for shipped products, whenever relevant. This tracking data enables you to keep tabs on the status of your shipment. If you purchase products from several sellers in one order, you will receive tracking information from each respective seller.
Following the dispatch of your order, Everest.com will send you an email notification containing the tracking details. Kindly ensure that the email address provided during the checkout process is accurate and up to date.
Returns are only accepted for products bought directly from Everest.com. To qualify for a return, the product must be unused, in its original condition, and with the original packaging intact. Some products may be exempt from the return policy. Should you wish to initiate a return, please reach out to the seller directly within 7 days from the date of delivery.
We prioritize serving those who serve nature. Everest represents the boundless outdoors. Find out how we give back.
Ready to wrestle Yetis over prices? Everest is up for the challenge with our Price Match guarantee.
meet marcus
The Story of Marcus Moose
In the vast wilderness the Everest marketplace, a legendary customer service character emerged—Marcus Moose. With a passion for the outdoors rivaling even the mightiest Yeti, Marcus's mission was clear: guide people to embrace nature's wonders. Marcus, the guardian of adventure, ensured no one was left behind. The wilderness awaits, and with Marcus by your side, your wildest dreams are just a hoofstep away.
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 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. The Dyneema® Link is produced from FSE Robline SK75 fiber, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.
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:
- Mainsheet systems on dinghies, sportsboats and small keelboats to 9M(30')
- Spinnaker sheets on dinghies, sportsboats and small keel boats to 9M(30')
- Halyard, Vang and Backstay application on boats to 8M(26')
- Control line applications on larger yachts
- Ideal use for mainsheet systems and spinnaker sheets on dinghies, sportsboats and small keel boats to 9M(30')
- Also ideal with halyard, vang and backstay applications on boats to 8M(26')
- Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks)
- Control line applications on larger yachts
Materials:
- Ball bearings - High compression strength carbon black Acetal
- Stage 2 bearing - Carbon fiber reinforced, PTFE impregnated Nylon
- Frame/Cheeks - Toughened, glass fiber reinforced Nylon
- Rope Link: UV stabilized, multi-strand impregmented SK75 Dyneema®
- Sheave: Carbon fiber reinforced, PTFE impregnated Nylon
- Head fitting: Grade 316 stainless steel.
Specifications:
Sheave Ø: 55mm(2-5/32")
Max. Rope Ø: 10mm(3/8")
M.W.L.: 500kg(1,100lbs)
B. L.: 1,000kg(2,200lbs)
Weight: 88g(3.1oz)
- Product Name: Ronstan Series 55 Ball Bearing Orbit Block™ - Single - Becket - Swivel Head
- UPC Number: 9316800440405
- Shop by Brand: Ronstan
Welcome to the Everest Marketplace Seller Storefront, where we're on a mission to equip you with the gear that'll have you thriving in the great outdoors like a legendary Yeti. Whether you're into hunting, fishing, survival, or more, you've stumbled upon the right place!
Got questions about our products? Need to make a return or can't find what you're looking for? Reach out to us at 1-866-806-0934 or drop us a line at info@everest.com.
And hey, if you happen to be a seller with products listed under the Everest storefront, let's chat so we can match those items to your very own kingdom!
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