Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel Head
SKU: 45163844221

Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel Head

Sale price$89.08 Regular price$98.98
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Ronstan Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel HeadSeries 40 Ball Bearing Orbit Block Single Becket Cleat 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 Lightweight Kilogram for kilogram of working load, BB and RT Orbit Blocks are the worlds lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimizes the mass of

Series 40 Ball Bearing Orbit Block - Single - Becket - Cleat - 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

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.

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

Manufacturer Part Numbers: RF45130
GRP:WRO
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45163844221

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Sritika Chakladar
Louisville, US
★★★★★ 5
Practical jewelry box
This jewelry box is both beautiful and functional. The finish looks elegant, and the compartments are well thought out for rings, earrings, and necklaces. It keeps everything organized and easy to find. The size is perfect to be carried for travel.
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Reviewed in the United States on August 14, 2025
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Alcyon
Phoenix, US
★★★★★ 5
Get Bejewelled
This box is very nice. It feels sturdy. The color is true to the product picture and the material feels nice. The size is as expected. This was a gift for a young woman; she loved it and that it was cute enough to "fill space" while also being functional.
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Reviewed in the United States on July 8, 2025
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Kateri Solberg
Lexington, US
★★★★★ 4
Great for travel or countertop
I ordered 9 of these for my four girls and all my nieces- in two of the nine, the trays sunk in without holding up, the others were great! I love how I can keep them out and they look pretty, or pack them away in luggage for easy transportation!
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Reviewed in the United States on July 12, 2025
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Abigail Bond
Natrona Heights, US
★★★★★ 5
Perfect box
Very sturdy and cute jewelry box!
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Reviewed in the United States on November 22, 2025
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Verified Purchase
Natalia Arlashina
West Palm Beach, US
★★★★★ 5
beautiful and high-quality jewelry box
Amazing jewelry box of good quality. color - exactly as in the photo (mine is olive). High-quality interior decoration. Everything as in the seller's photo. Highly recommend.
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Reviewed in the United States on May 1, 2025

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