SKU: 34740335834

Ronstan Series 40 Ball Bearing Orbit Block - Cheek [RF45151]

Sale price$30.34 Regular price$33.71
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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23

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Description

Ronstan Series 40 Ball Bearing Orbit Block - Cheek [RF45151]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 worlds lightest. The unique orbital design allows the bearing to only be in the active areas of

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
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: 34740335834

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4.3 ★★★★★
Based on 16 reviews
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K
Verified Purchase
Kimberly A.
Los Angeles, US
★★★★★ 5
Satisfied customer
Color: Espresso, Size: 22"D x 39.9"W x 18.1"H
Easy to assemble and looks terrific! I couldn't be happier with this purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
G
Verified Purchase
gamil
Charlottesville, US
★★★★★ 3
It's okay
The table looks nice and works fine, but the quality is just average. Assembly took some time, and a few parts didn’t fit perfectly. Overall, it’s an okay product for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 4, 2025
B
Verified Purchase
Bob
Chelsea, US
★★★★★ 5
Great value sturdy and Kid resistant
Color: White, Size: 22"d x 39.9"w x 18.1"h
Purchased 3 of these in May 2022 for part of an updating project for a vacation rental house in Panama City Beach FL. They were easy to assemble especially after the first one was done and assembling the remaining 2 was a breeze! Furniture takes a real beating especially from children in a vacation rental and has to be replaced more often than in a personal home. The low price of these coffee tables made them very attractive. It has been 1.5 years now since they were installed and there is absolutely no wear and tear showing on any of them. There are no ring marks on the tops from guests placing cold drinks that sweat that typically will damage tops of more expensive wood end tables. We also purchased matching coffee tables with the same experience.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 24, 2023
M
Verified Purchase
Mara
San Leandro, US
★★★★★ 5
What a great surprise!
Size: 8 Cube Shelf, Size: 8 Cube Shelf
Color me surprised. This is actually made of wood! Very smooth all the way around and the easiest assembly of this type of product I have ever encountered. I put a 9 cube Closetmaid together 7 months pregnant, sooo tedious with particle board splinters, I would have paid good money to have known about this company then. This is extremely stable, so much so that I have no fear moving it around, unlike the Closetmaid we have. The bins that come with it are nice quality, fit snugly into the cubes, and give it a nice look. Only issue I had, and I’m short so the leverage was the issue, were back panels. They are made of wood and fit snug, which is great, but that meant sliding them along the grooves was challenging until I stood it up on its end so I had better pressure and control. I’ll be using this one for homeschooling but I’ll definitely buy more for my library, these fit my bungalow upstairs perfectly. I’m going to sand some spots around the screws and stain it sometime.
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Reviewed in the United States on October 10, 2025
B
Verified Purchase
BAA
Boise, US
★★★★★ 5
Excellent 8 Cube Storage Organizer
Size: 8 Cube Shelf
This is a wonderful cube storage organizer and I have nothing but good things to say about them (I got 3). They arrived in special packing that protected every piece of the shipment. Nothing was damaged or missing. However, I did receive a few extra hardware pieces that had no use that I could see. The assembly was easy and the quality/grain of the wood was so nice that I decided not to paint it. Also, I was very pleased with the real wooden back panels - no cardboard on this unit. Every screw hole and back-panel slots lined up perfectly with its counterpart and fit together without any adjustments. As a bonus, each unit came with 4 nice, sturdy, fabric storage bins. The only "con" I have about the unit was that there was no indication in the Amazon description that these units came from China. I did not know until the boxes arrived and I could see the country of origin. My 3 units are placed side-by-side and make a lovely bookcase/room divider.
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Reviewed in the United States on October 11, 2025

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