SKU: 26397698041

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 Sep 4 - Sep 9

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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: 26397698041

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4.5 ★★★★★
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Neil Skinner
San Leandro, US
★★★★★ 5
Beautiful, Solid, and Well Made
Color: Walnut
Looks beautiful and holds my MacBook Air safely while it’s charging or resting. Going to buy another for my iPad. Heavy, well made using real wood and solid metal and is very adjustable. Outstanding product made with love and care!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 30, 2025
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Ram2015
Charlottesville, US
★★★★★ 5
Product Quality.
Color: Walnut
⭐️⭐️⭐️⭐️☆ “This stand is sturdy, stylish, and keeps my desk clutter‑free. The walnut wood and aluminum design looks premium, and the dual slots fit both my laptop and tablet securely. A bit pricier than basic stands, but worth it for the quality and organization.”
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Reviewed in the United States on November 16, 2025
E
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Evan M.
Natrona Heights, US
★★★★★ 5
Attractive and Functional
Color: Walnut
I bought this to prop up my MacBook Pro M2 to save space on my desk while I am using a dock. The base is nicely adjustable, and holds the laptop securely. Sturdy metal base and attractive wood side pieces. My MacBook has never felt like it might tip, and I have a cat who squeezes past it to reach my office window multiple times per day. If you like the look, I'd highly recommend it for functionality.
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Reviewed in the United States on March 6, 2025
B
Verified Purchase
Brandon
Omaha, US
★★★★★ 5
Great Tray For Storing My Everyday Carries
Size: 8.5" x 5.8" x 1.9", Color: Black
My everyday carry items (wallet, keys, etc.), used to just get thrown around wherever when I'd get home, but this little tray makes a great, defined, space for me to keep those things when I don't need them on me. The soft lining reduces the obnoxious sound of throwing keys on a hard surface, and of course keeps me from scratching up a surface. The build feels quality and I haven't seen any damage to it yet. Also the all black version with gold buckle looks quite good and adds a subtle touch of luxury. Absolute recommend for the price.
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Reviewed in the United States on April 15, 2026
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David Jordan
Battle Creek, US
★★★★★ 5
Just the right size to empty your pockets.
Size: 8.5" x 5.8" x 1.9", Color: Orange
Perfect size to empty my pockets when I get home. Fits my wallet, keys, AirPods, etc. excellent quality.
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Reviewed in the United States on March 21, 2026

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