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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
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Description
Ronstan Series 100 Orbit Block, Single, Universal HeadProduct Description Ronstan Series 100 Orbit Block, Single, Universal Head Product Information Orbit blocks are a no compromise product range developed to meet the demands and expectations of the very dedicated and increasingly professional racing sailor. Side cheeks incorporating head structure and hub are precision machined as a single part from solid alloy, leaving material only where it contributes to the load carrying capacity of the block and
Product Description
Ronstan Series 100 Orbit Block, Single, Universal Head
Product Information
Orbit blocks™ are a no-compromise product range developed to meet the demands and expectations of the very dedicated and increasingly professional racing sailor. Side cheeks incorporating head structure and hub are precision machined as a single part from solid alloy, leaving material only where it contributes to the load carrying capacity of the block and eliminating the need for additional fasteners. The Orbit sheave has captive acetal or Torlon® ball bearings for side thrust loads, eliminating the need for side retainer plates. This reduces weight and allows for a wider bearing surface that can accommodate longer Torlon® needles – achieving a substantially higher strength-to-weight ratio.
Features
- The highest strength-to-weight ratio
- Minimal friction loss, especially when working at high loads
- Captive ball bearings for side thrust loads
- Totally reliable and trouble free performance
- Simplicity of design and construction to facilitate maintenance and servicing
- Elegant, functional styling and finish.
Specifications
- Sheave Ø - 4 in.
- Max. Rope Ø - 5/8 in.
- Pin Ø - 3/8 in.
- M.W.L. - 9350 lb.
- B.L. - 18700 lb.
- Weight - 25.4 oz.
Applications
- Primary mainsheet, halyard and spinnaker systems on boats to 16m (53ft)
- Secondary mainsheet, vang blocks on boats to 18m (60ft)
- Backstay systems on boats to 14m (46ft)
- General control line and lead block applications on larger yachts
Materials
- Fully machined Alloy cheek plates
- Alloy sheaves with captive ball races
- Torlon® needle rollers
- Carbon black Acetal ball bearings
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.6 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Good quality
Fits perfectly
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Reviewed in the United States on February 5, 2026
★★★★★ 5
Perfect fit for boyh filters
Watched a youtube video, easy changed both filters in 10 minutes.
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Reviewed in the United States on January 18, 2026
★★★★★ 5
Easy to install
Fit like a glove easy to insert
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Reviewed in the United States on January 13, 2026
★★★★★ 5
Excelente
Excelente
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Reviewed in the United States on November 5, 2025
★★★★★ 5
With the word Trilogy, made me think I was getting all 3
Arrival was great and on time. Thought I was getting the timepiece the second in trilogy. But will keep it and order the other two of the series I typed in the name “Timepiece” and got The Christmas Box, thinking I was possibly getting all 3. I guess that is my mistake
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Reviewed in the United States on August 11, 2025