SKU: 34716991861

Ronstan Series 100 Orbit Block, Single, Universal Head

$275.06 $305.62
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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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:
  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: 34716991861

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4.9 ★★★★★
Based on 28 reviews
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Verified Purchase
David H. Lee
Omaha, US
★★★★★ 5
Great socks!!!
Size: X-Large, Color: Beige/Cream/Green
Great product. Fit and comfort outstanding
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
S
Verified Purchase
Scot Atkinson
Louisville, US
★★★★★ 5
Comfortable and good fit.
Size: Large, Color: Black
Nice and comfortable Under Armour socks. Great buy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
K
Verified Purchase
Kevin
Louisville, US
★★★★★ 5
Socks
Size: Medium, Color: Beige/Cream/Green
These socks are great. Love them. Very warm too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
D
Verified Purchase
DE
Dallas, US
★★★★★ 5
good but pricey
Size: X-Large, Color: White / Steel - 100
good materials, size fits, very soft and durable but is a bit expensive
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Reviewed in the United States on May 5, 2026
P
Verified Purchase
Phillip A. Mccune
Carnegie, US
★★★★★ 5
Great socks great price
Size: Large, Color: Black
Great socks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026

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