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Description
Ronstan Orbit Series 75 Double BlockProduct Description Ronstan Orbit Series 75 Double Block Features The highest strength to weight ratio Minimal friction loss, especially when working at high loads Totally reliable and trouble free performance Simplicity of design and construction to facilitate maintenance and servicing Elegant, functional styling and finish. Lockable swiveling head post High strength forged shackle Sheave 3 in. Max. Rope 9 16 in. Max. Wire in. Pin 5 16 in. Max.
Product Description
Ronstan Orbit Series 75 Double Block
Features
The highest strength-to-weight ratio
Minimal friction loss, especially when working at high loads
Totally reliable and trouble free performance
Simplicity of design and construction to facilitate maintenance and servicing
Elegant, functional styling and finish.
Lockable swiveling head post
High strength forged shackle
Sheave Ø - 3 in.
Max. Rope Ø - 9/16 in.
Max. Wire Ø - in.
Pin Ø - 5/16 in.
Max. Working Load - 7500 lb
B. L. - 14990 lb
Weight - 20.3 oz
Product Information
Orbit blocks™ are a no-compromise product range developed to meet the demands and expectation 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 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.
Head posts of swivel blocks can be locked at 0 or 90 degrees.
Applications
Primary mainsheet, halyard and spinnaker systems on boats to 14m (46ft)
Secondary mainsheet, vang blocks on boats to 15m (50ft)
Standard and running backstay systems on boats to 12m (40ft)
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
Forged grade 17-4PH stainless steel shackles
Grade 316 stainless steel head post
Features
Sheave Ø - 3 in.
Max. Rope Ø - 9/16 in.
Max. Wire Ø - in.
Pin Ø - 5/16 in.
Max. Working Load - 7500 lb
B. L. - 14990 lb
Weight - 20.3 oz
Product Information
Orbit blocks™ are a no-compromise product range developed to meet the demands and expectation 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 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.
Head posts of swivel blocks can be locked at 0 or 90 degrees.
Applications
Materials
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
4.7 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 3
Too loose
Size: Large, Color: Brown
The size ran too big/loose. For example, it you tend to wear Large, order a Medium for this instead.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
★★★★★ 5
great value
Size: Small, Color: Dark Blue
excellent
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2026
★★★★★ 1
Construction is quite inferior and it stays badly wrinkled
Size: X-Large, Color: Dark Blue
Inferior construction. The mock turtle neck did not stay up but folded over.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
Men’s mock golf shirt
Color: Lake Green, White, Black, Size: XX-Large
Fit & quality very good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
★★★★★ 5
Nice Fit
Color: Black, White, Light Gray, Size: 3X-Large
I picked this up looking for something simple but clean, and it delivered. The fit is comfortable, the material feels solid, and it looks good without needing much effort. It’s one of those pieces you can throw on and still look put together.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
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