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Description
Ronstan Orbit Series 75 Single Stand-Up 90 Degree BlockProduct Description Ronstan Orbit Series 75 Single Stand Up 90 Degree 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
Product Description
Ronstan Orbit Series 75 Single Stand-Up 90 Degree 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 - in.
Max. Working Load - 4390 lb
B. L. - 8770 lb
Weight - 16.9 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 - in.
Max. Working Load - 4390 lb
B. L. - 8770 lb
Weight - 16.9 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
4.8 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 1
Beautiful watch but flawed
Color: Gold Face/Gold Band, Color: Gold Face/Gold Band
This is a decent quality watch for the price. Been wearing daily for a few months now. It has maintained its color and been resistant to scratches. The sub dials are a fully functional timer/chronograph. Calendar is great addition. The band is good quality with tight fit. Mine came with a sizing tool which was awesome. Removed 3 links for a perfect fit. Not a big fan of the butterfly latch on the band as it can release when you bend your hand down, but for the look and price, I don't mind. Unfortunately, the other day, I took the family to Lake Tahoe where I slipped into the water at the shore. It was about a foot deep and soaked my clothes but no big deal. Shortly after I checked the time and saw water on the inside of the glass. I then noticed the reset button for the chronograph had fallen out. I thought it must have been from falling into the water though I couldn't understand how my wrist could have jarred the button out. When I got home, I found the button on the floor in front of the watch box that I keep it in. This means it just randomly fell out. It pushes back in but can be easily removed and the chronograph no longer works at all. The watch still runs but the water doesn't seem to want to dry out. Very disappointed as I really liked this watch. I wanted to contact Olevs about the 12 month quality warranty they claim on Amazon but couldn't find a way to contact them directly on Amazon. No contact info or links. The only options were product and seller feedback. Oh, and an address in China. Not much help. Glad to revise my review if the seller reaches out.
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Reviewed in the United States on April 21, 2024
★★★★★ 5
Stunning Automatic Watch With TopTier Durability and Precision
Color: Grey
“I got this Tissot PRX for my cousin’s birthday and bro fell in LOVE instantly.
This thing keeps time like a beast, never slows down, never lags. Automatic movement, so no batteries, no drama.
Durability? Stupid good. You can hit it, bump it, live life rough, it still looks box fresh.
Size wise it was almost perfect. I just had to remove two links, nothing big.
It’s light, functional, comfortable, doesn’t weigh you down, doesn’t get in the way but more importantly I can say this watch is in everyone’s eyesight when we wear it. Cause of course I had to get another one!
Basically. I gave him a very nice piece as a gift, and now he’s walking around like he owns Switzerland.
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Reviewed in the United States on December 11, 2025
★★★★★ 5
Great watch!!!!
Color: Grey
Excellent quality, one of the best, elegant.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Excellent value for an automatic watch, keeps VERY good time.
Color: Grey, Color: Grey
I've only had the watch for a day but wanted to leave a quick review on it to share a couple of notes.
So far it keeps VERY good time, better than any of the automatics I own (including a Rolex Submariner, Tag Heuer Aquaracer, Tag Heuer Formula One, and several other sub $1k watches). I set it to an atomic time app on my phone yesterday and 24 hours later it's still SPOT on - hasn't gained/lost even a 1/10 of a second. I was shocked to see it's kept PERFECT time for the last day, I'm really blown away so far. I've worn it the entire time, we'll see how well it keeps time while being stored in a winder.
This picture shown is the watch with a 22mm leather band on it, fit's without any issues (just need to squeeze in the leather a tad). I doubt it would work with a 22mm metal bracelet, but leather works great. Just FYI since the 21mm lug width is kind of odd.
The face isn't quite a lustrious as the images make it look, but it's still a great-looking watch. For a sub $1000 automatic you can't go wrong, this is a fantastic watch at a great price. It'll be my daily driver for some time I'm sure. If I have any issues in the future I'll update the review.
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Reviewed in the United States on March 22, 2021
★★★★★ 5
It looks really cool and striking.
Color: Grey, Color: Grey
Really cool and beautiful watch. Although my specific unit runs 5 seconds fast every day—at first it’s annoying, but eventually you stop caring. 🤣
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Reviewed in the United States on April 16, 2026