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Description
Ronstan Orbit Series 30 Single Block w/ Swivel Shackle Head & Self-Lubricating Nylatron SheaveProduct Description Ronstan Orbit Series 30 Single Block w Swivel Shackle Head & Self Lubricating Nylatron Sheave Features Lightweight Highest working load in its class Secure, versatile and secure attachment Low profile and compact Ultra low profile thru sheave becket Self lubricating Nylatron sheave and full contact bearing for high dynamic loads Sheave 1 3 16 in. Max. Rope 5 16 in. Max. Cable in Pin in. M. W. L. 661 lb. B. L. 1323 lb. Weight 1. 1
Product Description
Ronstan Orbit Series 30 Single Block w/ Swivel Shackle Head & Self-Lubricating Nylatron Sheave
Features
Lightweight
Highest working load in its class
Secure, versatile and secure attachment
Low profile and compact
Ultra low profile thru-sheave becket
Self-lubricating Nylatron® sheave and full contact bearing for high dynamic loads
Sheave Ø - 1 3/16 in.
Max. Rope Ø - 5/16 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 661 lb.
B. L. - 1323 lb.
Weight - 1.1 oz.
Applications
Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft)
Halyard, vang and backstay applications on boats to 5m (16ft)
Control line applications on larger yachts
Materials
Sheave: High compression strength carbon black Acetal
Ball Bearings: High compression strength Acetal
Frame/Cheeks: Toughened, glass fiber reinforced Nylon
Link: UV stabilized, multi-strand impregnated SK75 Dyneema®
Features
Sheave Ø - 1 3/16 in.
Max. Rope Ø - 5/16 in.
Max. Cable Ø - in
Pin Ø - in.
M.W.L. - 661 lb.
B. L. - 1323 lb.
Weight - 1.1 oz.
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
4.6 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Perfect Mug Warmer
Color: Black
I bought this to replace one I'd had for more than 25 years & I'm glad I got this one. Keeps my hot drinks hot for hours & will shut off after that. Quickly heats back up when needed. Very sleek looking. Easy to set up. Just take it out of the box & plug it in.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
I love it for my workspace! Hot tea all day
Color: Wood Grain
I love this item. The size is perfect, as I prefer something less bulky for my work desktop. It isn't as fancy as others that has the digital display screen, which is fine by me, because I don't necessarily need that. The knob and different colors that indicate the temperature range works fine. The temperature on this thing works fantastically well for me. Using it on the lowest setting keeps my drink nice and hot in a cold office. I use a heatproof glass teapot with this and its a good fit. It keeps my tea hot throughout the day, so I am able to pour smaller amounts of drink and take my time sipping it throughout the day without worrying that it will get cold. At point I almost forgot that it has an automatic shut-off safety feature when I noticed it was off. So that is a good feature to have. I highly recommend this.
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Reviewed in the United States on January 15, 2026
★★★★★ 4
Requires a very specific mug to be useful.
Color: Black
The hotplate itself gets hot enough on its highest setting where it would burn your finger if you left it one there for more then a couple seconds. However when it come to what mug you can use to transfer that heat to your drink, this WILL NOT work with just any old ceramic, metal or glass mugs. You absolutely need to have a perfectly flat bottom on it. If the center of the bottom of the mug does not make direct contact with the very center of the warmer, it will not transfer heat. So straight way plan of spending another $15 to $20. Amazon has some available with good reviews all be it not a very big selection. I'm giving this 4 stars because the description needs to be very clear about this and its not.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Great mug warmer with temp control
Color: Black
I replaced a cheap mug warmer with a couple of these for the house, and for almost the same price this is a lot more functional. I really like the temperature control and silicone surface protector. In combination with the carafe below, this has changed my life - no more microwaving coffee all morning.
https://www.amazon.com/GiNT-Stainless-Thermal-Thermos-Retention/dp/B07MW5N7MS
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Super Satisfied Customer Here!
Color: Gold, Color: Gold
I purchased the gold/black mug warmer. I always spend a good about of money for great coffee products and I take my time to perfect my coffee for my mornings at work. However, I get pulled into urgent meetings and just something urgent and I always leave more than half of my coffee behind. When I come back it’s cold and that’s very disappointing considering the money and time I spent to make it bc I then have to toss it. I don’t believe in microwaves and I refuse to use one. When I found this, I was super excited! It looks perfect at my desk and it works perfect! I would have liked it to be more on the brass gold like my pen holder, but it’s just as pretty! As you can see, my mug had a layer on the bottom and that made me think it may not work well, but it did the job. My coffee was super warm and it got even hotter as I left it there tearing it. I turned it one before making my coffee, so I’m not sure exactly how long it took to warm up but for me, by the time I got back, it was the peg temperature. I highly recommend this to anyone who has the same struggles. No more cold coffees! Thank you!!!
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Reviewed in the United States on January 21, 2026