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Description
Ronstan 60mm Halyard, Aluminum Wire Sheave Core BlockProduct Description Ronstan 60mm Halyard, Aluminum Wire Sheave Core Block Features Class leading performance and sleek, contemporary styling Excellent dynamic and high static load performance Less than half the friction of the nearest competitor Durable aluminum alloy cheek plates Central hub hole can be used as a becket take off or tie up point Durable alloy Rope Wire sheave Suits direct attachment to mainsail headboard for 2: 1 halyard Removable 8mm
Product Description
Ronstan 60mm Halyard, Aluminum Wire Sheave Core Block
Features
Class leading performance and sleek, contemporary styling
Excellent dynamic and high static load performance
Less than half the friction of the nearest competitor
Durable aluminum alloy cheek plates
Central hub hole can be used as a becket take-off or tie-up point
Durable alloy Rope/Wire sheave
Suits direct attachment to mainsail headboard for 2:1 halyard
Removable 8mm (5/16”) threaded pin at head
Acetal roller on head pin to suit spliced line attachment
Measurements
Sheave Ø - 2 3/8 in. (60 mm)
Max. Rope Ø - 1/2 in. (12 mm)
Max. Cable Ø - 3/16 in (5 mm)
Pin Ø - 5/16 in. (8 mm)
M.W.L. - 2200 lb. (1000 kg)
B. L. - 4410 lb. (2000 kg)
Weight - 7.5 oz. (212 g)
Product Information
Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimization and the cut-away design minimizes weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimizing rope wear.
Acetal & aluminum sheave options
Selected models are available with an aluminum sheave which has a deep groove profile specifically made for use with wire.
Applications
Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 12m (40ft).
Various control line applications on larger yachts.
Alloy sheave models are available for use with wire.
Materials
Sheave: U.V. stabilized Acetal or anodized aluminum (AW models)
Cheek plates: Aluminum alloy
Ball Bearings: High compression strength carbon black Acetal
Pin: 2205 stainless steel
Features
Measurements
Sheave Ø - 2 3/8 in. (60 mm)
Max. Rope Ø - 1/2 in. (12 mm)
Max. Cable Ø - 3/16 in (5 mm)
Pin Ø - 5/16 in. (8 mm)
M.W.L. - 2200 lb. (1000 kg)
B. L. - 4410 lb. (2000 kg)
Weight - 7.5 oz. (212 g)
Product Information
Core Blocks™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy cheek plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimization and the cut-away design minimizes weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimizing rope wear.
Acetal & aluminum sheave options
Selected models are available with an aluminum sheave which has a deep groove profile specifically made for use with wire.
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
4.5 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Great powerful little fan, good deal.
Color: Black
Nice powerful fan, good price! larger than an average desktop fan, keeps the air moving, and is fairly quiet.
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Good value for a powerful fan.
Color: Black
Powerful fan. It’s just a 100 square foot room but you can feel the fan clear across the room. The unit feels durable but it is also extremely lightweight. Easy to move room to room. The fan can face straight ahead or angle to face upwards. It is easy to change the angle of the fan, simply tilt the body and it clicks into place. It does not face downward. When faced upwards it does well to circulate air around the room. It is somewhat loud on higher settings but that is to be expected. At $14.99 this was priced a bit lower than similar units. It’s a good value so far as it is performing well.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Reliable Cooling Power for My Workspace
Color: White, Color: White
This Honeywell TurboForce fan has been a perfect addition to my home office on Staten Island, providing a surprising amount of airflow for such a compact unit. The three speed settings allow me to adjust the intensity based on how warm the room gets, and I’ve found the 90-degree pivoting head incredibly useful for circulating air without having it blow directly on my desk papers. It runs remarkably quietly even on the highest setting, which is essential during long focus sessions or video calls. The white finish looks clean and professional on my tabletop, and the overall build quality feels sturdy enough to handle daily use throughout the summer months.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Small but powerful
Color: Black
This is a small but powerful, 3-speed fan with a 90 degree pivoting head. It's also good looking, lightweight, sturdy, and quiet. The controls are easy to reach and manipulate. The lowest speed was actually too powerful for the location I had in mind for it but I highly recommend it for anyone wanting to cool a room. You can easily cool a small room on just the lowest setting. I'm sad I have to return it but I need something a little less powerful for my desired location.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Perfect Teacher Water Cup for Long School Days
Size: 40 Ounces, Color: Rose Quartz 2.0
As a teacher, I carry this with me constantly, and it’s honestly been one of my most-used purchases. The 40 oz size is great because I can fill it once in the morning and not constantly worry about refilling it throughout the school day.
It keeps water cold for hours, even when it’s sitting in my classroom all day, and the handle makes it much easier to carry along with everything else teachers somehow end up holding. I also like that it fits in my car cup holder despite being large.
The straw lid is convenient for quick sips during class, and the Rose Quartz color is really pretty without being too flashy. The cup feels sturdy and well made, and it’s held up well to daily use.
The only downside is that when completely full, it can feel a little heavy, but that’s expected with a large stainless steel tumbler. Overall though, it’s been incredibly practical for staying hydrated during busy teaching days.
Definitely worth it if you’re someone who’s constantly on the go and wants cold water all day.
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Reviewed in the United States on May 10, 2026