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Description
Ronstan 75mm Double Core Foot BlockProduct Description Ronstan 75mm Double Core Foot 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 aluminium alloy cheek plates Central hub hole can be used as a becket take off or tie up point Sheave 3 in. (75 mm) Max. Rope in. (mm) Max. Cable in. (mm) Pin in. (mm) M. W. L. 3300 lb. (1500** kg) B. L. 6600 lbs.
Product Description
Ronstan 75mm Double Core Foot 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 aluminium alloy cheek plates
Central hub hole can be used as a becket take-off or tie-up point
Sheave Ø - 3 in. (75 mm)
Max. Rope Ø - in. (mm)
Max. Cable Ø - in. (mm)
Pin Ø - in. (mm)
M.W.L. - 3300 lb. (1500** kg)
B. L. - 6600 lbs. (3000** kg)
Weight - 18.7 oz. (530 g)
** - Total block load. Maximum load on top sheave not to exceed 50% of total block load
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 optimisation and the cut-away design minimises 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.
Applications
Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14m (46ft).
General applications on larger yachts.
Alloy sheave models are available for use with wire.
Materials
Sheave: U.V. stabilised acetal or anodised aluminium (AW models).
Cheek plates: Aluminium alloy
Ball Bearings: High compression strength carbon black acetal.
Features
Sheave Ø - 3 in. (75 mm)
Max. Rope Ø - in. (mm)
Max. Cable Ø - in. (mm)
Pin Ø - in. (mm)
M.W.L. - 3300 lb. (1500** kg)
B. L. - 6600 lbs. (3000** kg)
Weight - 18.7 oz. (530 g)
** - Total block load. Maximum load on top sheave not to exceed 50% of total block load
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 optimisation and the cut-away design minimises 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.
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
4.4 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 1
Poor product expires soon
Very disappointed. Received today and expires in 2 months.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 30, 2026
★★★★★ 5
Proteccion muy confiable para los niños
📝 RESEÑA
Me gustó mucho este protector solar para niños. Es fácil de aplicar, no deja la piel pegajosa y se absorbe bastante bien. Lo he usado varias veces y siento que realmente protege del sol, incluso en días de mucho calor.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
This stuff is great!
So much easier than rubbing in sunscreen. My toddler has fair skin and she has not burned at all while using this sunscreen
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Reviewed in the United States on June 8, 2024
★★★★★ 5
Excellent
Excellent, 100% recommended
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Reviewed in the United States on November 19, 2025
★★★★★ 5
Protector solar
Es excelente, buena calidad 👌 10/100
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Reviewed in the United States on September 10, 2025