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Description
Ronstan 60mm Single Fiddle w/ Snap Shackle Head Core BlockProduct Description Ronstan 60mm Single Fiddle w Snap Shackle Head 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 Versatile trunnion snap shackle Provides quick & simple attachment and removal 360 degree relation with
Product Description
Ronstan 60mm Single Fiddle w/ Snap Shackle Head 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
Versatile trunnion snap shackle
Provides quick & simple attachment and removal
360 degree relation with side-to-side articulation
Integrated becket through the hub of the lower sheave
Sheave Ø - 2 3/8 + 1 3/16 in. (60 + 30 mm)
Max. Rope Ø - 1/2 in. (12 mm)
Max. Cable Ø - in. (mm)
Pin Ø - 5/16 in. (8 mm)
M.W.L. - 2200 lbs. (1000 kg)
B. L. - 4410 lbs. (2000 kg)
Weight - 14.2 oz. (405 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.
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.
Ideal for creating simple vang and mainsheet systems up to 4:1 on boats to 12m (40ft)
Materials
Sheave: U.V. stabilized Acetal or anodized aluminum (AW models)
Cheek plates: Aluminum alloy
Ball Bearings: High compression strength carbon black Acetal
Snap shackle: 15-5PH investment cast stainless steel
Features
Sheave Ø - 2 3/8 + 1 3/16 in. (60 + 30 mm)
Max. Rope Ø - 1/2 in. (12 mm)
Max. Cable Ø - in. (mm)
Pin Ø - 5/16 in. (8 mm)
M.W.L. - 2200 lbs. (1000 kg)
B. L. - 4410 lbs. (2000 kg)
Weight - 14.2 oz. (405 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.
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
4.2 ★★★★★
Based on 559 reviews
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Product Reviews
★★★★★ 4
Excellent quality for an excellent price tag
Color: Blue, Size: Medium
The suit arrived in 2 days after ordering; it arrived in excellent condition, was wrapped in clear plastic, however it was only in one package and should have been wrapped in a second layer in case of accidentally opening during the shipping process.
The suit was folded very neatly, I'll keep it as is as it's a gift for a friend of mine who is a musician and he will use it for
performance on stage. The size was M and correct. Unfortunately, it has arrived in the wrong color, I ordered blue, and purple has been delivered.
I hope, he likes it anyway. I'll keep it as it is too inconvenient for me to exchange it and ship it back to the sender.
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Reviewed in the United States on August 16, 2025
★★★★★ 5
Beautiful suit
Color: Purple, Size: Small
Suit is better than I expected. Bought this for my son for prom. The sequins POP. I am highly satisfied with this purchase. My son is 5'6 about 130 lbs and I ordered a size XS and it fit perfect. The only complaint I have is there is a hole for a button but no button is attached to the suit. Besides that, GET IT.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Great suit
Color: Purple, Size: X-Small
Fit my husband perfectly for our friends wedding and it was comfortable. It doesn't get wrinkled fast if at all. The quality was not bad for the price.
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Reviewed in the United States on January 14, 2026
★★★★★ 1
Sent Used suit
Color: Gold, Size: Medium
Sent a used smelly suit! Body odor bad on arm pits and cologne smell.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
★★★★★ 5
Great product and Great seller!
Color: White/White Pants, Size: Medium
The suit it self was gorgeous! But the best thing was the great customer service from this seller. They message you, ask for your size to ensure you get the right suit size
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Reviewed in the United States on March 13, 2026