Harken 57mm Carbo Double Ratchet Block with Swivel
The Harken 57mm Carbo Double Ratchet Block with Swivel delivers exceptional holding power, smooth line handling, and precise control for performance dinghy sailing. Designed to reduce hand fatigue while maintaining responsive sail trim, this lightweight, high-strength block allows sailors to manage heavily loaded lines with greater ease and confidence.
Featuring two 57mm machined aluminum sheaves with a durable Hard Lube-anodized finish, the block provides excellent strength, corrosion resistance, and long-lasting performance. Eight-faceted sheaves grip the line securely, delivering an impressive 10:1 holding power ratio while allowing controlled easing when needed.
The switchable ratchet mechanism provides versatility across changing wind and sailing conditions. An easily accessible on/off switch on both sides of the block allows sailors to engage or disengage the ratchet quickly for optimal line control.
Ideal for high-performance dinghy mainsheet systems, the Harken Carbo Double Ratchet Block combines powerful grip, smooth operation, and lightweight construction for competitive racing.
Key Features:
-
10:1 Holding Power: Provides exceptional line grip, reducing the effort required to hold loaded sheets.
-
Dual 57mm Ratchet Sheaves: Machined aluminum sheaves with eight facets securely grip the line for reliable control.
-
Switchable Ratchet Mechanism: Easily engage or disengage the ratchet to suit sailing conditions and trimming preferences.
-
Dual-Sided On/Off Switch: Convenient access from either side of the block for quick adjustments.
-
Hard Lube-Anodized Finish: Enhances durability, strength, and corrosion resistance.
-
Controlled Line Easing: Balances powerful holding performance with smooth, predictable sheet release.
-
Lightweight, High-Strength Design: Built for demanding racing applications without unnecessary weight.
-
Swivel Attachment: Allows the block to align with changing sheet angles for efficient line handling.
Specifications:
|
Specification |
Details |
|---|---|
|
Brand |
Harken |
|
Sheave Diameter |
57 mm / 2 1/4" |
|
Length |
116 mm / 4 9/16" |
|
Weight |
195 g / 6.9 oz |
|
Maximum Line Diameter |
10 mm / 3/8" |
|
Maximum Working Load |
340 kg / 750 lb |
|
Breaking Load |
851 kg / 1,875 lb |
|
Shackle Pin Diameter |
6 mm / 1/4" |
|
Holding Power |
10:1 |
|
Ratchet Type |
Switchable On/Off |
|
Sheave Material |
Hard Lube-Anodized Aluminum |
