Harken 57mm Ratchamatic Flip-Flop Block

Harken 57mm Ratchamatic Flip-Flop Block

Product Details


    Small Boat Flip-Flop blocks pivot around the line axis to keep line close to the deck. Hinged construction allows for various lead angles.

    Lightweight, machined 6061-T6 aluminum cheeks pivot on fiber-reinforced plastic chocks. Sheave runs exclusively on a ball bearing system for fast trim and release under any load. Ball bearings, sheave, and sideplates are UV stabilized with carbon black for maximum protection.

    Ratchamatic® versions roll freely in both directions under low loads and automatically engage a ratchet mechanism as loads increase, giving sailors a holding power of up to 15:1. The ratchet engagement can be adjusted to a higher or lower load depending on the sailor's strength, sailing style and system usage.

    Reversible cam arms adjust and lock in a wide range of positions for crew accessibility and to accommodation of changing lead angles.

    Part Number: 2144

    Tech Info

    Imperial Metric
    Sheave Dia. 2 1/4" 57 mm
    Width 2" 50 mm
    Length 4 5/16" 110 mm
    Height 2 5/8" 67 mm
    Max Line Dia. 3/8" 10 mm
    Weight 5.5 oz 156 gr
    Maximum Working Load 500 lbs 227 kg
    Breaking Load 1000 lbs 554 kg