Harken 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.
The Harken Ratchamatic version rolls freely in both directions under low loads and automatically engages 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 adjuts and lock in a wide range of positions for crew accessibility and accommodatin of changing lead angles.
|Sheave Diameter||3 in||75 mm|
|Max Line Diameter||7/16 in||12 mm|
|Max Working Load*||300 lb||136 kg|
|Breaking Load*||600 lb||272 kg|
|Weight||18 oz||514 g|
|Length||5 5/8 in||143 mm|
|Width||2 5/8 in||67 mm|
|Height||5 3/8 in||137 mm|
*Maximum working loads and breaking loads for blocks based on cam strengths.