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Harken Products

Harken 57mm SB Ratchamatic Flip (HK2144)

£212.08 | Normal Price: £235.64 | You Save: £23.56 (10%)


Harken 57mm Ratchamatic Flip Block

Small Boat Flip-Flop blocks pivot around the line axis to keep the 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 accommodation of changing lead angles.

Sheave Ø: 57 mm

Length: 110 mm

Width: 50 mm

Height: 67 mm

Weight: 156 g

Maximum line Ø: 10 mm

Maximum working load: 227 kg


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