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57mm Ratchamatic® Flip-Flop Block

Part No. 2144

Sheave Ø (mm) 57 mm

Sheave Ø (in) 2 1/4 in

Maximum line Ø (mm) 10 mm

Maximum line Ø (in) 3/8 in

Maximum working load (kg) 227 kg

Maximum working load (lb) 500 lb

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. Ratchamatic block 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.
Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)110 mm
Length (in)4 5/16 in
Width (mm)50 mm
Width (in)2 in
Height (mm)66 mm
Height (in)2 5/8 in
Weight (g)156 g
Weight (oz)5.5 oz
Maximum line Ø (mm)10 mm
Maximum line Ø (in) 3/8 in
Maximum working load (kg)227 kg
Maximum working load (lb)500 lb
Breaking load (lb)1000 lb
Breaking load (kg)554 kg

F R E E   G R O U N D  S H I P P I N G

for orders over $100!

Valid on orders shipping within the United States

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