Harken 57mm Cheek Ratchamatic® Block

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  • Regular price $201.00
  • Tax included.


The Carbo Ratchamatic® is a load-sensing ratchet block that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light-air modes is seamless.

Cheek: Line-shedding, small mounting footprint and drain holes. Mounts on port or starboard.

Sheave Ø (mm) 57 mm
Sheave Ø (in) 2 1/4 in
Length (mm) 83 mm
Length (in) 3 1/4 in
Weight (g) 89 g
Weight (oz) 3.1 oz
Maximum line Ø (mm) 10 mm
Maximum line Ø (in) 3/8 in
Fasteners (mm) M4 mm
Maximum working load (kg) 227 kg
Maximum working load (lb) 500 lb
Breaking load (lb) 2000 lb
Breaking load (kg) 907 kg
Footnote Includes fasteners and mounting pad.
Holding power 10:1