Description
Harken 57 mm Ratchamatic Block – Swivel, Cam Cleat
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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. Unloaded main and jib sheets run out freely during mark rounding and asymmetrical spinnakers free instantly during jibes.
Ratchet engagement may be adjusted to a higher or lower load according to strength and sailing style. The holding power of the 57mm bocks are up to 10:1.
| Imperial | Metric | |
| Sheave Diameter | 2 1/4 in | 57 mm |
| Max Line Diameter | 3/8 in | 10 mm |
| Max Working Load | 300 lb | 136 kg |
Additional information
| Vendor | |
|---|---|
| Sheave Size | |
| Block Type | |
| Block Model |
Ronstan Utility Series 40 Double Block with Becket, 2-Axis Shackle Head 
Ronstan Utility Series 40 Single Block, Stand Up 
Harken 22 mm Micro Double Block 
Ronstan Utility Series 50 Single Block with Becket, Loop Head 
Ronstan Utility Series 50 Single Block, Stand Up 
Harken 2.25" Upright Lead Block 
Ronstan Utility Series 50 Fiddle Block with Becket and Cam Cleat, Universal Head 
Ronstan Utility Series 40 Fiddle Block with Becket, Universal Head 
Ronstan Utility Series 40 Single Cheek Block (S.S. Cheeks) 
Ronstan Utility Series 50 Double Block, Universal Head 
Ronstan Utility Series 40 Single Block with Becket, Universal Head 