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Single Block with Swivel Shackle Head - Series 40 - Smart Ratchet
The load-sensitive ratchet engages automatically when the sheet is loaded and disengages when the load is released for smooth, free running in tacks and gybes. A precision CNC machined alloy sheave provides up to 14:1 holding power, yet minimises rope wear for extended sheet life. The unique adjustment mechanism allows the engagement load to be set precisely as required. The higher setting keeps the ratchet off for light air sailing or until the sheet load increases. The lower setting will trigger the ratchet at a lower sheet load. Ratchet engagement setting can also be varied to suit the load felt in your hand, so that younger sailors can set the engagement at a lower load to match their strength.
Features:
- Low friction
- Automatic ratchet engagement
- Adjustable setting for engagement load
- Up to 14:1 holding power
- Low friction, 2-stage ball bearing system
- High static and dynamic load capacity
- Lightweight
- Cheek cut-outs for easy bearing maintenance
Applications:
- Mainsheets on small off-the beach dinghies (Optimist, Sabot, Mirror, etc)
- Spinnaker sheets for Olympic class dinghies and modern asymmetric classes (470, 29er, B14, etc)
- 2:1 jib sheet systems on larger off-the-beach catamarans
Materials:
- Acetal ball bearings
- Precision machined and anodised grade 6061-T6 alloy sheave
- Impact modified, fibre reinforced and U.V. stabilised Nylon cheeks
- Grade 316 stainless steel load straps and head fittings
- Aluminium bronze pawl with Nickel-PTFE coating
Specification:
- Sheave diameter: 40mm (1 9/16")
- Maximum rope diameter: 8mm (5/16")
- Pin diameter: 4mm (5/32")
- Maximum Working Load: 250kg (550lb)
- Breaking Load: 500kg (1100lb)
- Weight: 85g (3.0oz)
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