SELDÉN AUTOMATIC RATCHET BLOCKS

APPLICATIONS

• Dinghy main sheets.
• Dinghy spinnaker sheets

TECHNICAL FEATURES A45

• The blocks are designed with lightweight ø5 mm Delrin ball bearings and are available either with a composite sheave or an aluminium sheave. The latter version makes for more grip and the ability to cope with relative thin lines. 
• The sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in.
• The switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.

AUTOMATIC RACHET BLOCK INSIDE

1. When the block is low-loaded the ratchet mechanism is disengaged and the sheave spins free.
2. When the load on the block increases the ratchet engages and the sheave is locked in one direction.