Other Custom Product
This series 200 top swivel has a 60mm diameter al.alloy plain composite bearing sheave incorporated to provide a low friction 2:1 purchase for asymmetric spinnakers and code zero halyards .A typical system would have the halyard dead ended at the top of the hoist on the front of the mast and then passed through the 60mm sheave of this swivel which is attached to the head of the sail to be hoisted. Using 2:1 purchase for the sail has the advantage of halving the load in the halyard which makes hoisting easier work and reduces the compression in the mast. Having a the halyard dead ended on the mast and a sheave box just below also provides a stable securing for the head of the sail eliminating the risk of the halyard twisting when the sail is furled . A spring loaded locking pin is used for fast attachment and removal this fitting to the head of the sail. A neoprene swivel cover RS20015 can be ordered separately if required.