Mainsail Halyard Chafe

[simons]

Hi everyone,

whenever the mainsail flaps a lot from one side to the other, the halyard chafes a lot and it will eat through the halyard in minutes. I have changed the aluminium sheaves to plastic sheaves, which did not help. I believe that the halyard rubs across the sheaves edge. I am thinking about fitting a restrainer, which will hold the halyard in line with the sheave, like

Schaefer Marine Hardware - Detail or
Schaefer Marine Hardware - Detail

I am worrying about the stress of the halyard on the restrainer, especially as the halyard will try to move sideways.

Has anyone solved this issues before?

Thanks

Simon

[Vasco]

This is the first time I've ever heard of this problem. Are you sure it's the sheaves?

[Paul Elliott]

You can get horrible chafe if the halyard diameter is too large for the sheave.