J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Main Halyard Sheaves

Has anyone installed a main halyard sheave using the ball bearing option? If so what part number did you use?

I was just looking at the RigRite website and see that the J/30 sheaves on this page are the same as the J/24 sheaves on this page.

That means that the "standard" Sparcraft Delrin sheaves also offered on the J/24 page at Annapolis Performance Products should work on the J/30 main halyard.

The most accurate way is to take precise measurements of the old sheaves before removing them from the mast. This includes the sheave diameter, groove diameter (if applicable for wire rope), sheave width, and pin diameter. If you know the manufacturer of your boat, reach out to their customer service department. They might have spare parts catalogs or technical drawings that include the halyard sheave specifications. Stainless steel with ball bearings sounds like a great choice for durability and low friction. Make sure the chosen stainless steel grade is appropriate for marine use to withstand corrosion.

I replaced my main halyard sheaves to accommodate 3/8 line and got rid of the wire to rope splice a few seasons ago. So far so good. Dan #409