30mm/40mm Blocks Linked - Ball Bearing

Seldén 30mm/40mm Blocks Linked - Ball Bearing (404-101-21) is a 30 mm specialist ball-bearing block. It is intended for low-friction sheet and control-line systems on yachts, keelboats and dinghies. Stainless steel ball bearing races, stainless steel ball bearings and glass fibre reinforced sheave for best bearing strength even under high dynamic loads. Acetal bearing cage to prevent ball-to-ball friction and to reduce weight.. Select the block by line diameter, working load and attachment style, and compare the article number when replacing existing Seldén hardware. For new installations, make sure the supporting eye, padeye or deck structure is suitable for the expected load and that the block can align naturally with the rope lead.