40 mm Ball Bearing Block - Double Cam System 30 is used for

System 30 is used for medium sized yachts

That means

The PBB60 Single Plain Bearing Block with Swivel and Bow-shackle is ideal for applications where the fixing point requires a wider shackle

Purchase: 3 N:1

suitable for J-measurements 4700 - 6000 mm and the sheet lead up the mast to a sheavebox

40 mm Ball Bearing Block - Double Cam System 30 is used forThe BBB40 Double Block features two 40 mm sheaves, designed for dynamic applications under medium loads. The stainless eye is fixed and allows for shackle or line attachments. Stainless steel ball bearings ensure smooth, low friction operation, while glass fiber reinforced cheeks provide strength and durability. Ideal for moderate and dynamic loads with minimal friction. Safe working Load: 500 kg Breaking Load: 1000 kg Max line size: 10 mm