Harken's 75mm Black Magic AirBlocks are used for sheeting and halyard systems, running backstays, and control lines.
They feature strong and long-lasting Torlon roller bearings housed in a center cage with sculpted hardcoat-anodized aluminum sideplates to protect the sideload ball bearings. Easily adaptable, they feature three-way, swivel heads that lock in front and side positions. The H3230 soft-attachment Loop block has a removable dead-end post for attachment to a pad eye. Lashings can also be used.
Corrosion is minimized by isolating dissimilar metals. AirBlocks can be taken apart with a single hex wrench.
|Breaking Load (lbs)||10000|
|Breaking Load (kg)||4536|
|Max Line Size (in)||9/16|
|Max Line Size (mm)||14|
|Safe Working Load (lbs)||5000|
|Safe Working Load (kg)||2268|
|Shackle Pin (in)||5/16|
|Shackle Pin (mm)||8|
|Sheave Diameter (in)||2 1/4,2 15/16|
|Sheave Diameter (mm)||75/57|