Product Description

Harken 100mm Aluminum Double Footblock

Description – The entire line of Black Magic AirBlocks has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.

Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature Torlon roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Blocks are easily disassembled with a single hex wrench.

Either metric or imperial flathead fasteners may be used for mounting and are not exposed.

Sheave (mm) – 100

Sheave (in) – 3 15/16

Length (mm) – 143

Length (in) – 5 5/8

Height (mm) – 62

Height (in) – 2 7/16

Weight (g) – 967

Weight (oz) – 34.1

Maximum line (mm) – 16

Maximum line (in) – 5/8

Maximum working load (kg) – 2250

Maximum working load (lb) – 4950

Breaking load (kg) – 4500

Breaking load (lb) – 9900

Number of fasteners – 4

Fasteners (mm) – 10 FH

Fasteners (in) – 3/8 FH

A (mm) – 11

A (in) – 7/16

B (mm)38 mm

B (in)1 1/2 in

C (mm)93 mm

C (in)3 5/8 in

D (mm)28 mm

D (in)1 1/8 in

E (mm)100 mm

E (in)3 15/16 in

F (mm)143 mm

F (in)5 5/8 in

G (mm)21 mm

G (in)13/16