please note: due to significant seasonal demand, order fulfilment and customer service response times are longer than normal.

for urgent orders or customer service requests, please email us with the subject line marked "Urgent".

Harken 100mm Aluminum Double Footblock

Item #


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 Ø (mm) - 100

Sheave Ø (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 Ø (mm) - 16

Maximum line Ø (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