Product Description

Harken 125mm Aluminum 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) – 125 mm

Sheave (in) – 4 15/16 in

Length (mm) – 176 mm

Length (in) – 6 15/16 in Height (mm) – 43 mm

Height (in) – 1 11/16 in

Weight (g) – 972 g

Weight (oz) – 34.29 oz

Clevis pin (mm) – 19 mm

Clevis pin (in) – 3/4 in

Maximum line (mm) 19 mm

Maximum line (in) 3/4 in

Maximum working load (kg) – 4990 kg

Maximum working load (lb) – 11000 lb

Breaking load (kg) – 9977 kg

Breaking load (lb) – 22000 lb

Number of fasteners – 4

Fasteners (mm) – 12 FH

Fasteners (in)1/2 FH in

A (mm) – 14 mm

A (in) – 17/32 in

B (mm) – 50 mm

B (in) – 1 25/32 in

C (mm) – 113 mm

C (in) – 4 7/16 in

D (mm) – 35 mm

D (in) – 1 11/32 in

E (mm) – 125 mm

E (in) – 4 29/32 in

F (mm) – 176 mm

F (in) – 6 29/32 in

G (mm) – 23 mm

G (in) -29/32 in