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57 mm Aluminum Double Footblock 57 mm Aluminum Double Footblock 57 mm Aluminum Double Footblock
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Black Magic Footblocks

57 mm Aluminum Double Footblock

Part No. 1964
$291.40$235.92  Limited Quantities In Stock
Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Maximum line Ø (mm)12 mm
Maximum line Ø (in) 7/16 in
Maximum working load (kg)750 kg
Maximum working load (lb)1650 lb

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.

Torlon is a registered trademark of Solvay Advanced Polymers.

Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)84 mm
Length (in)3 5/16 in
Height (mm)46 mm
Height (in)1 13/16 in
Weight (g)195 g
Weight (oz)6.9 oz
Maximum line Ø (mm)12 mm
Maximum line Ø (in) 7/16 in
Maximum working load (kg)750 kg
Maximum working load (lb)1650 lb
Breaking load (kg)1500 kg
Breaking load (lb)3300 lb
Number of fasteners
Fasteners (mm)6 FH mm
Fasteners (in)1/4 FH in
A (mm)7 mm
A (in)9/32 in
B (mm)23 mm
B (in)7/8 in
C (mm)52 mm
C (in)2 1/32 in
D (mm)16 mm
D (in)5/8 in
E (mm)58 mm
E (in)2 9/32 in
F (mm)84 mm
F (in)3 5/16 in
G (mm)12 mm
G (in)15/32 in
Manual: 4546.pdf (open/save)
DWG: 1964.dwg (open/save)
DXF: 1964.dxf (open/save)
IGS: 1964.igs (open/save)
EPS: 1964.eps (open/save)
High-res JPG: 1964.jpg (open/save)

DO NOT use Harken Equipment for Human suspension.

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