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75 mm Aluminum Double Footblock — Lockoff 75 mm Aluminum Double Footblock — Lockoff 75 mm Aluminum Double Footblock — Lockoff
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Black Magic Footblocks

75 mm Aluminum Double Footblock — Lockoff

Part No. 3237
$770.15  Not available on-line. Please contact your Harken dealer.
Sheave Ø (mm)75 mm
Sheave Ø (in)2 15/16 in
Maximum line Ø (mm)14 mm
Maximum line Ø (in)9/16 in
Maximum working load (kg)1572 kg
Maximum working load (lb)3465 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)75 mm
Sheave Ø (in)2 15/16 in
Length (mm)111 mm
Length (in)4 3/8 in
Height (mm)57 mm
Height (in)2 1/4 in
Weight (g)574 g
Weight (oz)20.24 oz
Maximum line Ø (mm)14 mm
Maximum line Ø (in)9/16 in
Maximum working load (kg)1572 kg
Maximum working load (lb)3465 lb
Breaking load (kg)3143 kg
Breaking load (lb)6930 lb
Number of fasteners
Fasteners (mm)8 FH mm
Fasteners (in)5/16 FH in
A (mm)10 mm
A (in)3/8 in
B (mm)29 mm
B (in)1 1/8 in
C (mm)71 mm
C (in)2 13/16 in
D (mm)21 mm
D (in)13/16 in
E (mm)76 mm
E (in)3 in
F (mm)110 mm
F (in)4 5/16 in
G (mm)16 mm
G (in)5/8 in
DWG: 3237.DWG (open/save)
DXF: 3237.DXF (open/save)
IGS: 3237.IGS (open/save)
EPS: 3237.eps (open/save)
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