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57 mm Aluminum Air® Runner Block 57 mm Aluminum Air® Runner Block
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Black Magic® Air Runner®

57 mm Aluminum Air® Runner Block

Part No. 3039
$302.00$87.35  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) 1/2 in
Maximum working load (kg)1134 kg
Maximum working load (lb)2500 lb

Runners are used on running backstays of offshore boats to adjust mast bend for different wind conditions.

Integrated sideplate bails and recessed cotter key help produce a smooth design that won’t snag lifelines.

Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.

Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)86 mm
Length (in)3 3/8 in
Weight (g)124 g
Weight (oz)4.4 oz
Clevis pin Ø (mm)10 mm
Clevis pin Ø (in)3/8 in
Maximum line Ø (mm)12 mm
Maximum line Ø (in) 1/2 in
Maximum working load (kg)1134 kg
Maximum working load (lb)2500 lb
Breaking load (kg)2268 kg
Breaking load (lb)5000 lb
DWG: 3039.dwg (open/save)
DXF: 3039.dxf (open/save)
IGS: 3039.igs (open/save)
EPS: 3039.eps (open/save)
High-res JPG: 3039.jpg (open/save)

DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.

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