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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$120.99  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. Black Magic® Air Runners® are strong, lightweight blocks with extremely free-rolling sheaves. Blocks feature Torlon® roller bearings in a center cage for strength. Heads are offered with parallel/perpendicular shackles. Tangs attach turnbuckles, toggles, and other fittings. No tools required for installation.

Torlon® is a registered trademark of Solvay Advanced Polymers.

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.

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