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45mm Black Magic Runner Block
45mm Black Magic Runner Block
Harken

45mm Black Magic Runner Block

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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. 

Sheave Ø (mm) 45 mm
Sheave Ø (in) 1 3/4 in
Length (mm) 71 mm
Length (in) 2 13/16 in
Weight (g) 82 g
Weight (oz) 2.89 oz
Maximum line Ø (mm) 10 mm
Maximum line Ø (in) 3/8 in
Maximum working load (kg) 750 kg
Maximum working load (lb) 1653 lb
Breaking load (kg) 1500 kg
Breaking load (lb) 3306 lb

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