Harken

Harken 57mm HL Standup Block

Harken 57mm HL Standup Block

Brand: Harken
Part Number: 3227
$382.95

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action.

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)57 mm
Sheave Ø (in)2 1/4 in
Length (mm)114 mm
Length (in)4 1/2 in
Weight (g)200 g
Weight (oz)7.04 oz
Maximum line Ø (mm)12 mm
Maximum line Ø (in)7/16 in
Maximum working load (kg)1134 kg
Maximum working load (lb)2500 lb
Breaking load (kg)2268 kg
Breaking load (lb)5000 lb
Fasteners (mm)6 mm
Fasteners (in)1/4 in
Fastener circle (mm)37 mm
Fastener circle (in)1 15/32 in


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