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125 mm Aluminum Stand-up Block 125 mm Aluminum Stand-up Block
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125 mm Black Magic

125 mm Aluminum Stand-up Block

Part No. 3261
$940.75  Not available on-line. Please contact your Harken dealer.
Sheave Ø (mm)125 mm
Sheave Ø (in)4 15/16 in
Maximum line Ø (mm)19 mm
Maximum line Ø (in)3/4 in
Maximum working load (kg)4990 kg
Maximum working load (lb)11000 lb

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.

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

Sheave Ø (mm)125 mm
Sheave Ø (in)4 15/16 in
Length (mm)230 mm
Length (in)9 1/16 in
Width (mm)127.5 mm
Width (in)5 1/32 in
Weight (g)1268 g
Weight (oz)44.72 oz
Maximum line Ø (mm)19 mm
Maximum line Ø (in)3/4 in
Maximum working load (kg)4990 kg
Maximum working load (lb)11000 lb
Breaking load (kg)9977 kg
Breaking load (lb)22000 lb
A (mm)93 mm
A (in)3 21/32 in
B (mm)106 mm
B (in)4 3/16 in
C (mm)57 mm
C (in)2 1/4 in
IncludesIncludes padeye. Uses hole spacing and base dimensions of 648 padeye. Maximum working load decreases at varying angles. 
FootnoteUses hole spacing and base dimensions of 648 padeye. Maximum working load decreases at varying angles. 
DWG: 3261.DWG (open/save)
DXF: 3261.DXF (open/save)
IGS: 3261.IGS (open/save)
EPS: 3261.eps (open/save)
High-res JPG: 3261.jpg (open/save)
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