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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
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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