HARKEN 125MM BLACK MAGIC STAND UP BLOCK
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)
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
Footnote
Uses hole spacing and base dimensions of 648 padeye. Maximum working load decreases at varying angles.