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75mm Aluminum Stand-up Block

Part No. 3244

Sheave Ø (mm) 75 mm

Sheave Ø (in) 2 15/16 in

Maximum line Ø (mm) 14 mm

Maximum line Ø (in) 9/16 in

Maximum working load (kg) 2268 kg

Maximum working load (lb) 5000 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)75 mm
Sheave Ø (in)2 15/16 in
Length (mm)151 mm
Length (in)5 15/16 in
Weight (g)442 g
Weight (oz)15.6 oz
Maximum line Ø (mm)14 mm
Maximum line Ø (in)9/16 in
Maximum working load (kg)2268 kg
Maximum working load (lb)5000 lb
Breaking load (kg)4536 kg
Breaking load (lb)10000 lb
A (mm)75 mm
A (in)2 15/16 in
B (mm)72 mm
B (in)2 13/16 in
C (mm)43 mm
C (in)1 11/16 in
IncludesIncludes padeye. Uses hole spacing and base dimensions of 627 padeye. Maximum working load decreases at varying angles.
FootnoteUses hole spacing and base dimensions of 627 padeye. Maximum working load decreases at varying angles.
Composer Export51019743862BOM IDDescriptionQty1AL-3728 ALPHA CHEEK12AL-3729 BETA CHEEK13H-34390A SHEAVE ASSM.14HBB86 ROLLER CAGE ASSM.15HFS788 FST. 5 X .8 X 10MM SHSS16HFS806 FST. 5 X .8 X 16MM SHCS37MP-1862 STANDUP DEVICE18MP-3021 FST. ISOLATOR39MP-3033 HD. POST COLLAR210MS-1974 PADEYE ASSM.1tooltip
ID BOM Qty Price
H-34390A 1 more info $38.50
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Sheave Assembly - 75mm Black Magic Block

Sheaves are Hard Lube-anodized for maximum UV protection and a smooth surface. Captive Delrin® ball bearings carry side loads.

MP-3033 2 more info $1.60
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Headpost Collar Half - 57/75mm Black Magic Block

Headpost collar isolates dissimilar metals to prevent corrosion. Collar accepts set screw that fixes shackle in one direction or allows it to swivel.

HBB86 1 more info $49.50
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Roller Cage Assembly - 75mm Black Magic Block

Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

HFS806 3 more info $1.07
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Fastener - M5 x .8 x 16mm Socket Head Cap Screw, Black

Fasten with M5 hex wrench.

AL-3728 1 more info $83.45
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Sideplate with Helicoils - 75mm Black Magic Block

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface.

AL-3729 1 more info $83.45
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Sideplate - 75mm Black Magic Block

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface.

MP-3021 3 more info $1.07
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Fastener Isolator - 5mm SK HD

Dissimilar metals are isolated to prevent corrosion.

HFS788 1 more info $1.65
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Fastener - M5 x 0.8 x 10mm Stainless Steel Socket Head Shoulder Screw Cup, Black

Set screw allows shackle to be fixed or to swivel.

MP-1862 1 more info $32.10
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Stand-up Base - 75mm Block

Made of durable, flexible rubber, the stand-up boot holds block upright without snagging lines.

MS-1974 1 more info $171.20
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Padeye Assembly with Head Post - 75mm Block

17-4 PH stainless steel padeye base. Use 6 mm (1/4") fasteners.

Note

Uses hole spacing and base dimensions of 627 padeye. Maximum working load decreases at varying angles.

F R E E   G R O U N D  S H I P P I N G

for orders over $100!

Valid on orders shipping within the United States

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