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75mm Aluminum Double Block — Swivel

75mm Aluminum Double Block — Swivel

Part No. 3233

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) 3402 kg

Maximum working load (lb) 7500 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: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting. 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)134 mm
Length (in)5 1/4 in
Weight (g)721 g
Weight (oz)25.44 oz
Shackle pin Ø (mm)10 mm
Shackle pin Ø (in)3/8 in
Maximum line Ø (mm)14 mm
Maximum line Ø (in)9/16 in
Maximum working load (kg)3402 kg
Maximum working load (lb)7500 lb
Breaking load (kg)6804 kg
Breaking load (lb)15000 lb
32332123SP-072MP-3043MP3035AL-3734AL-3733AL-3732H-34390AH-34390AHBB86HBB86HFS806HFS806HFS821MS-196
ID BOM Qty Price
2123 1 more info $119.60
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10mm "D" Shackle — High Resistance

Forged stainless steel shackles are polished to a high luster and are stamped with the screw pin diameter. High-Resistance (HR) shackles are forged in 17-4PH stainless steel to handle high loads. They have an "HR" imprint for easy identification.

H-34390A 2 more info

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.

HBB86 2 more info $46.25
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Roller Cage Assembly - 75mm Black Magic Block

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

HFS806 4 more info $1.00
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Fastener - M5 x .8 x 16mm Socket Head Cap Screw, Black

Fasten with M5 hex wrench.

SP-072 1 more info $56.00
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Headpost - 75/100mm Black Magic Block

Black Magic blocks have 17-4 PH stainless headposts.

MP-3035 1 more info $1.55
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Headpost Collar Half - 75/100mm 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.

MP-3043 1 more info $7.00
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Headpost Collar Half - 75mm Black Magic Double Block, Cutout

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

AL-3732 1 more info

Sideplate with Helicoils - 75mm Black Magic Double Block

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

AL-3733 1 more info $150.00
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Sideplate with Isolator - 57mm Black Magic Double Block

Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface. Dissimilar metals isolated to prevent corrosion.

AL-3734 1 more info

Center Sideplate - 75mm Black Magic Double Block

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

MS-196 2 more info

Shear Tube - 75mm Black Magic Double Block

The shear tube is a stainless steel reinforcement between sideplates.

HFS821 1 more info $8.00
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Fastener - M6 x 1 x 20mm Socket Head Cap Screw, Black

Set screw allows shackle to be fixed or to swivel.