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

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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.

Specifications Resources Spare Parts

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

Drawing - DXF 3233.DXF.zip 0.1 MB Drawing - DWG 3233.DWG.zip 0.1 MB Photo - EPS 3233.eps.zip 1.12 MB 3D drawing - IGS 3233.IGS.zip 1.68 MB Photo - JPG 3233.jpg 0.08 MB

ID BOM	Qty		Price
2123	1	more info	$127.95	Add to cart
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	$38.50	Add to cart
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	$49.50	Add to cart
Roller Cage Assembly - 75mm Black Magic Block Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.
HFS806	4	more info	$1.07	Add to cart
Fastener - M5 x .8 x 16mm Socket Head Cap Screw, Black Fasten with M5 hex wrench.
SP-072	1	more info	$59.90	Add to cart
Headpost - 75/100mm Black Magic Block Black Magic blocks have 17-4 PH stainless headposts.
MP-3035	1	more info	$1.65	Add to cart
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	$7.50	Add to cart
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	$160.50	Add to cart
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	$8.55	Add to cart
Fastener - M6 x 1 x 20mm Socket Head Cap Screw, Black Set screw allows shackle to be fixed or to swivel.