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

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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. 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.

Specifications Resources Spare Parts

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 (lb)	10000 lb
Breaking load (kg)	4536 kg
A (mm)	75 mm
A (in)	2 15/16 in
B (mm)	72 mm
B (in)	2 13/16 in
Footnote	Uses hole spacing and base dimensions of 627 padeye. Maximum working load decreases at varying angles.
Includes	Includes padeye. Uses hole spacing and base dimensions of 627 padeye. Maximum working load decreases at varying angles.
C (mm)	43 mm
C (in)	1 11/16 in

3D drawing - IGS 3244.IGS.zip 1.17 MB Drawing - DXF 3244.DXF.zip 0.06 MB Photo - EPS 3244.eps.zip 1.19 MB Drawing - DWG 3244.DWG.zip 0.06 MB Photo - JPG 3244.jpg 0.09 MB

ID BOM	Qty		Price
H-34390A	1	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.
MP-3033	2	more info	$1.60	Add to cart
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	Add to cart
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	Add to cart
Fastener - M5 x .8 x 16mm Socket Head Cap Screw, Black Fasten with M5 hex wrench.
AL-3728	1	more info	$83.45	Add to cart
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	Add to cart
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	Add to cart
Fastener Isolator - 5mm SK HD Dissimilar metals are isolated to prevent corrosion.
HFS788	1	more info	$1.65	Add to cart
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	Add to cart
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
Padeye Assembly with Head Post - 75mm Block 17-4 PH stainless steel padeye base. Use 6 mm (1/4") fasteners.