100mm Aluminum Block — Swivel

Part No. 3246

Sheave Ø (mm) 100 mm

Sheave Ø (in) 3 15/16 in

Maximum line Ø (mm) 16 mm

Maximum line Ø (in) 5/8 in

Maximum working load (kg) 3402 kg

Maximum working load (lb) 7500 lb

We are sorry, but this product is not available online. Please contact your Harken dealer.

Find a dealer

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)	100 mm
Sheave Ø (in)	3 15/16 in
Length (mm)	203 mm
Length (in)	8 in
Weight (g)	623 g
Weight (oz)	21.98 oz
Shackle pin Ø (mm)	10 mm
Shackle pin Ø (in)	3/8 in
Maximum line Ø (mm)	16 mm
Maximum line Ø (in)	5/8 in
Maximum working load (kg)	3402 kg
Maximum working load (lb)	7500 lb
Breaking load (kg)	6804 kg
Breaking load (lb)	15000 lb

3D drawing - IGS 3246.IGS.zip 1.38 MB Drawing - DWG 3246.DWG.zip 0.09 MB Drawing - DXF 3246.DXF.zip 0.09 MB Photo - JPG 3246.jpg 0.08 MB Photo - EPS 3246.eps.zip 1.08 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.
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	2	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.
HBB87ASSY	1	more info
Roller Cage Assembly - 100 mm Black Magic Block Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.
HFS1271	3	more info	$0.54	Add to cart
Fastener - M6 x 1 x 16 mm Socket Head Cap Screw, Black Fasten with M6 hex wrench.
AL-3753	1	more info
Sideplate with Helicoils - 100 mm Black Magic Block Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface.
AL-3754	1	more info	$145.50	Add to cart
Sideplate with Isolators - 100 mm Black Magic Block Sideplates are Hard Lube-anodized for maximum UV protection and a smooth surface. Dissimilar metals are isolated to prevent corrosion.
HFS1272	1	more info
Fastener - M6 1 x 10mm Socket Head Shoulder Screw Cup, Black Set screw allows shackle to be fixed or to swivel.
H-34391A	1	more info	$81.30	Add to cart
Sheave Assembly - 100 mm Black Magic Block Sheaves are Hard Lube-anodized for maximum UV protection and a smooth surface. Captive Delrin® ball bearings carry side loads.