0item in your cart

75mm Spriddle Block — Swivel

75mm Spriddle Block — Swivel

Part No. 3241

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: 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)199 mm
Length (in)7 13/16 in
Weight (g)503 g
Weight (oz)17.76 oz
Shackle pin Ø (mm)8 mm
Shackle pin Ø (in)5/16 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
Breaking load (kg)4536 kg
Breaking load (lb)10000 lb
Composer Export211846537101291BOM IDDescriptionQty12116 SHKL. 8MM D HR12AL-3747 ALPHA CHEEK13AL-3748 BETA CHEEK14H-22107A SHEAVE ASSM.15H-34390A SHEAVE ASSM.16HBB86 ROLLER CAGE ASSM.18HFS788 FST. 5 X .8 X 10MM SHSS19HFS806 FST. 5 X .8 X 16MM SHCS37HFS1103 FST. 6 X 1 X 16MM FHCS210MP-3033 HD. POST COLLAR211MS-268 SHEAR TUBE112SP-067 HEAD POST1tooltip
ID BOM Qty Price
2116 1 more info $72.55
Add to cart

8mm "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.

MP-121 38 more info $0.10
Add to cart

3/16" Delrin Ball Bearing — 1 Ball

Delrin actal resin is a black material which excels in low to moderate-load applications.

H-34390A 1 more info $36.00
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.

SP-067 1 more info $35.00
Add to cart

Headpost - 57/75mm Black Magic Block

Black Magic blocks have 17-4 PH stainless headposts.

MP-3033 2 more info $1.50
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 $46.25
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 $1.00
Add to cart

Fastener - M5 x .8 x 16mm Socket Head Cap Screw, Black

Fasten with M5 hex wrench.

HFS788 1 more info $1.55
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.

HFS1103 2 more info $6.00
Add to cart

Fastener - M6 x 1 x 16mm Flat Head Cap Screw, Black

Fasten with M6 hex wrench.

AL-3747 1 more info

Sideplate with Helicoils - 75mm Black Magic Spriddle Block

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

AL-3748 1 more info $214.00
Add to cart

Sideplate with Isolators - 75mm Black Magic Spriddle Block

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

MS-268 1 more info $86.00
Add to cart

Shear Tube - 75mm Black Magic Spriddle Block

The shear tube is a stainless steel reinforcement between sideplates.

AL-3324 1 more info $80.00
Add to cart

56mm Aluminum Sheave

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

REX-8010-021 1 more info $15.00
Add to cart

Rexnord Sleeve Bearing

Sliding bearings (known as sleeve, plain, full-contact, bushing, or journal bearings) are very high strength, but have nothing to reduce friction between contact areas.